Available in strip and wire
The Knight Group are a copper alloy stock and service centre, specialising in precision strip and wire grades. Our wide range of copper alloys are engineered to meet exacting standards across diverse industries. Our comprehensive range combines exceptional electrical conductivity, thermal performance, and mechanical properties to deliver solutions tailored to your specific requirements.
Cu-ETP / CW004A / C11000 / C101
Cu-HCP / CW021A / C10300 / C102
Cu-OF / CW008A / C10300 / C103
Cu-ETP1 / CW003A
CuZn30 / CW505L / C26000 / CZ106
CuZn33 / CW506L / C26800 / CZ107
CuZn37 / CW508L / C27200 / CZ108
CW501L / CZ101
CW503L / CZ103
CuZn36 / CW507L
CuZn36Pb3 / C36000
CuNi10Zn27/ CW401J / C74500 / NS103
CuNi12Zn24 / CW403J / C75700 / NS104
CuNi18Zn20 / CW409J / C76400 / NS106
CuNi18Zn27 / CW410J / C77000 / NS107
CuNi9Sn2 / Alloy C725 / CW351H / C72500
CuNi6 / IMPHY® CuNi6 / 2.0807 / Alloy 60
CuNi2 / IMPHY® CuNi2 / 2.0802 / Alloy 30
CuNi44 / Hecnum / IMPHY® CuNi44 / 2.0842
CuNi30/ CuNi30Mn / IMPHY® CuNi30/ 2.0838
CuNi10 / IMPHY® CuNi10 / 2.0811
CuNi23 / IMPHY® CuNi23 / 2.0881
CB101 / C17200
1.8% Be/Cu / CB101 / C17200
CuBe2 / CW101C/ CB101 / C17201
Alloy 174 / C17410
Copper and Copper Alloys form an important group of metals with many excellent properties. They have very good electrical and thermal conductivities, offering twice the conductivity of Aluminium and thirty times the conductivity of Stainless Steel. Copper Alloys have high ductility and are easy to fabricate, with ease of brazing and solderability. This group has many advantageous characteristics and includes alloys of exceptional strength (notably Copper Beryllium Alloys), corrosion resistance, and antimicrobial properties. The characteristics of Copper and Copper Alloys have resulted in extensive use of those alloys in a very wide range of applications. Copper is most commonly used in electrical and electronic applications, accounting for half of the Copper produced today. These Alloys can be formed, pressed, deep drawn or photochemically etched into the most complex of shapes.
In general terms the important commercial alloy groups are:
Our high conductivity copper products feature 99.9% copper content, offering:
The coppers within this group have differing degrees of purity and consequently exhibit different characteristics. For high conductivity requirements, such as electrical components, Oxygen-free Coppers are required. The extra purity enhances ductility and gives freedom from Hydrogen embrittlement or blistering during brazing operations.
General Applications: These grades are ideal for electrical components, busbars, terminals, and heat exchangers where maximum conductivity is essential.
Available Grades:
Commercially Pure (High Conductivity)
Commercially Pure (Medium Conductivity)Â
High Content Copper Alloys
High-content copper alloys represent a sophisticated balance in metallurgy, preserving the intrinsic conductivity of copper while strategically introducing small amounts of alloying elements, typically ranging from 1% to 6%, to enhance specific performance characteristics. These carefully formulated alloys address the limitations of pure copper by incorporating elements such as silver, tin, chromium, zirconium, or cadmium that modify the microstructure. The resulting precipitation hardening mechanisms and solid solution strengthening enable superior mechanical properties without significantly compromising electrical and thermal conductivity. Through precisely controlled thermal processing, these alloys develop optimised grain boundaries and precipitate distributions that deliver an exceptional combination of strength and conductivity.
These alloys retain a high copper content (94-99%) while incorporating small amounts of alloying elements to enhance specific properties:
We supply Cu-DHP (Deoxidised High Phosphorus Copper) in precision strip and wire, and Alloy 194 is available in precision strip. Both offer an optimal balance of conductivity and mechanical strength, making them ideal for demanding applications requiring a balance of conductivity and mechanical strength.  Alloy 194. Alloy 194 has 2.3% iron with small additions of Phosphorus and Zinc, resulting in excellent resistance to softening and able to withstand operating temperatures of 300°C and more for a few minutes. This is particularly beneficial for leadframe applications.
Available Grades
Brasses are Copper based alloys with Zinc as the essential secondary ingredient. The addition of Zinc to Copper creates a lower cost alloy with superior cold working strength to Copper but at the expense of reduced conductivity. The degree of alloying gives a varying range of properties that include strength, hardness, thermal and electrical conductivity, corrosion resistance, machinability, and ductility. The difference in alloying also creates a range of colours, ranging from red, yellow, gold, bronze, silver and brown, consequently making Brass ideal for decorative applications. Additionally, Brass is used in a wide range of applications, including Precision Stamping and Processing. Thanks to antimicrobial properties, they are highly beneficial in hospital environments and brewery facilities. An additional benefit of Brass is its recycling ability.
Our brass alloys deliver:
Applications: Brass alloys are widely used in electrical connectors, terminals, hardware, and decorative applications.
Available grades:
Phosphor Bronze is a Copper Tin alloy, often referred to as Phos Bronze or Tin Bronze. These alloys contain up to 7% Tin and a small quantity of Phosphorus, which is a residual from the deoxidation of the Copper melt before the addition of Tin. By increasing the Tin content, you can increase the corrosion resistance and improve the strength of the alloy.Â
The alloys in our copper phosphor bronze range offer:
Additionally, Phosphor Bronze offers good wear resistance, and thermal and electrical conductivity and can be significantly hardened by cold working to give excellent spring properties.Â
Applications: This Alloy dates back over 4000 years, when it could be found in weapons, armour, tools and decorative items such as jewellery. In modern manufacturing phosphor bronze is used in many applications, notably in the Marine, Chemical and Aerospace Sectors. Key applications include springs, electrical contacts, fasteners, and precision components requiring resilience.
Available Grades:
Nickel Silver Alloys
Unlike the name suggests, Nickel Silver alloys do not actually contain any Silver. This group of alloys take their name from their silvery appearance, created from a carefully balanced composition of copper (typically 55-65%), nickel (10-18%), and zinc (17-27%). With a desirable look that mimics Silver, these alloys can be polished to a high lustre, resulting in their wide use for adding decorative finishes to products, including jewellery, tableware and musical instruments. Their mechanical properties are somewhat similar to Brass Alloys. However, the addition of Nickel provides superior resistance to stress corrosion cracking and tarnishing.
Key Features of Nickel Silver Alloys:
Applications: Nickel Silver is suitable for many applications and can typically be found in electrical contacts, springs, decorative elements, and musical instruments.
Available grades:
Cupronickel
Cupronickel alloys contain 10-30% nickel and no zinc, setting them apart from nickel silvers. The most popular cupronickel grades are those with a content ratio 90/10 Copper Nickel and 70/30 Copper Nickel. 90/10 is more common as it is less expensive and has a good overall balance of properties, whilst 70/30 has greater saltwater resistance and strength. Known for exceptional corrosion resistance, cupronickel has been used in marine environments for over a century.
Nickel forms a solid solution with copper, preventing dezincification and stress corrosion cracking. A stable oxide layer enhances resistance to pitting, crevice corrosion, and biofouling.Â
These copper-nickel alloys feature:
Applications: Cupronickels exhibit excellent formability and remarkable resistance to seawater corrosion, making them suitable for marine and offshore applications. Beyond their corrosion performance, cupronickels maintain good thermal conductivity and weldability, making them invaluable in heat exchanger applications.
Available Grades:
Beryllium Copper
Beryllium Coppers are a group of high-performance copper-based alloys with exceptional mechanical properties and the essential electrical and thermal conductivity characteristics of copper. These alloys exhibit an extraordinary combination of properties including exceptional fatigue resistance, elasticity and non-sparking characteristics making them suitable for pressure responsive components such as spring applications and ideal for safety-critical applications. This makes them indispensable for a number of demanding industry sectors such as Petrochemical, Oil and Gas and Mining.Â
These sophisticated alloys typically contain 0.4-2.0% beryllium with small additions of other elements such as nickel, cobalt, or titanium that act as catalysts in the precipitation hardening process. What distinguishes beryllium copper is its remarkable response to age hardening treatments—a carefully controlled thermal process that enables these alloys to achieve tensile strengths exceeding 1400 MPa while maintaining electrical conductivity up to 45% IACS. The microstructural evolution during heat treatment involves the formation of nanoscale beryllide precipitates (primarily CuBe) that effectively impede dislocation movement, dramatically increasing strength and hardness.
Our premium high-performance alloys offer:
Applications: Used in critical applications including electrical connectors, springs, moulds, and safety tools. Beryllium Copper is also increasingly machined into miniaturised components, which are required by electronics and telecommunication manufacturing for everyday items such as mobiles, laptops, and tablets.
Available Grades
We can supply these alloys in the following forms:
i) Solution treated (Annealed), or
ii) Solution treated & temper rolled, i.e. 1/4 Hard, 1/2 Hard, Hard, etc.
Enamelled Copper
Our enamelled copper wire range is designed for high-performance electrical applications, offering excellent conductivity, thermal stability, and mechanical strength. Coated with a durable insulating layer, these wires provide superior electrical insulation, resistance to abrasion, chemicals, and moisture, and enhanced thermal endurance.
Our Enamelled Copper Wire is Available in:
COPPER ALLOYS CHEMICAL COMPOSITION (% BY WEIGHT) | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
MATERIAL DESIGNATION EN1652 or Alloy | NEAREST FIT | TYPICAL CHEMICAL COMPOSITION % | |||||||||||||
Symbol/ Name | Number | UNS | W.Nr. BS 2870 (Strip) BS 2873 (Wire) | Cu | Be | Co | Fe | Mn | Ni | P | Pb | Sn | Zn | Others | Impurities |
COMMERCIALLY PURE HIGH CONDUCTIVITY COPPERS | |||||||||||||||
Cu-ETP | CW004A | C11000 | C101 | 99.9 min | - | - | - | - | - | - | 0.005 max | - | - | Bi: 0.0005 max O: 0.04 max | 0.03 |
Cu-ETP1 | CW003A | C11040 | - | 99.9 min | - | - | - | - | - | - | - | - | - | O: 0.005-0.040 | 0.03 (excluding Oâ‚‚ & Ag) |
Cu-HCP | CW021A | C10300 | C102 | 99.95 min | - | - | - | - | - | 0.002 - 0.007 | - | - | - | - | - |
Cu-OF | CW008A | C10200 | C103 | 99.95 min | - | - | - | - | - | - | 0.005 | - | - | Bi: 0.0005 | 0.03 |
HIGH COPPER ALLOYS | |||||||||||||||
Cu-DHP | CW024A | C12200 | C106 | 99.9 min | - | - | - | - | - | 0.005 - 0.013 | 0.005 | - | - | - | 0.03 |
(Alloy 194) | C19400 | - | 97.0 min | - | - | 2.10 - 2.60 | - | - | 0.015 - 0.15 | 0.03 | 0.05 - 0.2 | - | - | ||
BRASS | |||||||||||||||
- | CW501L | - | CZ101 | Available by Request | |||||||||||
- | CW503L | - | CZ103 | Available by Request | |||||||||||
CuZn30 | CW505L | C26000 | CZ106 | 69.0 - 71.0 | - | - | 0.05 | - | 0.3 | - | 0.05 | 0.1 | Balance | Al: 0.02 | 0.1 |
CuZn33 | CW506L | C26800 | CZ107 | 66.0 - 68.0 | - | - | 0.05 | - | 0.3 | - | 0.05 | 0.1 | Balance | Al: 0.02 | 0.1 |
CuZn36 | CW507L | - | - | Available by Request | |||||||||||
CuZn36Pb3 | - | C36000 | - | Available by Request | |||||||||||
CuZn37 | CW508L | C27200 | CZ108 | 62.0 - 64.0 | - | - | 0.1 | - | 0.3 | - | 0.1 | 0.1 | Balance | Al: 0.05 | 0.1 |
PHOSPHOR BRONZE | |||||||||||||||
CuSn5 | CW451K | C51000 | PB102 | Balance | - | - | 0.1 | - | 0.2 | 0.01 - 0.4 | 0.02 | 4.5 - 5.5 | 0.2 | Al: 0.05 | 0.2 |
CuSn6 | CW452K | C51900 | PB103 | Balance | - | - | 0.1 | - | 0.2 | 0.01 - 0.4 | 0.02 | 5.5 - 7.0 | 0.2 | Al: 0.05 | 0.2 |
CuSn8 | CW453K | - | - | Balance | - | - | ≤0.1 | - | - | 0.03-0.35 | ≤0.05 | 7.5-8.5 | ≤0.3 | - | - |
NICKEL SILVER | |||||||||||||||
CuNi10Zn27 | CW401J | C74500 | NS103 | 61.0 - 64.0 | - | - | 0.3 | 0.5 | 9.0 - 11.0 | - | 0.05 | - | Balance | - | 0.2 |
CuNi12Zn24 | CW403J | C75700 | NS104 | 63.0 - 66.0 | - | - | 0.3 | 0.5 | 11.0 - 13.0 | - | 0.03 | 0.03 | Balance | - | 0.2 |
CuNi18Zn20 | CW409J | C75200 | NS106 | 60.0 - 63.0 | - | - | 0.3 | 0.5 | 17.0 - 19.0 | - | 0.03 | 0.03 | Balance | - | 0.2 |
CuNi18Zn27 | CW410J | C77000 | NS107 | 53.0 - 56.0 | - | - | 0.3 | 0.5 | 17.0 - 19.0 | - | 0.03 | 0.03 | Balance | - | 0.2 |
CuNi9Sn2 (Alloy 725) | CW351H | C72500 | Balance | - | - | 0.3 | 0.3 | 8.5 - 10.5 | - | 0.03 | 1.8 - 2.8 | 0.1 | - | 0.1 | |
CUPRONICKEL | |||||||||||||||
Alloy 30 (70/30) | CuNi2 | C70200 | 2.0802 | 98.0 | - | - | - | - | 2.0 | - | - | - | - | Trace | |
Alloy 60 (60/40) | CuNi6 | C70500 | 2.0807 | 98.0 | - | - | - | - | 2.0 | - | - | - | - | Trace | |
Alloy 90 (90/10) | CuNi10 | C70600 | 2.0811 | 90.0 | - | - | - | - | 10.0 | - | - | - | - | Trace | |
– | CuNi30Mn | C71500 | 2.0838 | 75.0 | - | - | - | 2.0 | 23.0 | - | - | - | - | Trace | |
– | CuNi23Mn | C71100 | 2.0881 | 67.0 | - | - | - | 3.0 | 30.0 | - | - | - | - | Trace | |
Hecnum | CuNi44 | C72150 | 2.0842 | 55.0 | - | - | - | 1.0 | 44.0 | - | - | - | - | Trace | |
BERYLLIUM COPPER ALLOYS |
MECHANICAL PROPERTIES OF COPPER, BRASS & BRONZE STRIP | ||||||||
---|---|---|---|---|---|---|---|---|
MATERIAL DESIGNATION EN1652 or Alloy | NEAREST FIT | Material Condition (R Value) | Proof Strength 0.2% MPa | Tensile Strength 0.2% MPa | Elong. % (50mm Gauge Length) | Hardness (VPN) | ||
Symbol/ Name | EN Number | UNS | BS 2870 | |||||
HIGH CONDUCTIVITY COPPER | ||||||||
Cu-ETP | CW004A | C11000 | C101 | R220 | 140 Max (≤20.3 ksi) | 220-260 (31.9–37.7 ksi) | 33 Min | 40-65 |
R240 | 180 Min (≥26.1 ksi) | 240-360 (34.8–43.5 ksi) | 8 Min | 65-95 | ||||
R290 | 250 Max (≥36.3 ksi) | 290-360 (42.1–52.2 ksi) | 4 Min | 90-110 | ||||
R360 | 320 Min (≥46.4 ksi) | 360 Min (≥52.2 ksi) | 2 Min | 110 Min | ||||
Cu-HCP | CW021A | C10300 | C102 | R220 | 140 Max (≤20.3 ksi) | 220-260 (31.9–37.7 ksi) | 33 Min | 40-65 |
R240 | 180 Min (≥26.1 ksi) | 240-360 (34.8–43.5 ksi) | 8 Min | 65-95 | ||||
R290 | 250 Max (≥36.3 ksi) | 290-360 (42.1–52.2 ksi) | 4 Min | 90-110 | ||||
R360 | 320 Min (≥46.4 ksi) | 360 Min (≥52.2 ksi) | 2 Min | 110 Min | ||||
Cu-OF | CW008A | C26000 | C103 | R220 | 140 Max (≤20.3 ksi) | 220-260 (31.9–37.7 ksi) | 33 Min | 40-65 |
R240 | 180 Min (≥26.1 ksi) | 240-360 (34.8–43.5 ksi) | 8 Min | 65-95 | ||||
R290 | 250 Max (≥36.3 ksi) | 290-360 (42.1–52.2 ksi) | 4 Min | 90-110 | ||||
R360 | 320 Min (≥46.4 ksi) | 360 Min (≥52.2 ksi) | 2 Min | 110 Min | ||||
HIGH CONTENT COPPER | ||||||||
Cu-DHP | CW024A | C12200 | C106 | R220 | 140 Max (≤20.3 ksi) | 220-260 (31.9–37.7 ksi) | 33 Min | 40-65 |
R240 | 180 Min (≥26.1 ksi) | 240-360 (34.8–43.5 ksi) | 8 Min | 65-95 | ||||
R290 | 250 Max (≥36.3 ksi) | 290-360 (42.1–52.2 ksi) | 4 Min | 90-110 | ||||
R360 | 320 Min (≥46.4 ksi) | 360 Min (≥52.2 ksi) | 2 Min | 110 Min | ||||
(Alloy 194) | C19400 | - | R300 | 240 Max | 300-340 | 16 | 80-100 | |
R340 | 240 Min | 340-390 | 8 | 100-120 | ||||
R370 | 330 Min | 370-430 | 6 | 120-140 | ||||
R420 | 380 Min | 420-480 | 6 | 130-150 | ||||
R470 | 440 Min | 470-530 | 4 | 140-160 | ||||
R520 | 470 Min | 520-580 | 3 | 150-165 | ||||
BRASS | ||||||||
CuZn30 | CW505L | C26000 | CZ106 | R270 | 160 Max | 270-320 | 40 | 55-95 |
R350 | 170 Min | 350-430 | 21 | 95-125 | ||||
R410 | 260 Min | 410-490 | 9 | 120-155 | ||||
R480 | 430 Min | 480 Min | - | 150 Min | ||||
CuZn33 | CW506L | C26800 | CZ107 | R280 | 170 Max | 280-380 | 40 | 55-90 |
R350 | 170 Min | 350-430 | 23 | 90-125 | ||||
R420 | 300 min | 420-500 | 6 | 125-155 | ||||
R500 | 450 Min | 500 Min | - | 155 Min | ||||
CuZn37 | CW508L | C27200 | CZ108 | R300 | 180 Max | 300-370 | 38 | 55-95 |
R350 | 170 Min | 350-440 | 19 | 95-125 | ||||
R410 | 300 Min | 410-490 | 8 | 120-155 | ||||
R480 | 430 Min | 480-560 | 3 | 150-180 | ||||
R550 | 500 Min | 550 Min | - | 170 Min | ||||
PHOSPHOR BRONZE | ||||||||
CuSn5 | CW451K | C51000 | PB102 | R310 | 250 Max | 310-390 | 45 | 75-105 |
R400 | 240 Min | 400-500 | 14 | 120-160 | ||||
R490 | 450 Min | 490-580 | 8 | 160-190 | ||||
R550 | 520 Min | 550-640 | 4 | 180-210 | ||||
R630 | 600 Min | 630-720 | 3 | 200-230 | ||||
R690 | 670 Min | 690 Min | - | 220 Min | ||||
CuSn6 | CW452K | C51900 | PB103 | R350 | 300 Max | 350-420 | 45 | 80-110 |
R420 | 260 Min | 420-520 | 17 | 125-165 | ||||
R500 | 450 Min | 500-590 | 8 | 160-190 | ||||
R560 | 500 Min | 560-650 | 5 | 180-210 | ||||
R640 | 600 Min | 640-730 | 3 | 200-230 | ||||
R720 | 690 Min | 720 Min | - | 220 Min | ||||
NICKEL SILVER | ||||||||
CuNi10Zn27 | CW401J | C74500 | NS103 | R360 | 230 Max | 360-430 | 35 | 80-110 |
R430 | 230 Min | 430-510 | 8 | 110-150 | ||||
R490 | 400 Min | 490-580 | 8 | 150-180 | ||||
R550 | 480 Min | 550-640 | - | 170-200 | ||||
R620 | 580 Min | 620 Min | 2 | 190 Min | ||||
CuNi12Zn24 | CW403J | C75700 | NS104 | R360 | 230 Max | 360-430 | 35 | 80-110 |
R430 | 230 Min | 430-510 | 8 | 110-150 | ||||
R490 | 400 Min | 490-580 | 8 | 150-180 | ||||
R550 | 480 Min | 550-640 | - | 170-200 | ||||
R620 | 580 Min | 620 Min | 2 | 190 Min | ||||
CuNi18Zn20 | CW409J | C76400 | NS106 | R380 | 250 Max | 380-450 | 27 | 85-115 |
R450 | 250 Min | 450-520 | 9 | 115-160 | ||||
R500 | 410 Min | 500-590 | 3 | 160-190 | ||||
R580 | 510 Min | 580-670 | - | 180-210 | ||||
R640 | 600 Min | 640-730 | - | 200-230 | ||||
CuNi18Zn27 | CW410J | C77000 | NS107 | R390 | 280 Max | 390-470 | 30 | 90-120 |
R470 | 280 Min | 470-540 | 11 | 120-170 | ||||
R540 | 450 Min | 540-630 | 3 | 170-200 | ||||
R600 | 550 Min | 600-700 | - | 190-220 | ||||
R700 | 660 Min | 700-800 | 2 | 220-250 | ||||
CuNi9Sn2 (Alloy 725) | CW351H | C72500 | - | R340 | 250 Max | 340-410 | 30 | 70-100 |
R380 | 200 Min | 380-470 | 8 | 110-150 | ||||
R450 | 370 Min | 450-530 | 4 | 140-170 | ||||
R500 | 450 Min | 500-580 | 2 | 160-190 | ||||
R560 | 520 Min | 560-650 | - | 180-210 | ||||
CUPRONICKEL | ||||||||
Hecnum / CuNi44 | - | C72150 | 2.0842 | Resistance Wire Grade Only | ||||
CuNi30Mn | - | C71500 | 2.0838 | Resistance Wire Grade Only | ||||
CuNi23Mn | - | C71100 | 2.0881 | Resistance Wire Grade Only | ||||
CuNi2 / Alloy 30 (70/30) | - | C70200 | 2.0802 | Resistance Wire Grade Only | ||||
CuNi6 / Alloy 60 (60/40) | - | C70500 | 2.0807 | Resistance Wire Grade Only | ||||
CuNi10 / Alloy 90 (90/10) | - | C70600 | 2.0811 | Resistance Wire Grade Only | ||||
BERYLLIUM COPPER | ||||||||
( Alloy 174 ) | C17410 | - | 172 Hard (Solution Heat Treated, Cold Rolled and Precipitation Hardened at the Mill) | 410 Min | 650 Min | 10 | 180-230 |
MECHANICAL PROPERTIES OF COPPER, BRASS & BRONZES WIRE | ||||||
---|---|---|---|---|---|---|
Material Designation EN 12166 : 1998 | Nearest Fit | Material Condition | U.T.S Rm N/mm² | Elongation 50 % min; | ||
Symbol | Number | UNS | BS 2873 | |||
COMMERCIALLY PURE COPPER | ||||||
Cu-ETP | CW 004A | C 10100 | C 101 | Annealed | 220 – 260 | 33 |
Cu-ETP1 | CW003A | C11040 | - | Annealed | ||
Cu-OF | CW 008A | C 10300 | C 103 | Annealed | 220 – 260 | 33 |
HIGH CONTENT COPPER | ||||||
Cu-DHP | CW024A | C12200 | C106 | Available by Request | ||
BRASS | ||||||
- | CW501L | - | CZ101 | Available by Request | ||
- | CW503L | - | CZ103 | Availalbe by Request | ||
Cu Zn 30 | CW 505 L | C 26000 | CZ 106 | Annealed | 310 – 410 | 40 |
1/2 Hard | 540 – 640 | |||||
Hard | 620 – 720 | |||||
CuZn36 | CW507L | - | - | Available by Request | ||
CuZn36Pb3 | - | C36000 | - | Available by Request | ||
Cu Zn 37 | CW 508 L | C 27200 | CZ 108 | Annealed | 300 – 380 | 35 |
1/2 Hard | 560 – 700 | |||||
Hard | 700 min | |||||
PHOSPHOR BRONZE | ||||||
Cu Sn 5 | CW 451 K | C 51000 | PB 102 | Annealed | 330 – 420 | 45 |
1/2 Hard | 500 – 600 | |||||
Hard | 690 – 850 | |||||
Spring Hard | 850 min | |||||
Cu Sn 6 | CW 452 K | C 51900 | PB 103 | Annealed | 360 – 440 | 60 |
1/2 Hard | 530 – 630 | |||||
Hard | 740 – 900 | |||||
Spring Hard | 900 min | |||||
CuSn8 | CW453K | - | - | Available by Request | ||
NICKEL SILVER | ||||||
Cu Ni 10 Zn 27 | CW 401 J | C 74500 | NS 103 | Annealed | Available by Request | |
1/2 Hard | Available by Request | |||||
Hard | Available by Request | |||||
Cu Ni 12 Zn 24 | CW 403 J | C 75700 | NS 104 | Annealed | Available by Request | |
1/2 Hard | Available by Request | |||||
Hard | Available by Request | |||||
Cu Ni 18 Zn 20 | CW 409 J | C 75200 | NS 106 | Annealed | Available by Request | |
1/2 Hard | Available by Request | |||||
Hard | Available by Request |
COPPER ALLOY CHARACTERISTICS AND APPLICATIONS | ||||||
---|---|---|---|---|---|---|
MATERIAL DESIGNATION BSEN1652 (Strip) BSEN12166 (Wire) | NEAREST FIT | Key Features | Key Markets | Applications | ||
Symbol/ Name | EN Number | UNS | W.Nr. BS 2870 (Strip) BS 2873 (Wire) | |||
PURE COPPER (HIGH CONDUCTIVITY COPPERS) | ||||||
Cu-ETP | CW004A | C11000 | C101 | Cu-ETP has no susceptibility to hydrogen embrittlement as well as a high electrical conductivity of 101% IACS. This is due to a high purity and an absence of deoxidisers. | Architectural, Chemical Engineering, Culinary, Electrical | Electrical Components, Chemical Process Equipment, Radiators, Kitchen Appliances, Conductors, Transformer Windings, Wire: Shapes, Knitting, Braiding, Weaving |
Cu-ETP1 | CW003A | C11040 | - | Cu-ETP1 is an enhanced purity Electrolytic Tough Pitch Copper with tighter controls on impurities for superior performance. | Aerospace Automotive Electronics | Lead-frames, Conductor wire, Motor windings, Busbars Contact springs, Electrical contacts Slip rings, Electrical components, Electronic connectors, Magnetic wire |
Cu-HCP | CW021A | C10300 | C102 | Cu-HCP is a de-oxidised,oxygen-free Copper with a low residual phosphorus content. Offers excellent formability and weldability, as well as good soldering and brazability. | Electrical, Manufacturing | Electrical Contacts & cable Industry, Pressure Vessels |
Cu-OF | CW008A | C10200 | C103 | Cu-OF is a High purity Copper Oxygen Free (maximum of 10ppm) alloy, offering 100% IACS. It is immune from hydrogen embrittlement and offers similar formability to Cu-ETP. | Aerospace Electronics, Telecommunications | Printed Circuits, Electronic Components, Telecommunication Cables, Conductor, Heat Exchanger, Heat sinks |
HIGH COPPER ALLOY | ||||||
Cu-DHP | CW024A | C12200 | C106 | Cu-DHP is a de-oxidised, non-arsenical, oxygen-free 99.9% pure Copper, with limited residual phosphorus content. It offers excellent formability and weldability, as well as good corrosion resistance. This makes it ideal for applications where electrical conductivity is only of secondary importance. | Architectural, Electrical, Plumbing | Piping & Fittings, Heat Exchangers, Transistors, Air/Hydraulic/Oil Lines |
Alloy 194 | C19400 | - | - | Alloy 194 is a copper-iron alloy often classified as a high-copper alloy due to its substantial copper content, typically exceeding 94%. This grade was developed to enhance strength while retaining much of copper's electrical and thermal conductivity. The addition of iron, phosphorus, and a small amount of tin enhances strength and durability without significantly compromising its conductive properties, maintaining a balance of strength and electrical performance. It is a high-strength, high-conductivity copper alloy designed for demanding electrical applications requiring both mechanical durability and conductivity. It is typically found in automotive terminals, lead frames, electrical connectors, power distribution systems, and electronic circuits, as well as other critical electrical and mechanical components where pure copper may lack sufficient strength. Alloy 194 provides excellent formability, strength, and moderate electrical conductivity (60% IACS compared to pure copper's 100% IACS). It exhibits moderate resistance to softening, remaining stable up to approximately 300°C (572°F). However, prolonged exposure to higher temperatures leads to gradual softening, reducing mechanical strength over time. Softening begins at temperatures exceeding 300°C (572°F), with the degradation rate dependent on temperature exposure, mechanical stress, and duration at elevated temperatures. While it offers superior strength compared to pure copper, it is not as strong or resistant to softening as other copper alloys, such as Cu-Ni-Si or Cu-Be | Electrical & Electronics, Automotive, Telecommunications & Networking, Aerospace & Defense, Industrial & Power Distribution , Renewable Energy & Battery Systems | Lead frames for semiconductor packaging, Electrical connectors and terminals, Power distribution components, Relay springs and contacts, Printed circuit board (PCB) components, Automotive electrical connectors & terminals, Powertrain electrical components, Battery connectors and bus bars, Engine control unit (ECU) connectors, RF (radio frequency) and microwave connectors, Signal transmission terminals, High-speed data connectors, Fiber optic cable components High-reliability electrical connectors, Avionics wiring systems, Satellite and radar systems, Power distribution in aircraft, Switchgear and circuit breakers, Busbars for electrical panels, High-reliability electrical contacts, Transformer components, Solar panel interconnects, Wind turbine electrical components, Energy storage system busbars, EV (electric vehicle) battery connectors |
BRASS | ||||||
- | CW501L | - | CZ101 | Copper alloy CW501L (CZ101) is a high-zinc brass consisting of approximately 90% copper and 10% zinc. This highly formable and corrosion-resistant alloy is well-suited for precision strip and wire applications. It is characterised by excellent ductility, superior cold working properties, and good corrosion resistance in non-aggressive environments, though it is unsuitable for marine or highly acidic conditions. Additionally, CW501L has moderate electrical conductivity (approximately 25% IACS) and exhibits moderate strength. These attributes make it ideally suited for precision components in electronics, automotive, aerospace, and medical device manufacturing. CW501L is commonly used in applications requiring good electrical and thermal conductivity while maintaining high formability. Compared to higher-zinc brasses like CZ108 (CW508L) and CZ106 (CW505L), CW501L (CZ101) offers superior ductility but lower strength, making it ideal for forming and bending operations. Processing techniques such as cold rolling to achieve desired thickness, annealing at temperatures between 450-600°C (842-1112°F) to improve ductility, and electroplating for enhanced surface properties enhance CW501L's suitability for precision applications. This alloy is widely employed in shielding components, electrical connectors, and sensor wires, ensuring reliable performance in critical applications | Electronics & Electrical, Automotive, Aerospace, Medical Devices, Industrial Equipment | EMI shielding, flexible connectors, switch contacts, Fine wire for winding, electrical interconnects, Heat exchanger fins, connectors, Sensor leads, grounding wires, Instrumentation components, shielding, Signal transmission wires, Precision springs, flexible contacts, Guide wires, implantable sensors, Precision stamped parts, Fastening wire, safety wire |
- | CW503L | - | CZ103 | Available by Request | ||
CuZn30 | CW505L | C26000 | CZ106 | CuZn30 is a solid solution strengthened Brass. The added 30% Zinc increases mechanical strength, but decreases conductivity. It offers the maximum ductility of the CuZn alloys and has good deep drawing properties. | Electronics, Decorative | Connectors, Electronic Components, Jewellery, Model Making, Ferrules, Switches |
CuZn33 | CW506L | C26800 | CZ107 | CuZn33 is a solid solution strengthened Brass with 33% Zinc, increasing the inclination for stress cracking corrosion compared to CuZn30. | Automotive, Electrical Engineering | Electrical Components, Connectors, Clips, Springs |
CuZn36 | CW507L | - | - | Available by Request | ||
CuZn36Pb3 | - | C36000 | - | Available by Request | ||
CuZn37 | CW508L | C27200 | CZ108 | Considered a general purpose Copper alloy, CuZn37 has Zinc additions of 37%. Higher Zinc additions increase the inclination for stress cracking corrosion. This Copper alloy is ideal for simple forming operations | Electronics, Plumbing, Decorative | Electric Brackets, Springs, Hose Couplings, Clips, Radiator Cores, Contacts, Wire: Knitting and Weaving for RFI Applications |
PHOSPHOR BRONZE | ||||||
CuSn5 | CW451K | C51000 | PB102 | CuSn5 is a solid solution strengthened Brass with 5% tin. It provides a good combination of conductivity and strength with good formability and resistance to corrosion and fatigue. | Automotive, Electrical Engineering | Connectors, Springs, Stamped Parts, Contacts, Wire Shapes, Lock Levers, Switches |
CuSn6 | CW452K | C51900 | PB103 | Alloy CuSn6 has a higher tin content than CuSn5 providing higher tensile strength, corrosion resistance and spring characteristics. It is wear resistant and offers is generally used for more severe service conditions than CuSn5. | Automotive, Electrical Engineering, Paper and Pulp Industry, Chemical Industry | Flexible Hoses, Springs, Conductive Springs, Contacts, Switches, Brushes |
CuSn8 | CW453K | - | - | Available by Request | ||
NICKEL SILVER | ||||||
CuNi10Zn27 | CW401J | C74500 | NS103 | CuNi10Zn27 is a Copper Alloy with good corrosion resistance in rural and marine atmospheres. It has excellent cold working properties and is suitable for various forming processes. It offers many benefits including good formability, readily soldered or brazed and attractive colour. However, it has poor hot working characteristics. | Decorative, Industrial, Marine | Nameplates, Light & Optical Fittings, Door Kicking Plates, Trophies. Springs, Contacts, Model Making, Jewellery |
CuNi12Zn24 | CW403J | C75700 | NS104 | Similarly to CuNi10Zn27, CuNi12Zn24 has good resistance to atmospheric corrosion, offering resistance to both neutral and alkaline solutions, however resistance to oxidising acids is poor. The alloy has good cold forming properties but poor machinability. | Industrial, Telecommunications, Decorative, Marine | Relay Springs, Contact Springs, Connectors, Pressure Membranes, Engraved Name Plates |
CuNi18Zn20 | CW409J | C76400 | NS106 | CuNi18Zn20 has good resistance to atmospheric corrosion with good cold formability and spring properties. It is suitable for many decorative applications and becomes progressively whiter with increased nickel content. It has a much lower sensitivity to SCC than Brasses. | Electronics, Telecommunications, Decorative | Shielding, Connectors, Relay Springs, Engraved Name Plates, Decorative Purposes, Brush Anchor Wire, Pins, Jewellery |
CuNi18Zn27 | CW410J | C77000 | NS107 | CuNi18Zn27 provides good corrosion resistance, good formability, and good tarnish resistance. Its colour makes it ideal for decorative purposes. | Electronics, Telecommunications, Decorative | Shielding, Connectors, Relay Springs, Engraved Name Plates, Decorative Purposes |
CuNi9Sn2 (Alloy 725) | CW351H | C72500 | - | With a good combination of fatigue strength, formability and resistance to corrosion, CuNi9Sn2 (Alloy 725) offering manufacturers many benefits, particularly for electrical components. | Telecommunications, Electronics | Circuit Breaker Components, Relay & Switch Springs, Bellows, Clamps |
CUPRONICKEL | ||||||
Alloy 30 (70/30) | CuNi2 | C70200 | 2.0802 | Characterised by low resistivity, this alloy offers high resistance to oxidation and corrosion. The maximum operating temperature is 300°C. | Electronics | tube electrical welding fittings, ribbons used for heating of bimetals. |
Alloy 60 (60/40) | CuNi6 | C70500 | 2.0807 | Characterised by low resistivity, this alloy offers high resistance to oxidation and corrosion. The maximum operating temperature is 300°C. | Electronics | tube electrical welding fittings, ribbons used for heating of bimetals. |
Alloy 90 (90/10) | CuNi10 | C70600 | 2.0811 | This alloy offers high resistance to oxidation and chemical corrosion. Maximum working temperature is 400°C. | Electronics | low value resistors, heating wires and mats. |
– | CuNi30Mn | C71500 | 2.0838 | This alloy offers high resistance to oxidation and chemical corrosion. Maximum working temperature is 500°C. | Electronics | resistors, heating cords and mats. |
– | CuNi23Mn | C71100 | 2.0881 | This alloy offers high resistance to oxidation and chemical corrosion. Maximum working temperature is 500°C. | Electronics | resistors, heating cables and detectors for fuses. |
Hecnum | CuNi44 | C72150 | 2.0842 | Medium resistivity combined with low temperature coefficient of resistance makes this alloy ideal for resistors. It is suitable for temperatures up to 400°C. | Electronics | thermocouples, resistors, heating wires and cables. |
BERYLLIUM COPPER ALLOYS |
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All data is provided for informational purposes only. In no event will the Knight Group and its subsidiaries, be liable for in respect of any action taken by any third party arising from using the information taken from our online or printed sources. Chemical and Mechanical Properties should not be construed as maximum or minimum values for specifications, nor should information be used to assess suitability for a particular use or application. The information and data provided is deemed to be accurate to the best of our knowledge and may be revised anytime without notice and assume no duty to update
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