Precision Strip & Wire Copper Alloys - Knight Group

Copper Alloys

Stock & Service Centre

Precision Strip & Wire Specialists for:

Commercially Pure Copper | Brass | Phosphor Bronze | Nickel Silver

Cupronickel | Beryllium Copper | Enamelled Copper

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.

Available Copper Alloy Grades

Cu-ETP / CW004A / C11000 / C101

Cu-HCP / CW021A / C10300 / C102

Cu-OF / CW008A / C10300 / C103

Cu-ETP1 / CW003A

Cu-DHP / CW024A / C12200 / C106

Alloy 194 / C19400 / CuFe2P

CuZn30 / CW505L / C26000 / CZ106

CuZn33 / CW506L / C26800 / CZ107

CuZn37 / CW508L / C27200 / CZ108

CW501L / CZ101

CW503L / CZ103

CuZn36 / CW507L

CuZn36Pb3 / C36000

CuSn5 / CW451 K / C51000 / PB102

CuSn6 / CW452K / C51900 / PB103

CuSn8 / CW451K

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

Enamelled Copper Grade 1

Enamelled Copper Grade 2

What are the benefits of using Copper Alloys?

Copper Alloys offer many manufacturing benefits including strength, conductivity, corrosion resistance, machinability and ductility. With superior electrical and thermal conductivity, and an attractive appearance, Copper Alloys are suitable for a wide range of applications.

What are the disadvantages of using Copper Alloys?

Copper Alloys can be more susceptible to corrosion, particularly oxidation. which can impact its suitability for some applications.

Guide to Copper Alloys

Copper Alloy Families

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:

  • Commercially Pure Copper
  • High Content Copper
  • Brass
  • Phosphor Bronze 
  • Nickel Silver
  • Cupronickel (Copper Nickel)
  • Copper Beryllium
Commercially Pure Copper

Our high conductivity copper products feature 99.9% copper content, offering:

  • Superior electrical conductivity (101% IACS minimum)
  • Excellent thermal conductivity
  • High ductility for complex forming operations
  • Resistance to hydrogen embrittlement

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)

  • Cu-ETP (C101 / CW004A / C11000)
  • Cu-ETP1 (C102 / CW003A)
  • Cu- HCP (C102 / CWO21A)
  • Cu-OF  (C103 / CW008A / C10300)

Commercially Pure (Medium Conductivity) 

  • Cu-DHP (C106 / CW024A /  C12200)
High Content Copper

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:

  • Increased Strength – Improved mechanical properties compared to pure copper
  • High Conductivity – Maintains 80-95% IACS electrical conductivity
  • Enhanced Heat Resistance – Suitable for high-temperature applications
  • Superior Stress Relaxation Resistance – Ideal for maintaining performance under mechanical stress

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

  • Cu-DHP C106/CW024A 
  • Alloy 194 C19400 (CuFe2P)
Brass

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:

  • Excellent formability and machinability
  • Good corrosion resistance
  • Attractive aesthetic appearance
  • Cost-effective performance

Applications: Brass alloys are widely used in electrical connectors, terminals, hardware, and decorative applications.

Available grades:

  • CZ101 (CW501L)
  • CZ103 (CW503L)
  • CZ106 (CW505L
  • CuZn30 (CW505L / C26000)
  • CZ107 (CuZn33 / CW506L / C26800)
  • CZ108 (CuZn37 / CW508L / C27200)
  • CW507L (CuZn36)
  • C36000 (CuZn36Pb3)
Phosphor Bronzes

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. 

The alloys in our copper phosphor bronze range offer:

  • High elasticity and spring properties
  • Exceptional fatigue resistance
  • Good electrical conductivity
  • Superior corrosion resistance

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. 

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:

  • CuSN5 (PB 102 / C51000 / CW451K)
  • CuSN6 (PB103 / C51900 / CW452K)
  • CuSn8 (CW451K)
Nickel Silver

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:

  • Distinctive silvery appearance
  • Good corrosion resistance
  • Excellent cold workability
  • Moderate strength

Applications: Nickel Silver is suitable for many applications and can typically be found in electrical contacts, springs, decorative elements, and musical instruments.

Available grades:

  • CW401J (CuNi10Zn27 / C74500 / NS103)
  • CW403J (CuNi12Zn24 / C75700 / NS104)
  • CW409J (CuNi18Zn20 / C76400 / NS106)
  • CW410J (CuNi18Zn27 / C77000 / NS107)
  • Alloy C725 (CuNi9Sn2 / CW351H / C72500)
Cupronickel (Copper Nickel)

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. 

These copper-nickel alloys feature:

  • Exceptional corrosion resistance in marine environments
  • High resistance to biofouling
  • Good thermal conductivity
  • Stable mechanical properties

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:

  • CuNi2  (2.0802 / Alloy 30)
  • CuNi6 (2.0807 / Alloy 60)
  • CuNi10 / IMPHY® CuNi10 / 2.0811
  • CuNi23 / IMPHY® CuNi23 / 2.0881
  • CuNi30Mn (2.0838)
  • CuNi44 (Hecnum / 2.0842)
Beryllium Copper

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. 

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:

  • Exceptional strength (comparable to steel)
  • High electrical and thermal conductivity
  • Excellent fatigue resistance
  • Excellent dimensional stability
  • Non-sparking properties

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

  • CB101 (C17200 1.8% Be/Cu)
  • Alloy 174 (C17410)
  • CuBe2 (C17201 / CW101C / CB101)

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

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:

  • Grade 1
  • Grade 2

Copper Alloy Chemical and Mechanical Composition

Chemical Properties
COPPER ALLOYS CHEMICAL COMPOSITION (% BY WEIGHT)
MATERIAL DESIGNATION EN1652 or AlloyNEAREST FITTYPICAL CHEMICAL COMPOSITION %
Symbol/ NameNumberUNSW.Nr. BS 2870 (Strip) BS 2873 (Wire)CuBeCoFeMnNiPPbSnZnOthersImpurities
COMMERCIALLY PURE HIGH CONDUCTIVITY COPPERS
Cu-ETPCW004AC11000C10199.9 min------0.005 max--Bi: 0.0005 max O: 0.04 max0.03
Cu-ETP1CW003AC11040-99.9 min---------O: 0.005-0.0400.03 (excluding Oâ‚‚ & Ag)
Cu-HCPCW021AC10300C10299.95 min-----0.002 - 0.007-----
Cu-OFCW008AC10200C10399.95 min------0.005--Bi: 0.00050.03
HIGH COPPER ALLOYS
Cu-DHPCW024AC12200C10699.9 min-----0.005 - 0.0130.005---0.03
(Alloy 194)C19400-97.0 min--2.10 - 2.60--0.015 - 0.150.030.05 - 0.2--
BRASS
-CW501L-CZ101Available by Request
-CW503L-CZ103Available by Request
CuZn30CW505LC26000CZ10669.0 - 71.0--0.05-0.3-0.050.1BalanceAl: 0.020.1
CuZn33CW506LC26800CZ10766.0 - 68.0--0.05-0.3-0.050.1BalanceAl: 0.020.1
CuZn36CW507L--Available by Request
CuZn36Pb3-C36000-Available by Request
CuZn37CW508LC27200CZ10862.0 - 64.0--0.1-0.3-0.10.1BalanceAl: 0.050.1
PHOSPHOR BRONZE
CuSn5CW451KC51000PB102Balance--0.1-0.20.01 - 0.40.024.5 - 5.50.2Al: 0.050.2
CuSn6CW452KC51900PB103Balance--0.1-0.20.01 - 0.40.025.5 - 7.00.2Al: 0.050.2
CuSn8CW453K--Balance--≤0.1--0.03-0.35≤0.057.5-8.5≤0.3--
NICKEL SILVER
CuNi10Zn27CW401JC74500NS10361.0 - 64.0--0.30.59.0 - 11.0-0.05-Balance-0.2
CuNi12Zn24CW403JC75700NS10463.0 - 66.0--0.30.511.0 - 13.0-0.030.03Balance-0.2
CuNi18Zn20CW409JC75200NS10660.0 - 63.0--0.30.517.0 - 19.0-0.030.03Balance-0.2
CuNi18Zn27CW410JC77000NS10753.0 - 56.0--0.30.517.0 - 19.0-0.030.03Balance-0.2
CuNi9Sn2 (Alloy 725)CW351HC72500Balance--0.30.38.5 - 10.5-0.031.8 - 2.80.1-0.1
CUPRONICKEL
Alloy 30 (70/30)CuNi2C702002.080298.0----2.0----Trace
Alloy 60 (60/40)CuNi6C705002.080798.0----2.0----Trace
Alloy 90 (90/10)CuNi10C706002.081190.0----10.0----Trace
–CuNi30MnC715002.083875.0---2.023.0----Trace
–CuNi23MnC711002.088167.0---3.030.0----Trace
HecnumCuNi44C721502.084255.0---1.044.0----Trace
BERYLLIUM COPPER ALLOYS
Mechanical Properties (Strip)
MECHANICAL PROPERTIES OF COPPER, BRASS & BRONZE STRIP
MATERIAL DESIGNATION EN1652 or AlloyNEAREST FITMaterial Condition (R Value)Proof Strength 0.2% MPaTensile Strength 0.2% MPaElong. % (50mm Gauge Length)Hardness (VPN)
Symbol/ NameEN NumberUNSBS 2870
HIGH CONDUCTIVITY COPPER
Cu-ETPCW004AC11000C101R220140 Max (≤20.3 ksi)220-260 (31.9–37.7 ksi)33 Min40-65
R240180 Min (≥26.1 ksi)240-360 (34.8–43.5 ksi)8 Min65-95
R290250 Max (≥36.3 ksi)290-360 (42.1–52.2 ksi)4 Min90-110
R360320 Min (≥46.4 ksi)360 Min (≥52.2 ksi)2 Min110 Min
Cu-HCPCW021AC10300C102R220140 Max (≤20.3 ksi)220-260 (31.9–37.7 ksi)33 Min40-65
R240180 Min (≥26.1 ksi)240-360 (34.8–43.5 ksi)8 Min65-95
R290250 Max (≥36.3 ksi)290-360 (42.1–52.2 ksi)4 Min90-110
R360320 Min (≥46.4 ksi)360 Min (≥52.2 ksi)2 Min110 Min
Cu-OFCW008AC26000C103R220140 Max (≤20.3 ksi)220-260 (31.9–37.7 ksi)33 Min40-65
R240180 Min (≥26.1 ksi)240-360 (34.8–43.5 ksi)8 Min65-95
R290250 Max (≥36.3 ksi)290-360 (42.1–52.2 ksi)4 Min90-110
R360320 Min (≥46.4 ksi)360 Min (≥52.2 ksi)2 Min110 Min
HIGH CONTENT COPPER
Cu-DHPCW024AC12200C106R220140 Max (≤20.3 ksi)220-260 (31.9–37.7 ksi)33 Min40-65
R240180 Min (≥26.1 ksi)240-360 (34.8–43.5 ksi)8 Min65-95
R290250 Max (≥36.3 ksi)290-360 (42.1–52.2 ksi)4 Min90-110
R360320 Min (≥46.4 ksi)360 Min (≥52.2 ksi)2 Min110 Min
(Alloy 194)C19400-R300240 Max300-3401680-100
R340240 Min340-3908100-120
R370330 Min370-4306120-140
R420380 Min420-4806130-150
R470440 Min470-5304140-160
R520470 Min520-5803150-165
BRASS
CuZn30CW505LC26000CZ106R270160 Max270-3204055-95
R350170 Min350-4302195-125
R410260 Min410-4909120-155
R480430 Min480 Min-150 Min
CuZn33CW506LC26800CZ107R280170 Max280-3804055-90
R350170 Min350-4302390-125
R420300 min420-5006125-155
R500450 Min500 Min-155 Min
CuZn37CW508LC27200CZ108R300180 Max300-3703855-95
R350170 Min350-4401995-125
R410300 Min410-4908120-155
R480430 Min480-5603150-180
R550500 Min550 Min-170 Min
PHOSPHOR BRONZE
CuSn5CW451KC51000PB102R310250 Max310-3904575-105
R400240 Min400-50014120-160
R490450 Min490-5808160-190
R550520 Min550-6404180-210
R630600 Min630-7203200-230
R690670 Min690 Min-220 Min
CuSn6CW452KC51900PB103R350300 Max350-4204580-110
R420260 Min420-52017125-165
R500450 Min500-5908160-190
R560500 Min560-6505180-210
R640600 Min640-7303200-230
R720690 Min720 Min-220 Min
NICKEL SILVER
CuNi10Zn27CW401JC74500NS103R360230 Max360-4303580-110
R430230 Min430-5108110-150
R490400 Min490-5808150-180
R550480 Min550-640-170-200
R620580 Min620 Min2190 Min
CuNi12Zn24CW403JC75700NS104R360230 Max360-4303580-110
R430230 Min430-5108110-150
R490400 Min490-5808150-180
R550480 Min550-640-170-200
R620580 Min620 Min2190 Min
CuNi18Zn20CW409JC76400NS106R380250 Max380-4502785-115
R450250 Min450-5209115-160
R500410 Min500-5903160-190
R580510 Min580-670-180-210
R640600 Min640-730-200-230
CuNi18Zn27CW410JC77000NS107R390280 Max390-4703090-120
R470280 Min470-54011120-170
R540450 Min540-6303170-200
R600550 Min600-700-190-220
R700660 Min700-8002220-250
CuNi9Sn2 (Alloy 725)CW351HC72500-R340250 Max340-4103070-100
R380200 Min380-4708110-150
R450370 Min450-5304140-170
R500450 Min500-5802160-190
R560520 Min560-650-180-210
CUPRONICKEL
Hecnum / CuNi44-C721502.0842Resistance Wire Grade Only
CuNi30Mn-C715002.0838Resistance Wire Grade Only
CuNi23Mn-C711002.0881Resistance Wire Grade Only
CuNi2 / Alloy 30 (70/30)-C702002.0802Resistance Wire Grade Only
CuNi6 / Alloy 60 (60/40)-C705002.0807Resistance Wire Grade Only
CuNi10 / Alloy 90 (90/10)-C706002.0811Resistance Wire Grade Only
BERYLLIUM COPPER
( Alloy 174 )C17410-172 Hard (Solution Heat Treated, Cold Rolled and Precipitation Hardened at the Mill)410 Min650 Min10180-230
Mechanical Properties (Wire)
MECHANICAL PROPERTIES OF COPPER, BRASS & BRONZES WIRE
Material Designation EN 12166 : 1998Nearest FitMaterial ConditionU.T.S Rm N/mm²Elongation 50 % min;
SymbolNumberUNSBS 2873
COMMERCIALLY PURE COPPER
Cu-ETPCW 004AC 10100C 101Annealed220 – 26033
Cu-ETP1CW003AC11040-Annealed
Cu-OFCW 008AC 10300C 103Annealed220 – 26033
HIGH CONTENT COPPER
Cu-DHPCW024AC12200C106Available by Request
BRASS
-CW501L-CZ101Available by Request
-CW503L-CZ103Availalbe by Request
Cu Zn 30CW 505 LC 26000CZ 106Annealed310 – 41040
1/2 Hard540 – 640
Hard620 – 720
CuZn36CW507L--Available by Request
CuZn36Pb3-C36000-Available by Request
Cu Zn 37CW 508 LC 27200CZ 108Annealed300 – 38035
1/2 Hard560 – 700
Hard700 min
PHOSPHOR BRONZE
Cu Sn 5CW 451 KC 51000PB 102Annealed330 – 42045
1/2 Hard500 – 600
Hard690 – 850
Spring Hard850 min
Cu Sn 6CW 452 KC 51900PB 103Annealed360 – 44060
1/2 Hard530 – 630
Hard740 – 900
Spring Hard900 min
CuSn8CW453K--Available by Request
NICKEL SILVER
Cu Ni 10 Zn 27CW 401 JC 74500NS 103AnnealedAvailable by Request
1/2 HardAvailable by Request
HardAvailable by Request
Cu Ni 12 Zn 24 CW 403 J C 75700NS 104AnnealedAvailable by Request
1/2 HardAvailable by Request
HardAvailable by Request
Cu Ni 18 Zn 20CW 409 JC 75200NS 106AnnealedAvailable by Request
1/2 HardAvailable by Request
HardAvailable by Request

Applications and Features of Copper Alloy Grades

Features and Applications
COPPER ALLOY CHARACTERISTICS AND APPLICATIONS
MATERIAL DESIGNATION BSEN1652 (Strip) BSEN12166 (Wire)NEAREST FITKey FeaturesKey MarketsApplications
Symbol/ NameEN NumberUNSW.Nr. BS 2870 (Strip) BS 2873 (Wire)
PURE COPPER (HIGH CONDUCTIVITY COPPERS)
Cu-ETPCW004AC11000C101Cu-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, ElectricalElectrical Components, Chemical Process Equipment, Radiators, Kitchen Appliances, Conductors, Transformer Windings, Wire: Shapes, Knitting, Braiding, Weaving
Cu-ETP1CW003AC11040-Cu-ETP1 is an enhanced purity Electrolytic Tough Pitch Copper with tighter controls on impurities for superior performance.Aerospace Automotive ElectronicsLead-frames, Conductor wire, Motor windings, Busbars Contact springs, Electrical contacts Slip rings, Electrical components, Electronic connectors, Magnetic wire
Cu-HCPCW021AC10300C102Cu-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, ManufacturingElectrical Contacts & cable Industry, Pressure Vessels
Cu-OFCW008AC10200C103Cu-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, TelecommunicationsPrinted Circuits, Electronic Components, Telecommunication Cables, Conductor, Heat Exchanger, Heat sinks
HIGH COPPER ALLOY
Cu-DHPCW024AC12200C106Cu-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, PlumbingPiping & Fittings, Heat Exchangers, Transistors, Air/Hydraulic/Oil Lines
Alloy 194C19400--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-CZ101Copper 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 applicationsElectronics & Electrical, Automotive, Aerospace, Medical Devices, Industrial EquipmentEMI 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-CZ103Available by Request
CuZn30CW505LC26000CZ106CuZn30 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, DecorativeConnectors, Electronic Components, Jewellery, Model Making, Ferrules, Switches
CuZn33CW506LC26800CZ107CuZn33 is a solid solution strengthened Brass with 33% Zinc, increasing the inclination for stress cracking corrosion compared to CuZn30.Automotive, Electrical EngineeringElectrical Components, Connectors, Clips, Springs
CuZn36CW507L--Available by Request
CuZn36Pb3-C36000-Available by Request
CuZn37CW508LC27200CZ108Considered 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 operationsElectronics, Plumbing, DecorativeElectric Brackets, Springs, Hose Couplings, Clips, Radiator Cores, Contacts, Wire: Knitting and Weaving for RFI Applications
PHOSPHOR BRONZE
CuSn5CW451KC51000PB102CuSn5 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 EngineeringConnectors, Springs, Stamped Parts, Contacts, Wire Shapes, Lock Levers, Switches
CuSn6CW452KC51900PB103Alloy 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 IndustryFlexible Hoses, Springs, Conductive Springs, Contacts, Switches, Brushes
CuSn8CW453K--Available by Request
NICKEL SILVER
CuNi10Zn27CW401JC74500NS103CuNi10Zn27 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, MarineNameplates, Light & Optical Fittings, Door Kicking Plates, Trophies. Springs, Contacts, Model Making, Jewellery
CuNi12Zn24CW403JC75700NS104Similarly 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, MarineRelay Springs, Contact Springs, Connectors, Pressure Membranes, Engraved Name Plates
CuNi18Zn20CW409JC76400NS106CuNi18Zn20 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, DecorativeShielding, Connectors, Relay Springs, Engraved Name Plates, Decorative Purposes, Brush Anchor Wire, Pins, Jewellery
CuNi18Zn27CW410JC77000NS107CuNi18Zn27 provides good corrosion resistance, good formability, and good tarnish resistance. Its colour makes it ideal for decorative purposes.Electronics, Telecommunications, DecorativeShielding, Connectors, Relay Springs, Engraved Name Plates, Decorative Purposes
CuNi9Sn2 (Alloy 725)CW351HC72500-With a good combination of fatigue strength, formability and resistance to corrosion, CuNi9Sn2 (Alloy 725) offering manufacturers many benefits, particularly for electrical components.Telecommunications, ElectronicsCircuit Breaker Components, Relay & Switch Springs, Bellows, Clamps
CUPRONICKEL
Alloy 30 (70/30)CuNi2C702002.0802Characterised by low resistivity, this alloy offers high resistance to oxidation and corrosion. The maximum operating temperature is 300°C.Electronicstube electrical welding fittings, ribbons used for heating of bimetals.
Alloy 60 (60/40)CuNi6C705002.0807Characterised by low resistivity, this alloy offers high resistance to oxidation and corrosion. The maximum operating temperature is 300°C.Electronicstube electrical welding fittings, ribbons used for heating of bimetals.
Alloy 90 (90/10)CuNi10C706002.0811This alloy offers high resistance to oxidation and chemical corrosion. Maximum working temperature is 400°C.Electronicslow value resistors, heating wires and mats.
–CuNi30MnC715002.0838This alloy offers high resistance to oxidation and chemical corrosion. Maximum working temperature is 500°C.Electronicsresistors, heating cords and mats.
–CuNi23MnC711002.0881This alloy offers high resistance to oxidation and chemical corrosion. Maximum working temperature is 500°C.Electronicsresistors, heating cables and detectors for fuses.
HecnumCuNi44C721502.0842Medium resistivity combined with low temperature coefficient of resistance makes this alloy ideal for resistors. It is suitable for temperatures up to 400°C.Electronicsthermocouples, resistors, heating wires and cables.
BERYLLIUM COPPER ALLOYS

Enquire About Copper Alloys in Precision Strip & Wire

Looking for copper alloys in precision strip, sheet or wire? 

Unlock the limitless potential of copper alloys with the Knight Group. Contact us today to discuss your requirements and receive a tailored quotation.

Let our alloys propel your projects to new heights of success.

Use the links below or contact us directly at:

Precision Strip: +44 (0)121 322 8400

Precision Wire: +44 (0)1707 645261

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

    What can we help you with today?*

    How would you like to be contacted?*