Austenitic Stainless Steel
Versatile alloys providing a durable, high tensile strength, high ductility, low yield stress, corrosion-resistant material solution to manufacturers around the globe
Available in strip and wire
Austenitic Stainless Steel is the most widely used group within the Stainless Steel family of alloys. Alongside excellent corrosion resistance, this non magnetic grade strengthens significantly during cold working and offers good weldability, high strength and ductility. Its chemical and mechanical properties make it the ideal choice for a wide range of applications.
Available Austenitic Precision Grades:
301 / 1.4310 / S 30100
302 / 1.4310 / S 302S26 / S302S31
304 / 1.4301 / S 30400
304L / 1.4307 / S 30403
305 / 1.4303 / S 30500
316 / 1.4401 / 1.4436 / S 31600
316L / 1.4404 / 1.4432 / S 31603
316Ti / 320 / 1.4571/ S 31635
321 / 1.4541 / S 32100
ALLOY 20 / 2.4660 / N08020
904L / 1.4539 / N 08904
Nitronic® 32 Alloy (XM-28) / S24100
Nitronic® 50 (XM-19) / 1.3964 / S 20910
347 / 1.4550 / S 34700
316LVM / 1.4441 / S 31673
303 / 1.4305
205 / S 20500
What are the benefits of using austenitic stainless steel?
Excellent corrosion resistance
Excellent toughness
Superior formability, allowing for the creation of intricate shapes and components
High strength and ductility
Strengthens significantly during cold Working
Good weldability making it ideal for applications that require complex assemblies and fabrications.
Maintains mechanical properties at elevated temperatures, making it suitable for high-temperature applications.
Maintains its strength and ductility at cryogenic temperatures, making it suitable for low-temperature applications.
Non magnetic in its annealed condition, making it an excellent choice for applications that require non magnetic materials
What are the disadvantages of using austenitic stainless steel?
Cannot be hardened by heat treatment and low stress corrosion cracking resistance
Lower Strength in comparison to other stainless steel types like Martensitic or Precipitation Hardening Stainless
Susceptible to stress corrosion cracking, particularly the 300 series when utilised in chloride-rich environments.
The higher nickel content in Austenitic Stainless Steel, especially in the 300 series, can make it more expensive compared to other stainless steel types like Ferritic or 200 series Austenitic Stainless Steel.
High work hardening rate, which can make it challenging to machine and may require specialised equipment and techniques.
Prone to galling, a form of adhesive wear that occurs when sliding surfaces adhere to each other, potentially causing damage during machining or assembly.
Austenitic Stainless Steel Overview
Austenitic Stainless Steel Grades: Experience the Versatility and Corrosion Resistance of the Most Widely-Used Alloys
Austenitic Steel is a non-magnetic form of stainless steel renowned for its exceptional corrosion resistance, formability, and weldability. These alloys possess a range of beneficial chemical and mechanical characteristics and, owing to their versatility, are the most commercially popular alloy group within the Stainless Steel family.
Key Features and Benefits
- Outstanding Corrosion Resistance: Austenitic Stainless Steel grades offer superior corrosion resistance, making them suitable for use in various environments, including high-moisture and high-temperature conditions.
- Excellent Formability: These alloys are known for their exceptional formability, allowing manufacturers to create intricate shapes and components with ease.
- Superior Weldability: Austenitic Stainless Steel grades are easy to weld, making them ideal for applications that require complex assemblies and fabrications.
- High-temperature Performance: These alloys can maintain their mechanical properties at elevated temperatures, making them suitable for high-temperature applications.
- Non-magnetic: Austenitic Stainless Steel grades are non-magnetic, making them an ideal solution for applications that require non-magnetic materials.
Understanding the chemical composition of Austenitic Alloys
Austenitic stainless steels get their name from the high temperature form of Iron with carbon in a solid solution, known as austenite, which is non-magnetic. Traditionally, austenitic stainless steels have an 18% chromium and 8% nickel alloy content, commonly known as 18/8 Stainless. As a group, they have excellent toughness and good formability. By increasing the chromium and nickel content, corrosion resistance will increase. Increasing other elements, such as molybdenum, can further improve corrosion resistance. While Austenitic Stainless Steels are not heat treatable, cold working can improve their mechanical properties, including strength, hardness, and stress resistance.
Common Grades and Applications
Austenitic Stainless Steel grades include the popular 301 / 1.4310, 304 / 1.4301, 304L / 1.4307, 316 / 1.4401 / 1.4436, and many others. These grades are commonly used in a variety of industries, such as aerospace, automotive, food and beverage, chemical processing, and construction
300 Austenitic series vs 200 Austenitic series
Austenitic Stainless Steels has two main subgroups, the 300 Austenitic series and the 200 Austenitic series. The primary difference between these two series is the composition of the alloys. The 200 series consists of Austenitic Chromium-Nickel-Manganese alloys, whereas the 300 series is composed of Austenitic Chromium-Nickel alloys. 200 series Stainless Steels achieve their Austenitic structure primarily through the addition of manganese and nitrogen, with a lower nickel content. This makes the 200 series a cost-effective alternative to the 300 series, which relies more on nickel for its Austenitic structure. However, the 200 series stainless steels are more susceptible to delayed cold cracking after forming.
While both 200 and 300 series steels not magnetic in the annealed condition, they can become slightly magnetic when cold-worked. The 300 series stainless steels are considered to have overall better corrosion resistance.
The Austenitic 300 Series Alloys are the most common choice for manufacturers because of the impressive range of mechanical properties possible by altering alloying levels. In the fully annealed condition, they are essentially non-magnetic. Nonetheless, cold working of the less alloyed grades will induce structural changes leading to increased levels of magnetism. Grades with a lower carbon content are identifiable with the addition of the “L” after their name. The cost of 300 Series grades fluctuates due to the availability and cost of nickel.
Knight Group’s Expertise in Austenitic Stainless Steel Grades
Knight Group is your trusted partner for sourcing and utilising Austenitic Stainless Steel grades in precision strip and wire. Our extensive inventory and in-depth knowledge of these alloys ensure we can provide you with the ideal material for your specific application. Rely on Knight Group’s expertise to help you make the most of these versatile and corrosion-resistant alloys.
Take the Next Step: Unlock the Potential of Austenitic Stainless Steel Grades
Discover how Austenitic Stainless Steel grades can revolutionise your manufacturing process with their unbeatable combination of corrosion resistance, formability, and weldability. Contact the Knight Group today to learn more about our range of Austenitic Stainless Steel alloys and how we can help you harness their full potential.
Chemical Properties of Austenitic Stainless Steel
| AUSTENITIC STAINLESS STEEL CHEMICAL COMPOSITION | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| European Designation EN 10088-2 2014 | Former BS Standard (Wire Only) | American Designation (ASTM) | TYPICAL CHEMICAL COMPOSITION % | ||||||||||||
| Number | Name | BS 1554 1990 nearest fit | AISI nearest fit | UNS nearest fit | C | Si | Mn | P | S | Cr | Mo | Ni | N | Cu | Other |
| AUSTENITICS | |||||||||||||||
| - | - | - | 205 | S 20500 | Available by Request | ||||||||||
| 1.4310 | X10CrNi18-8 | - | 301 | S 30100 | 0.05 - 0.15 | 1.00 - 2.00 | 2.0 | 0.045 | 0.015 - 0.030 | 16.00 - 19.00 | 0.8 | 6.0 - 9.5 | 0.10 | - | - |
| 1.4310 | X10 Cr Ni 18-8 | 302S26 | 302 | S 30100 | 0.05 – 0.15 | 2.0 | 2.0 | 0.045 | 0.015 | 16.00 – 19.00 | - | 6.00 – 9.50 | 0.11 | - | |
| 1.4305 | X8CrNiS18-9 | 303S31 | 303 | - | Available by Request | ||||||||||
| 1.4301 | X5 Cr Ni 18-10 | 304S31 | 304 | S 30400 | 0.07 | 1.0 | 2.0 | 0.045 | 0.015 | 17.5 - 19.5 | - | 8.0 - 10.5 | 0.10 | - | - |
| 1.4307 | X2 Cr Ni 18-9 | 304S11 | 304L | S 30403 | 0.03 | 1.0 | 2.0 | 0.045 | 0.015 | 17.5 - 19.5 | - | 8.0 - 10.5 | 0.10 | - | - |
| 1.4303 | X4 Cr Ni 18-12 | - | 305 | S 30500 | 0.06 | 1.0 | 2.0 | 0.045 | 0.015 | 17.0 - 19.0 | - | 11.0 - 13.0 | 0.10 | - | - |
| 1.4401 | X5 Cr Ni Mo 17-12-2 | 316S42 | 316 | S31600 | 0.07 | 1.0 | 2.0 | 0.045 | 0.015 | 16.5 - 18.5 | 2.0 - 2.5 | Strip: 10.5 - 13.5 Wire: 10.0 – 13.0 | Strip: 0.1 Wire: 0.11 | - | - |
| 1.4436 | X3 Cr Ni Mo17-13-3 | - | 316 | S31600 | 0.05 | 1.0 | 2.0 | 0.045 | 0.015 | 16.5 - 18.5 | 2.5 - 3.0 | 10.5 - 13.0 | 0.1 | - | - |
| 1.4404 | X2 Cr Ni Mo 17-12-2 | 316S14 | 316L | S 31603 | 0.03 | 1.0 | 2.0 | 0.045 | 0.015 | 16.5 - 18.5 | 2.0 - 2.5 | 10.0 - 13.0 | Strip 0.1 Wire: 0.11 | - | - |
| 1.4432 | X2 Cr Ni Mo 17-12-3 | - | 316L | S 31603 | 0.03 | 1.0 | 2.0 | 0.045 | 0.015 | 16.5 - 18.5 | 2.5 - 3.0 | 10.5 - 13.0 | 0.1 | - | - |
| 1.4441 | - | - | 316LVM | S 31673 | Available by Request | ||||||||||
| 1.4571 | X6 Cr Ni Mo Ti 17-12-2 | - | 316Ti | S 31635 | 0.08 | 1.0 | 2.0 | 0.045 | 0.015 | 16.5 - 18.5 | 2.0 - 2.5 | 10.5 - 13.5 | - | - | Ti 5 x C to max 0.7 |
| 1.4541 | X6 Cr Ni Ti 18-10 | 321S31 | 321 | S 32100 | 0.08 | 1.0 | 2.0 | 0.045 | 0.015 | 17.0 - 19.0 | - | 9.0 - 12.0 | - | - | Ti 5 x C to max 0.7 |
| 1.4550 | X6 Cr Ni Nb 18-10 | - | 347 | S 34700 | 0.08 | 1.0 | 2.0 | 0.045 | 0.015 | 17.0 - 19.0 | - | 9.0 - 12.0 | - | - | Nb (Cb) = 10 x C to max 1.0 |
| 1.4539 | X1 NI Cr Mo Cu 25-20-5 | - | 904L | N 08904 | 0.02 | 0.7 | 2.0 | 0.03 | 0.01 | 19.0 - 21.0 | 4.0 - 5.0 | 24.0 - 26.0 | 0.15 | 1.2 - 2.0 | - |
| 2.4660 | NiCr20CuMo | - | Alloy 20 | N08020 | 0.07 | 1.0 | 2.0 | 0.045 | 0.035 | 19.00 - 21.00 | 2.00 - 3.00 | 32.00 - 38.00 | - | 3.00 - 4.00 | Nb+Ta: 8 x carbon - 1.00 Fe: balance |
| - | - | - | Nitronic® 32 Alloy (XM-28) | S24100 | 0.15 | 0.03 | 11.0 -14.00 | 0.06 | 0.03 | 16.50 – 19.0 | - | 0.50 – 2.50 | 0.20 – 0.45 | - | Fe: Balance |
| 1.3964 | - | - | Nitronic® 50 (XM-19) | S20910 | 0.06 | 1.0 | 4.0 – 6.0 | 0.04 | 0.03 | 20.5 – 23.5 | 1.5 – 3.0 | 11.50 – 13.50 | - | - | V: 0.1 – 0.3 Fe: balance |
| HEAT RESISTING AUSTENITICS | |||||||||||||||
| 1.4828 | - | - | 309 | S 30900 | 0.08 | 0.75 | 2.0 | 0.045 | 0.03 | 22.00 - 24.00 | - | 12.00 - 15.00 | - | - | - |
| 1.4833 | X12 Cr Ni 23-13 | - | 309S | S 30908 | 0.08 - 0.15 | 1.0 | 2.0 | 0.045 | 0.015 - 0.030 | 22.00 - 24.00 | - | 12.00 - 15.00 | 0.11 | - | - |
| 1.4845 | X8 Cr Ni 25-21 | - | 310/ 310S | S 31008 | 0.08 - 0.10 | 1.5 | 2.0 | 0.045 | 0.015 - 0.030 | 24.00 - 26.00 | - | 19.00 - 22.00 | 0.11 | - | - |
| SUPER AUSTENITICS | |||||||||||||||
| 1.4547 | X1CrNiMoCuN20–18–7 | - | 254 SMO® | S31254 | 0.02 | 0.7 | 1.0 | 0.03 | 0.01 | 19.5 - 20.5 | 6.0 - 7.0 | 17.5 - 18.5 | 0.18 - 0.25 | 0.5 - 1.0 | - |
| - | - | - | AL6XN | N08367 | 0.03 max | 1.0 max | 2.0 max | 0.04 max | 0.03 max | 20.0 – 22.0 | 6.00 – 7.00 | 23.5. – 25.5 | 0.18 – 0.25 | 0.75 max | Fe: Balance |
| 1.4529 | - | - | INCOLOY® 25-6MO Alloy | N08926 | 0.02 | 0.5 | 2.0 | 0.03 | 0.01 | 19.0 – 21.0 | 6.0 – 7.0 | 24.0 – 26.0 | 0.15 – 0.25 | 0.5 – 1.5 | Fe: Balance |
Mechanical Properties of Austenitic Stainless Steel (Strip)
| AUSTENITIC STAINLESS STEEL STRIP MECHANICAL PROPERTIES | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| European Designation EN 10088-2 2014 | Former BS Standard (Wire Only) | American Designation (ASTM) | Proof Strength 0.2% Min (N/mm2) | Tensile Strength | Elong. % Min. (50mm Gauge Length) | Hardness Max (VPN) | Surface Finish | ||
| Number | Name | BS 1554 1990 nearest fit | AISI nearest fit | UNS nearest fit | |||||
| AUSTENITICS | |||||||||
| - | - | - | 205 | S 20500 | Not available in strip. Wire products are available. | ||||
| 1.4310 | X10CrNi18-8 | - | 301 | S 30100 | 195 | 500 - 750 | 40 | 242 | 2B & 2R |
| 1.4310 | X10 Cr Ni 18-8 | 302S26 | 302 | S 30100 | Not available in strip. Wire products are available. | ||||
| 1.4305 | X8CrNiS18-9 | 303S31 | 303 | - | Not available in strip. Wire products are available. | ||||
| 1.4301 | X5 Cr Ni 18-10 | 304S31 | 304 | S 30400 | 190 | 500 - 700 | 45 | 226 | 2B & 2R |
| 1.4307 | X2 Cr Ni 18-9 | 304S11 | 304L | S 30403 | 175 | 500 - 700 | 45 | 226 | 2B & 2R |
| 1.4303 | X4 Cr Ni 18-12 | - | 305 | S 30500 | 190 | 500 - 700 | 45 | 226 | 2B & 2R |
| 1.4401 | X5 Cr Ni Mo 17-12-2 | 316S42 | 316 | S31600 | 200 | 500 - 700 | 40 | 226 | 2B & 2R |
| 1.4436 | X3 Cr Ni Mo17-13-3 | - | 316 | S31600 | 200 | 500 - 700 | 40 | 226 | 2B & 2R |
| 1.4404 | X2 Cr Ni Mo 17-12-2 | 316S14 | 316L | S 31603 | 200 | 500 - 700 | 40 | 226 | 2B & 2R |
| 1.4432 | X2 Cr Ni Mo 17-12-3 | - | 316L | S 31603 | Available on request. | 40 | 226 | 2B & 2R | |
| 1.4441 | - | - | 316LVM | S 31673 | Not available in strip. Wire products are available. | ||||
| 1.4571 | X6 Cr Ni Mo Ti 17-12-2 | - | 316Ti | S 31635 | 200 | 500 - 700 | 40 | 226 | 2B & 2R |
| 1.4541 | X6 Cr Ni Ti 18-10 | 321S31 | 321 | S 32100 | 190 | 500 - 700 | 40 | 226 | 2B & 2R |
| 1.4550 | X6 Cr Ni Nb 18-10 | - | 347 | S 34700 | 205 | 510 - 740 | 40 | 242 | 2B & 2R |
| 1.4539 | X1 NI Cr Mo Cu 25-20-5 | - | 904L | N 08904 | 230 | 530 - 730 | 35 | 242 | 2B & 2R |
| 2.4660 | NiCr20CuMo | - | Alloy 20 | N08020 | 241 | 551 | 30 | 200 | 2B & 2R |
| - | - | - | Nitronic® 32 Alloy (XM-28) | S24100 | Not available in strip. Wire products are available. | ||||
| 1.3964 | - | - | Nitronic® 50 (XM-19) | S20910 | Not available in strip. Wire products are available. | ||||
| HEAT RESISTING AUSTENITICS | |||||||||
| 1.4547 | X1CrNiMoCuN20–18–7 | - | 254 SMO® | S31254 | 320 | 650 - 850 | 35 | Available on request. | |
| - | - | - | AL6XN | N08367 | Available on request. | ||||
| 1.4529 | - | - | INCOLOY® 25-6MO Alloy | N08926 | Not available in strip. Wire products are available. | ||||
| SUPER AUSTENITICS | |||||||||
| 1.4547 | X1CrNiMoCuN20–18–7 | - | 254 SMO® | S31254 | 320 | 650 - 850 | 35 | Available on request. | |
| - | - | - | AL6XN | N08367 | Available on request. | ||||
| 1.4529 | - | - | INCOLOY® 25-6MO Alloy | N08926 | Not available in strip. Wire products are available. | ||||
Mechanical Properties of Austenitic Stainless Steel (Wire)
| AUSTENITIC STAINLESS STEEL WIRE MECHANICAL PROPERTIES | ||||||||
|---|---|---|---|---|---|---|---|---|
| European Designation EN 10088-2 2014 | Former BS Standard (Wire Only) | American Designation (ASTM) | Maximum tensile strength N/mm² | |||||
| Number | Name | BS 1554 1990 nearest fit | AISI nearest fit | UNS nearest fit | Wire dia 13.0 – 6.0mm | Wire dia 6.00 – 1.50mm | Wire dia 1.50 – 0.50mm | Wire dia 0.50 – 0.10mm |
| AUSTENITICS | ||||||||
| - | - | - | 205 | S 20500 | Available on request. | |||
| 1.4310 | X10CrNi18-8 | - | 301 | S 30100 | 195 | 500 - 750 | 40 | 242 |
| 1.4310 | X10 Cr Ni 18-8 | 302S26 | 302 | S 30100 | Available on request. | |||
| 1.4305 | X8CrNiS18-9 | 303S31 | 303 | - | Available on request. | |||
| 1.4301 | X5 Cr Ni 18-10 | 304S31 | 304 | S 30400 | 190 | 500 - 700 | 45 | 226 |
| 1.4307 | X2 Cr Ni 18-9 | 304S11 | 304L | S 30403 | 175 | 500 - 700 | 45 | 226 |
| 1.4303 | X4 Cr Ni 18-12 | - | 305 | S 30500 | 190 | 500 - 700 | 45 | 226 |
| 1.4401 | X5 Cr Ni Mo 17-12-2 | 316S42 | 316 | S31600 | 200 | 500 - 700 | 40 | 226 |
| 1.4436 | X3 Cr Ni Mo17-13-3 | - | 316 | S31600 | 200 | 500 - 700 | 40 | 226 |
| 1.4404 | X2 Cr Ni Mo 17-12-2 | 316S14 | 316L | S 31603 | 200 | 500 - 700 | 40 | 226 |
| 1.4432 | X2 Cr Ni Mo 17-12-3 | - | 316L | S 31603 | 200 | 500 - 700 | 40 | 226 |
| 1.4441 | - | - | 316LVM | S 31673 | Available on request. | |||
| 1.4571 | X6 Cr Ni Mo Ti 17-12-2 | - | 316Ti | S 31635 | 200 | 500 - 700 | 40 | 226 |
| 1.4541 | X6 Cr Ni Ti 18-10 | 321S31 | 321 | S 32100 | 190 | 500 - 700 | 40 | 226 |
| 1.4550 | X6 Cr Ni Nb 18-10 | - | 347 | S 34700 | 205 | 510 - 740 | 40 | 242 |
| 1.4539 | X1 NI Cr Mo Cu 25-20-5 | - | 904L | N 08904 | 230 | 530 - 730 | 35 | 242 |
| 2.4660 | NiCr20CuMo | - | Alloy 20 | N08020 | 241 | 551 | 30 | 200 |
| - | - | - | Nitronic® 32 Alloy (XM-28) | S24100 | Available on request. | |||
| 1.3964 | - | - | Nitronic® 50 (XM-19) | S20910 | Available on request. | |||
| HEAT RESISTING AUSTENITICS | ||||||||
| 1.4828 | - | - | 309 | S 30900 | Available on request. | |||
| 1.4833 | X12 Cr Ni 23-13 | - | 309S | S 30908 | 210 | 500 - 700 | 33 | 192 |
| 1.4845 | X8 Cr Ni 25-21 | - | 310/ 310S | S 31008 | 210 | 500 - 700 | 33 | 192 |
| SUPER AUSTENITICS | ||||||||
| 1.4547 | X1CrNiMoCuN20–18–7 | - | 254 SMO® | S31254 | 320 | 650 - 850 | 35 | Available on request. |
| - | - | - | AL6XN | N08367 | Available on request. | |||
| 1.4529 | - | - | INCOLOY® 25-6MO Alloy | N08926 | Available on request. | |||
Features and Applications of Austenitic Stainless Steel Alloys
| Austenitic Stainless Steel Material Features and Applications | |||||||
|---|---|---|---|---|---|---|---|
| European Designation EN 10088-2 2014 | Former BS Standard (Wire Only) | American Designation (ASTM) | Key Features | Key Markets | Applications | ||
| Number | Name | BS 1554 1990 nearest fit | AISI nearest fit | UNS nearest fit | |||
| AUSTENITICS | |||||||
| - | - | - | 205 | S 20500 | Available by Request | ||
| 1.4310 | X10CrNi18-8 | - | 301 | S 30100 | An Austenitic Nickel-Chrome alloy with high toughness and corrosion resistance. 301 (1.4310) has lower chromium and nickel content compared to the 304 (1.4301), increasing its work hardening range. In annealed form it is non magnetic, but can develop magnetic properties, high strengths and ductility through cold working. It has good surface brightness, making it useful for decorative applications. | Aerospace, Automotive, Chemical Processing, Transport, Springs and Pressings, Decorative Goods, Etching | aircraft structural parts, automotive parts including trims and wheel covers springs, pressings, connectors, gaskets, watch parts, chemically etched components, building tools, decorative purposes, tableware, appliances, computer components, stamped parts |
| 1.4310 | X10 Cr Ni 18-8 | 302S26 | 302 | S 30100 | The lower Chrome and Nickel content of this grade increases the work hardening rate to give high strength and abrasion resistance. However, it is not hardenable by heat treatment. In the annealed condition it is non magnetic, but will slowly become magnetic with cold working. It is particularly suitable for components requiring stretch forming, high strength or good spring properties. | Medical, Springs and Pressings, Electronics | springs, clips, wireforms, fasteners, weaving and braiding, orthodontic wires, electrical connectors, washers, |
| 1.4305 | X8CrNiS18-9 | 303S31 | 303 | - | Available by Request | ||
| 1.4301 | X5 Cr Ni 18-10 | 304S31 | 304 | S 30400 | The most common grade of Stainless Steel due to its versatility. It has a high nickel content to increase strength, hardness and ductility. Its popularity can it part be attributed to this alloy's superior formability, welding and deep drawing properties. A high chromium content also provides excellent corrosion resistance in oxidizing environments and moderate protection in some acidic conditions. High hardness and strength can be achieved through cold working. Although a non-magnetic grade, magnetic properties can arise through cold working. | Food, Medical, Automotive, Cryogenic, Springs & Pressings, Pharmaceutical | heat exchangers, bellows, flexible tube, pipes, hinges, clamps surgical instruments, hypodermic needles, cryogenic components, air bag sensors, domestic appliances, gaskets, kitchen wares, springs, thread fasteners, sinks, computer components, battery cases, window spacers, architectural panels, ropes, weaving, braiding springs, severely deep drawn applications |
| 1.4307 | X2 Cr Ni 18-9 | 304S11 | 304L | S 30403 | The low Carbon version of 304 (1.4301) is ideal for more corrosive environments with oxidation resistance to a maximum temperature of 899°C (1650°F) without appreciable scaling. It offers greater resistance to intergranular corrosion in welds and moderate pitting corrosion resistance. It has good welding characteristics, though other grades are better suited for applications specifying stress relief. | Medical, Automotive, Springs and Pressings | surgical and medical parts, water tubes for electric heaters, bellows, pressings, deep drawn parts, expanded mesh, ropes, weaving, braiding, springs for corrosive environments. |
| 1.4303 | X4 Cr Ni 18-12 | - | 305 | S 30500 | An Austenitic Stainless Steel with good corrosion resistance. It has capability for polishing and electroplating, as well as soldering and welding. It has good cold workability and low rate of work hardening that suits deep drawn applications. It is non magnetic but can become magnetic (at a slow rate) with increasing cold work. | Electronics, Stationary | electronic parts, deep drawn parts, battery cases, pens |
| 1.4401 | X5 Cr Ni Mo 17-12-2 | 316S42 | 316 | S31600 | Molybdenum is added to increase corrosion resistance, with higher resistance to pitting and crevice corrosion in chloride environments than other common austenitic grades. Excellent welding and formability characteristics. Good for applications requiring continuous work in a temperature range of 450°C (842°F) and 850°C (1562°F). Additionally, it has improved non-magnetic properties. | Chemical Processing, Petrochemical, Automotive, Marine, Food | bursting discs, seals, bellows, gaskets, expansion joints, explosion panels, tubes, diaphragms, heat exchangers, coastal architectural features, food and laboratory benches, clips, threaded fasteners, springs, boat fittings, chemical containers, weaving, braiding in chemical, petrochemical and marine applications |
| 1.4436 | X3 Cr Ni Mo17-13-3 | - | 316 | S31600 | Molybdenum is added to increase corrosion resistance, with higher resistance to pitting and crevice corrosion in chloride environments than other common austenitic grades. Excellent welding and formability characteristics. Good for applications requiring continuous work in a temperature range of 450°C (842°F) and 850°C (1562°F). Additionally, it has improved non-magnetic properties. | Chemical Processing, Petrochemical, Automotive, Marine, Food | bursting discs, seals, bellows, gaskets, expansion joints, explosion panels, tubes, diaphragms, heat exchangers, coastal architectural features, food and laboratory benches, clips, threaded fasteners, springs, boat fittings, chemical containers, weaving, braiding in chemical, petrochemical and marine applications |
| 1.4404 | X2 Cr Ni Mo 17-12-2 | 316S14 | 316L | S 31603 | The Low Carbon version of 316 (1.4401), offers better corrosion resistance and is better suited for uses at sensitization temperatures, such as welding, as intergranular corrosion resistance is increased. Slightly more corrosion resistant than 316 (1.4401). More heavily alloyed, this grade has excellent corrosion resistance in Food, Beverage and Agricultural applications. | Chemical Processing, Petrochemical, Automotive, Marine, Food, Agricultural | bursting discs, seals, bellows, gaskets, expansion joints, explosion panels, tubes, diaphragms, heat exchangers, coastal architectural features, food and laboratory benches, threaded fasteners, springs, boat fittings, chemical containers |
| 1.4432 | X2 Cr Ni Mo 17-12-3 | - | 316L | S 31603 | The Low Carbon version of 316 (1.4401), offers better corrosion resistance and is better suited for uses at sensitization temperatures, such as welding, as intergranular corrosion resistance is increased. Slightly more corrosion resistant than 316 (1.4401). More heavily alloyed, this grade has excellent corrosion resistance in Food, Beverage and Agricultural applications. | Chemical Processing, Petrochemical, Automotive, Marine, Food, Agricultural | bursting discs, seals, bellows, gaskets, expansion joints, explosion panels, tubes, diaphragms, heat exchangers, coastal architectural features, food and laboratory benches, threaded fasteners, springs, boat fittings, chemical containers |
| 1.4441 | - | - | 316LVM | S 31673 | Available by Request | ||
| 1.4571 | X6 Cr Ni Mo Ti 17-12-2 | - | 316Ti | S 31635 | The Titanium-stabilised version of 316 (1.4401), prevents intergranular corrosion of welded structures by preventing formation of Chromium Carbide. The addition of Titanium offers improved mechanical strength at temperatures above 600°C (1112°F). | Chemical Processing, Petrochemical, Marine, Food | bursting discs, seals, bellows, gaskets, expansion joints, explosion panels, tubes, diaphragms, heat exchangers, coastal architectural features, food and laboratory benches, threaded fasteners, springs, boat fittings, chemical containers |
| 1.4541 | X6 Cr Ni Ti 18-10 | 321S31 | 321 | S 32100 | This alloy benefits from added Titanium to reduce Chromium Carbide precipitation, providing increased protection against intergranular corrosion. This alloy also combines high strength, resistance to scaling and phase stability with resistance to subsequent aqueous corrosion. With excellent welding and forming capabilities, it is particularly useful for parts fabricated by welding that cannot subsequently be annealed and applications in the temperature range of up to 900°C (1652°F). | Aerospace, Automotive | heating systems, welded tubes, gaskets, profile pipes, expansion joints, seals, bellows gaskets, furnace parts, honeycomb seals, thermal insulation, tube, flexible tube, diaphragms, aerospace components, exhaust manifolds, fasteners, springs, locking wires |
| 1.4550 | X6 Cr Ni Nb 18-10 | - | 347 | S 34700 | With similar characteristics to alloy 304 (1.4301), the addition of Niobium (Columbium) gives this alloy excellent resistance to intergranular corrosion. This grade is ideally suited where parts are required to operate in service between 426.7°C (800°F) - 871.1°C (1600°F) | Aerospace, Automotive Oil & Gas, Paper & Pulp | aircraft parts, expansion joints, bellows, flexible hoses, seals, gaskets and shims, thermal insulation panels, distillation, column packing, fasteners, aircraft exhaust stacks, oil refinery equipment, firewalls, stack liners, heavy duty automotive exhausts, springs |
| 1.4539 | X1 NI Cr Mo Cu 25-20-5 | - | 904L | N 08904 | This low Carbon Austenitic Stainless Steel is alloyed with Copper to improve resistance in acidic conditions. However the use of more expensive alloying components, Molybdenum and Nickel, it has largely been replaced by lower cost Duplex alloys. 904L (1.4539) is non-magnetic, and offers excellent formability, toughness and weldability. | Oil & Gas, Paper & Pulp | seals, gaskets and shims, thermal insulation panels, distillation, column packing |
| 2.4660 | NiCr20CuMo | - | Alloy 20 | N08020 | Alloy 20 offers excellent corrosion resistance, particularly in acidic environments, including phosphoric, sulfuric, and nitric acids. It can also resist stress corrosion cracking in chloride-rich environments due to alloying additions. It can be fabricated and welded using conventional processes while maintaining its resistance to pitting and crevice corrosion. | Chemical Processing, Food Processing, Oil & Gas | extraction columns, heat exchangers, mixing tanks, pipes, pumps, valves, food processing equipment, springs |
| - | - | - | Nitronic® 32 Alloy (XM-28) | S24100 | NITRONIC 32® (XM-28) is a low nickel austenitic stainless steel often selected as an alternative to 304 (1.4301) stainless steel when higher strength and comparable corrosion resistance is necessary. The alloy’s high work hardening rate allows for increased strength while maintaining ductility. NITRONIC 32® can be readily hot worked or cold worked, with annealing recommended after severe cold forming. | Chemical Processing, Food Processing, Electric Power Distribution, Construction | wire forms, racks/cages, screens, springs, concrete reinforcement, pole line hardware |
| 1.3964 | - | - | Nitronic® 50 (XM-19) | S20910 | Nitronic® 50 is a austenitic stainless steel strengthened by nitrogen, offering improved corrosion resistance and higher strength than many other austenitic stainless steel grades. Nitronic® 50 is non-magnetic and unlike some other austenitic grades, does not gain magnetic properties even when cold-worked or at sub-zero temperatures. It is ideal for sea water environments due to good resistance to pitting and crevice corrosion. | Marine, Oil & Gas, Medical | springs, valves, marine hardware, and boat shafting |
| HEAT RESISTING AUSTENITICS | |||||||
| 1.4828 | - | - | 309 | S 30900 | Alloy 309 (1.4828) is a heat resisting stainless steel grade with excellent resistance to oxidation as well as high tensile and creep strengths at elevated temperatures. It offers higher strength and corrosion resistance that 304 (1.4301) and its strength and hardness can be increased further by cold working. After cold working, annealing will help to reduce internal stress. | Automotive, Aerospace, Energy, Chemical Processing, Cement, Paper and Pulp | aerospace engine parts, gas burner radiators, electrical heating element tubes, energy conversion plants, furnace parts, heat exchangers, automotive exhausts, paper mills, waste incinerators |
| 1.4833 | X12 Cr Ni 23-13 | - | 309S | S 30908 | Considered a heat resisting alloy, the low Carbon version of 309 (1.4828), has improved weldability and minimised carbide precipitation. This alloys provides good resistance to oxidation and high-temperature corrosion combined with good mechanical strength at elevated temperatures. However it is not suited for use in highly carburizing environments. | Automotive, Aerospace, Energy, Chemical Processing, Cement, Paper and Pulp | aerospace engine parts, gas burner radiators, electrical heating element tubes, energy conversion plants, furnace parts, heat exchangers, automotive exhausts, paper mills |
| 1.4845 | X8 Cr Ni 25-21 | - | 310/ 310S | S 31008 | This alloy is a heat resistant Austenitic Stainless Steel, offering high toughness and superior high-temperature oxidation resistance due to its high Chromium and Nickel content. With excellent toughness to temperatures as low as -267.8°C (-450 °F), this grade has cryogenic applications. | Petrochemical Industry, Food Industry, Cryogenic, Power Generation | nuclear thermal insulation, furnaces, air heaters, food processing components, cryogenic applications |
| SUPER AUSTENITICS | |||||||
| 1.4547 | X1CrNiMoCuN20–18–7 | - | 254 SMO® | S31254 | Often regarded as a cost effective alternative to high nickel content and titanium alloys, 254 SMO® (1.4547) is a high-alloy super-austenitic stainless steel developed for use in seawater and other aggressive chloride-bearing environments. With a combined high molybdenum and nitrogen content alongside low carbon content, this grade offers exceptional resistance to pitting, crevice corrosion stress cracking, and corrosion fatigue uniform corrosion. 254 SMO® (1.4547) possesses strength that is twice that of the 300 series stainless steels. | Marine, Chemical Processing, Food Processing, Oil & Gas, Power Generation, Pharmaceutical | desalination equipment, saltwater handling, flue gas desulfurization, food processing equipment, heat exchangers, pulp mill bleach systems, and oil distillation |
| - | - | - | AL6XN | N08367 | Designed for seawater resistance, this alloy exceeds the performance of conventional duplex stainless steels. It is capable of withstanding other corrosive environments, including chloride and oxidizing media. It can also be a lower a lower-cost alternative when compared with other nickel-base alloys. | Marine, Chemical Processing, Oil & Gas, Nuclear Power Generation, Paper and Pulp, Food Processing | mixing tanks, heat exchangers, extraction/distillation columns, flue gas scrubbers, pipes, pumps, food processing equipment, caustic chloride systems, pulp/paper production, desalination equipment |
| 1.4529 | - | - | INCOLOY® 25-6MO Alloy | N08926 | This alloy is a super-austenitic stainless steel, resistant to a wide range of corrosive environments. Additions of molybdenum and nitrogen provide added protection from pitting and crevice corrosion, while copper offers resistance to sulfuric acid conditions. It offers improved performance compared to 316 (1.4401) stainless steel, while remaining a cost-effective alternative to other nickel-based alloy grades. | Chemical Processing, Oil & Gas, Nuclear Power Generation, Food Processing, Springs | marine/offshore platform equipment, desalination equipment, heat exchangers, pipes, paper processing equipment, caustic chloride systems, springs |
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