300 Series (Austenitic) Stainless Steel

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Grade Designation and Composition For Stainless Steel Header

European Designation EN 10088-2 2005 Former BS Standard American European Designations chemical composition (% weight)
Number Name BS 1554 1990 nearest fit AISI nearest fit ASTM UNS nearest fit C (max) Si (max) Mn (max) P (max) S (max) N Cr Ni Mo Others
1.4310 X10 Cr Ni 18-8 302S26 302 S 30100 0.05 – 0.15 2.00 2.00 0.045 0.015 0.11 16.00 – 19.00 6.00 – 9.50
1.4307 X2 Cr Ni 18-9 304S11 304L S 30403 0.03 1.00 2.00 0.045 0.015 0.11 17.50 – 19.50 8.00 – 10.50
1.4301 X5 Cr Ni 18-10 304S31 304 S 30400 0.07 1.00 2.00 0.045 0.015 0.11 17.50 – 19.50 8.00 – 10.50
1.4404 X2 Cr Ni Mo 17-12-2 316S14 316L S 31603 0.03 1.00 2.00 0.045 0.015 0.11 16.50 – 18.50 10.00 – 13.00 2.00 – 2.50
1.4401 X5 Cr Ni Mo 17-12-2 316S42 316 S 31600 0.07 1.00 2.00 0.045 0.015 0.11 16.50 – 18.50 10.00 – 13.00 2.00 – 2.50
1.4541 X6 Cr Ni Ti 18-10 321S31 321 S 32100 0.08 1.00 2.00 0.045 0.015 n/a 17.00 – 19.00 9.00 – 12.00 Ti = 5 x C to 0.70
Mechanical Properties Annealed Stainless Steel Header

European Designation EN 10088-2 2005 Former BS Standard American Maximum tensile strength N/mm²
Number Name BS 1554 1990 nearest fit AISI nearest fit ASTM 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
1.4310 X10 Cr Ni 18-8 302S26 302 S 30100 750 800 880 900
1.4307 X2 Cr Ni 18-9 304S11 304L S 30403 650 750 775 850
1.4301 X5 Cr Ni 18-10 304S31 304 S 30400 700 770 820 870
1.4404 X2 Cr Ni Mo 17-12-2 316S14 316L S 31603 650 750 775 850
1.4401 X5 Cr Ni Mo 17-12-2 316S42 316 S 31600 700 770 820 870
1.4541 X6 Cr Ni Ti 18-10 321S31 321 S 32100 700 770 820 870

Mechanical Properties Cold Drawn Stainless Steel Header

Steel Grade : 1.4310 (302) 1.4401 (316)
Nominal Diameter (mm) Normal tensile strength (NS), min High tensile strength (HS), min Minimum tensile strength N/mm²
less than 0.20 2200 2350 1725
0.20 – 0.30 2150 2300 1700
0.30 – 0.40 2100 2250 1675
0.40 – 0.50 2050 2200 1650
0.50 – 0.65 2000 2150 1625
0.65 – 0.80 1950 2100 1600
0.80 – 1.00 1900 2050 1575
1.00 – 1.25 1850 2000 1550
1.25 – 1.50 1800 1950 1500
1.50 – 1.75 1750 1900 1450
1.75 – 2.00 1700 1850 1400
2.00 – 2.50 1650 1750 1350
2.50 – 3.00 1600 1700 1300
3.00 – 3.50 1550 1650 1250
3.50 – 4.25 1500 1600 1225
4.25 – 5.00 1450 1550 1200
5.00 – 6.00 1400 1500 1150
6.00 – 7.00 1350 1450 1125
7.00 – 8.50 1300 1400 1075
8.50 – 10.00 1250 1350 1050
Applications Header

European Designation EN 10088-2 2005 AISI Nearest fit Service Properties Applications
1.4310 / X10 Cr Ni 18-8 302 Lower Chrome and Nickel content increases the work hardening rate to give high strength and abrasion resistance. Particularly suitable for components requiring stretch forming, high strength or good spring properties. Springs, clips, fasteners, weaving and braiding, orthodontic wires, connectors.
1.4301 X5 Cr Ni 18-10 304 The most popular grade in the austenitic (300) series, exhibiting good corrosion resistance and formability. Ropes, weaving, braiding springs
1.4307 X2 Cr Ni 18-9 304L Reduced Carbon content for better corrosion resistance in welded structures than the base grade 1.4301 (AISI 304). Ropes, weaving, braiding, springs for corrosive environments
1.4401 X5 Cr Ni Mo 17-12-2 316 Molybdenum is added to increase the corrosion resistance. Additionally it has improved non-magnetic properties. Springs, clips, fasteners, weaving, braiding in chemical, petrochemical and marine applications.
1.4404 X2 Cr Ni Mo 17-12-2 316L Reduced Carbon content for better corrosion resistance. As for 316 above, but for more demanding environments.
1.4541 X6 Cr Ni Ti 18-10 321 Titanium is added to oppose chromium carbide precipitation and remove the risk of deteriorating corrosion performance. Fasteners, springs, locking wires, The use of “stabilised” grades is favoured by the aerospace industry, particularly in engine related applications.

Wire Stockists

Knight Precision Wire is part of Knight Group, a group of companies that specialise in the processing and supply of precision metals. Quality is of the utmost importance and Knight Precision Wire operates a vigorous quality management system.

People outside the wire industry may be unaware of the sheer number of wire variations out there. Wire is an essential commodity in numerous sectors and appears in many different forms. Sectors that KPW supply wire for include the Aerospace, Medical, Petrochemical, Industrial and Heat Treatment industries. For the aerospace sector, KPW have been approved as aerospace wire suppliers by Rolls Royce, British Aerospace and Westlands. Two of the primary products supplied to the aerospace industry are locking wire and aerospace cable. You can see case study examples of how the services provided by KPW have benefited the different sectors on the website.

Below is a list of the different wire products offered by KPW :

  • Stainless Steel
  • Carbon Steel
  • Nickel & Nickel Alloys
  • Copper & Copper Alloys
  • Special Wire Materials

Visit the stainless wire product page to see more information about the different stainless wires we produce. To see all of KPW's steel wires products then visit the products page.

In addition to providing wire products to many different companies and sectors, KPW also offer wire processing services. These services include :

  • Cut to Length Wire
  • Flat Wire
  • Square and Shaped Wire
  • Stranding and Bunching
  • Rewinding and Spooling
  • Polishing & Cleaning

To find out how KPW can help you with your special wire needs, send an enquiry using the form on the contact page.