Stainless Steel 304 (AMS 5513) /304L (AMS 5511)

Technical Data Sheet

Type 304 is a variation of the basic 18-8 grade, Type 304, with a higher chromium and lower carbon content. Lower carbon minimizes chromium carbide precipitation due to welding and its susceptibility to intergranular corrosion. In many instances, it can be used in the ”as-welded“ condition, while Type 304 must be annealed in order to retain adequate corrosion resistance. 

Type 304L is an extra low-carbon variation of Type 304 with a 0.03% maximum carbon content that eliminates carbide precipitation due to welding. As a result, this alloy can be used in the ”as-welded“ condition, even in severe corrosive conditions. It often eliminates the necessity of annealing weldments except for applications specifying stress relief. It has slightly lower mechanical properties than Type 304.

Chemical Composition Limits
Weight% C Si Mn P + S Cr Ni Fe Mo Cu
AMS 5511
0.03 max 1.00 max 2.0 max 0.040 P
0.03 S
18.0 - 20.0 8.0 - 11.00 Bal 0.75 max 0.75 max
AMS 5513
0.08 max 1.00 max 2.0 max 0.040 P
0.03 S
18.0 - 20.0 8.0 - 10.5 Bal 0.75 max 0.75 max

Typical Mechanical Properties


Specification Tensile Strength (ksi)
Yield Strength (ksi) Elongation (%) Reduction of Area Hardness HB
Sheet (Annealed)
AMS 5511
100 max - 40 - -
Sheet (Annealed)
AMS 5513
75 min 30 40 - 202
Bar (Sol Treated)
304 - AMS 5639
75 30 40 50  
Bar (Sol Treated)
304L - AMS 5647
- - - - 140-241

304 is available in Sheet, Strip, Plate, Tube, Bar (Round), Rod, Rings, Forgings. 304 Foil (Shim) is available in various thicknesses. View stock list for further information. Foil Stock List, Sheet Stock List, Plate Stock List. Contact Sales for further availability.

NEW - Aircraft Materials now offers a comprehensive range of high-quality 304 metal powders, produced and tested to exacting standards for use in all processes including Additive Manufacturing (AM), Near-Net Shape Powder Metallurgy (NNS/PS) and Hot-Isostatic Pressing (HIP). Find out more email us with your quality 304 metal powder requirements:

Types 304 Stainless Steel and 304L Stainless Steel are covered by the following specifications:
Type 304 L Vac Melt (AMS 5647, QQ-S-763, ASME SA 479, ASTM A 276, ASTM A 479, ASTM A 484)
AMS 5501 Sheet / strip 125ksi
AMS 5511 Sheet /strip (ann)
AMS 5513 Sheet / strip (ann)
AMS 5560 Seamless tube
AMS 5563 1/4Hd seamless/welded
AMS 5564 1/8Hd seamless/welded
AMS 5565 Welded tube
AMS 5566 Seamless/welded tube
AMS 5567 Seamless/welded tube
AMS 5569 Seamless/ welded tube
AMS 5575 Welded tube
AMS 5639 Bar / Forgings (304)
AMS 5647 Bar / Forgings (304L)
MIL-T-8506 Seamless /welded tube
MIL-T-5695 Seamless / welded tube
MIL-T-6845 Seamless / welded
MIL-T-8504 Seamless/welded tube
MIL-T-6737 Welded tube
ASTM A276 / ASME SA276
ASTM A479 / ASME SA479
ASTM A484 / ASME SA484
ASTM A276 Powder
BS 970; 304S31 / 304S12
WS 1.4306
UNS S30400
UNS S30403

For more information about Alloy 301 for use in medical applications, visit our medical division at

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Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.