Stainless steels are a group of steels that contain at least 10.5% chromium. The addition of this element, along with a wide variety of others, generally improves corrosion resistance and mechanical properties at high temperatures making them suitable for a range of arduous applications.
Aerospace stainless steel bar is stocked in a range of both metric and imperial sizes selected to best match current aircraft build programmes. Bars can be supplied to many different end-user approvals either in full lengths or billeted to a size ready for machining operations.
Aerospace steels and stainless steels are defined within British Standards using a designation system within which all grades begin with the letter ‘S’ . Various other designation systems and standards exist although care should be taken as they are not always directly equivalent.
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Nearest Equivalent Specification |
Available Products |
S62
W.Nr
Gen |
1.4014
420S37 |
A martensitic stainless steel similar to type 410 but with an increased carbon content that improved hardness, strength and wear resistance. Corrosion resistance properties are achieved by the addition of >12% chromium and heat treatments. Not often welded but it is possible. |
S80 » |
A heat treatable chromium-nickel 431 type stainless steel in bar form. Has a high chromium content of around 15%. For use aerospace and defence components subject to high stresses up to temperatures of around 400°C. |
W.Nr
AMS
Gen |
1.4044
5628
431S29 |
S124
Gen |
416S37 |
A martensitic type 416 stainless steel containing 12% chromium. Excellent free machining properties due to the addition of sulphur. However, this comes at the cost of reduced corrosion resistance, formability & weldability. |
S130 » |
Austenitic chromium-nickel stainless steel in bar form. Moderate strength and niobium stabilised (347 type) with moderate corrosion resistance. For aerospace and defence components including weldments. |
AMS
Gen
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5646
347S17
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S143 »
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A precipitation hardening stainless steel with high mechanical strength and moderate to good corrosion resistance in a variety of media and is similar to that of basic 300 series stainless steels. Good machinability and weldability. |
FV
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520B
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S144
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A precipitation hardening stainless steel with high strength and moderate to good corrosion resistance. Identical chemical composition as S143 but higher tensile strength achieved through heat treatment. |
S145
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A precipitation hardening stainless steel with high strength and moderate to good corrosion resistance. Identical chemical composition as S143 & S144 but higher tensile strength than both achieved through heat treatment. |
Other Stainless
Steels |
See Aerospace Alloy & Stainless Steel Sheet, Duplex & Super Duplex Stainless Steels, Precipitation Hardening Stainless Steels and Stainless Steels |
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