Smiths MRO is a sub-divsion of a larger business - Smiths Advanced Metals.
Smiths MRO focuses on raw material support for the global aircraft maintenance, repair and overhaul market. Our business is supported by a broad and diverse stock range with a dedicated team that provides outstanding service levels required for our industry.
431 stainless is a martensitic stainless steel alloy that offers high strength and toughness with good corrosion resistance.
431 stainless represents the most corrosion-resistant of all martensitic products, although resistance is lower than most austenitic alloys. The alloy may be pre-heated to improve welding performance, but the annealed condition is best when considering machining. The alloy offers excellent hardenability and combines high yield and tensile strength.
After heat-treatment, 431 stainless steel bar responds well to nitriding, but this is at the expense of overall corrosion resistance.
Smiths MRO offers the material according to AMS 5628 and other specifications, including 1.4057, MIL-S-18732 and British BS S80. Our 431 stainless round bars are available in stock from 0.25 inches to 6 inches in diameter.
We support the aerospace MRO sector with a broad range of alloys, including Type 431 stainless steel. We stock our products in much closer incremental sizes, which means you will purchase products from us that may not require machining, saving you time and money.
We offer unrivalled services too, by combining our stock portfolio with in-house processing operations and rapid product turnaround on an international basis.
Good corrosion resistance
High yield & tensile strength
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