Stainless Steel, MartensiticAMS 5628 (7S80D) Bar

Martensitic stainless steel that is the aerospace standard similar to 431 stainless steel.

This alloy is a high chromium-nickel corrosion-resistant martensitic stainless steel. It is extremely corrosion resistant and offers very good strength and toughness. It is typically used in aerospace and defence applications or where higher mechanical properties than 410 are required and where corrosive conditions are not too severe.

The grade is generally supplied in the hardened and tempered condition. This grade is one of the most corrosion resistant grades of martensitic stainless steels, displaying excellent strength and toughness, resistance to stress corrosion and to oxidation up to 800°C.

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Related Specifications

BS 7S80D
431S29
S43100
AMS 5628

Properties

Chemical Composition

Chemical Element	% Present
Carbon (C)	0.12 - 0.17
Chromium (Cr)	15.50 - 16.50
Manganese (Mn)	0.30 - 0.80
Silicon (Si)	0.20 - 0.60
Phosphorous (P)	0.04 max
Sulphur (S)	0.03 max
Nickel (Ni)	2.00 - 3.00
Molybdenum (Mo)	0.25 max
Copper (Cu)	0.50 max
Nitrogen (N)	0.10 max

Mechanical Properties

Mechanical Property	Value
Yield Strength at 0.2% Offset	150 ksi (1034 MPa)
Tensile Strength	200 ksi (1379 MPa)
Elongation in 2 inches or 4D	10%
Reduction of Area	40%

Applications

High strength marine fasteners, bolts and shafts
Various aerospace components including high strength fasteners
Valve parts
Chemical equipment
Bolts and screws

Characteristics

High strength and toughness
Very high corrosion resistance
Resistance to oxidation up to 800°C

Additional Information

Corrosion Resistance

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Disclaimer

This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon. Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed S online) and manufacturers' data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources. Material supplied by the Company may vary significantly from this data but will conform to all relevant and applicable standards. As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied. Advice given by the Company to any third party is given for that party's assistance only and without liability on the part of the Company. All transactions are subject to the Company's current Conditions of Sale. The extent of the Company's liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.