Stainless 431

General

431 is a martensitic stainless combining excellent impact strength at high hardness levels with the best corrosion resistance of any martensitic stainless steels. 431 has been successfully used in a variety of aircraft and general industrial applications. These include fasteners, bolts, valve components and chemical equipment.

Chemical Composition

	C	Mn	Si	Cr	S	P	Fe	Ni
Min %	0.12	–	–	15.00	–	–	Bal.	2.00
Max %	0.20	1.00	1.00	18.00	0.03	0.04	–	3.00
Other Elements

Mechanical Properties

	MPA	%
Tensile Strength.	850 – 1000
Yield Strength (0.2% offset)	635 min
Elongation in 2” (50mm) or 4D		11
Reduction of Area, min
Hardness	248 – 302 BHN

 

Alternative Designations

AISI 431    AMS 5628    ASTM A276    ASTM A473    ASTM A493    ASTM A511    ASTM A579    ASTM A580    DIN 1.4057    MIL S-18732    MIL S-8967    UNS S43100

The data contained in this publication is for informational purposes only and may be revised at any time without prior notice. The data is believed to be accurate and reliable, but Hague Fasteners Limited makes no representation or warranty of any kind (express or implied) and assumes no liability with respect to the accuracy or completeness of the information contained herein. Although the data is believed to be representative of the product, the actual characteristics or performance of the product may vary from what is shown in this publication. Nothing contained in this publication should be construed as guaranteeing the product for a particular use or application.