SUS431 Stainless Steel: High-Strength Martensitic Alloy

Grade		C	Mn	Si	P	S	Cr	Ni
431	min. max.	- 0.20	- 1	- 1	- 0.04	- 0.03	15 17	1.25 2.50

Mechanical Properties

Table 2. Mechanical properties of grade 431 stainless steels

Tempering Temperature (°C)	Tensile Strength (MPa)	Yield Strength 0.2% Proof (MPa)	Elongation (% in 50mm)	Hardness Brinell (HB)	Impact Charpy V (J)
Annealed *	862	655	20	285 max	-
204	1345	1055	20	388	50
316	1295	1035	19	375	53
427	1350	1080	19	388	#
538	1140	965	19	321	#
593	1015	770	20	293	64
650	960	695	20	277	84

 

Grade 431 is frequently stocked and supplied in "Condition T", with specified tensile strength of 850 - 1000MPa.

* Annealed tensile properties are typical for Condition A of ASTM A276; annealed hardness is the specified maximum. Grade 431 is only rarely stocked in annealed Condition A.

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.