A268 25-4-4 S44635 - ASTM A268/A268M-2020

Grade	A268 25-4-4
USA UNS	S44635
Corresponding Standard	ASTM A268/A268M-2020 Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
Classification	Ferritic Stainless Steel

A268 25-4-4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	N	More
Minimum Value	-	-	-	-	-	24.5	3.5	3.5	-	Ti+Cb：0.20+4(C+N) ~ 0.80
Maximum Value	0.025	0.75	1	0.04	0.03	26	4.5	4.5	0.035	Ti+Cb：0.20+4(C+N) ~ 0.80

A268 25-4-4 Mechanical Properties

Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
≥620	≥515	≥20	≤270

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