S40977 - ASTM A554-2026

USA UNS	S40977
Corresponding Standard	ASTM A554-2026 Welded Stainless Steel Mechanical Tubing
Classification	Ferritic Stainless Steel

Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	N
Minimum Value	-	-	-	-	-	10.5	0.3	-
Maximum Value	0.03	1	1.5	0.04	0.015	12.5	1	0.03

Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
Annealing	≥414	≥241	≥20	HB：≤190 HRB：≤90

Approximate Comparison Table Ferritic Heat-Resistant Steel

China		United States	International Organization for Standardization		European Standard
GB	ISC	UNS	ISO	Numerical Grade	EN	Numerical Grade
022Cr12Ni GB/T 20878-2024	S11213	S40977 ASTM A959	X2CrNi12 ISO 15510	4003-410-77-I	X2CrNi12 EN 10088-1	1.4003

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!