A193 B8MLCuN Class 2 S31254 - ASTM A193/A193M-2001

Grade	A193 B8MLCuN Class 2
USA UNS	S31254
Corresponding Standard	ASTM A193/A193M-2001 Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Servise
Classification	Austenitic Stainless Steel
Properties	Corrosion Resistance

A193 B8MLCuN Class 2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N
Minimum Value	-	-	-	-	-	19.5	17.5	0.5	6	0.18
Maximum Value	0.02	0.8	1	0.03	0.01	20.5	18.5	1	6.5	0.22

Note: The intentional addition of Bi, Se, Te, and Pb is not permitted.

A193 B8MLCuN Class 2 Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
d≤M20	Carbide Solution Treatment + Strain Hardening	≥760	≥665	≥15	≥45	≤321
M20＜d≤M24	Carbide Solution Treatment + Strain Hardening	≥690	≥550	≥20	≥45	≤321
M24＜d≤M30	Carbide Solution Treatment + Strain Hardening	≥655	≥450	≥25	≥45	≤321
M30＜d≤M36	Carbide Solution Treatment + Strain Hardening	≥620	≥345	≥30	≥45	≤321

1 Approximate Comparison Table

China		Japan	United States		International Organization for Standardization	European Standard		Sweden
GB	ISC	JIS	ASTM	UNS	ISO	EN	Numerical Grade	SS
015Cr20Ni18Mo6CuN	S31252	SUS 312L	S31254	S31254	X1CrNiMoN 20-18-7 X1CrNiMoCuN20-18-7	X1CrNiMoCuN 20-18-7	1.4547	254SMO

2 Approximate Comparison Table

A193B8MLCuNClass2 Corresponding Standards(Same grade name, different standards)

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