A194 Grade 8MLCuNA S31254 - ASTM A194/A194M-2023

Grade	A194 Grade 8MLCuNA
USA UNS	S31254
AISI American Iron and Steel Institute	254
Corresponding Standard	ASTM A194/A194M-2023 Standard Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
Classification	Austenitic Stainless Steel
Properties	Corrosion Resistance

A194 Grade 8MLCuNA 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

A194 Grade 8MLCuNA Mechanical Properties

product	Heat Treatment or Condition	Hardness HBW
Finished Nuts	Solid Solution Treatment	126~192HBW 60~90HRB

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

A194Grade8MLCuNA Corresponding Standards(Same grade name, different standards)

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