A193 B8ML4CuN Class 1D S31730 - ASTM A193/A193M-2019

Grade	A193 B8ML4CuN Class 1D
USA UNS	S31730
Corresponding Standard	ASTM A193/A193M-2019 Alloy-steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications
Classification	Austenitic Stainless Steel
Properties	Corrosion Resistance Forgability

A193 B8ML4CuN Class 1D Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N
Minimum Value	-	-	-	-	-	17	15	4	3	-
Maximum Value	0.03	1	2	0.04	0.01	19	16.5	5	4	0.045

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

A193 B8ML4CuN Class 1D Mechanical Properties

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
Carbide Solid Solution Treatment	≥480	≥175	≥35	≥50	（HRB） ≤90

A193B8ML4CuNClass1D Corresponding Standards(Same grade name, different standards)

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