A193 B8CLN Class 1 S34751 347LN - ASTM A193/A193M-2020

Grade	A193 B8CLN Class 1
USA UNS	S34751
Other Names
Corresponding Standard	ASTM A193/A193M-2020 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 Weldability

A193 B8CLN Class 1 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	N	Nb	More
Minimum Value	0.005	-	-	-	-	17	9	0.06	0.2	Nb≥15C
Maximum Value	0.02	1	2	0.045	0.03	19	13	0.1	0.5	Nb≥15C

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

A193 B8CLN Class 1 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	≥515	≥205	≥30	≥50	≤223

• d-diameter of bolt, screw, studs, double-end studs, bars and wire.

A193B8CLNClass1 Corresponding Standards(Same grade name, different standards)

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