A859 Grade B - ASTM A859/A859M-2023 - H2ABC

中文版

Grade	A859 Grade B
Corresponding Standard	ASTM A859/A859M-2023 Standard Specification for Age-Hardening Alloy Steel Forgings for Pressure Vessel Components
Classification	Alloy Steel

A859 Grade B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	As	Ti	V	Nb	Al	Sn	Sb	More
Minimum Value	0.02	-	0.75	-	-	0.45	3.35	1.15	0.55	-	-	-	0.02	-	-	-	Nitrogen：report
Maximum Value	0.04	0.4	1.05	0.015	0.002	0.75	3.85	1.75	0.65	0.025	0.003	0.08	0.06	0.03	0.03	0.025	Nitrogen：report

A859 Grade B Mechanical Properties

Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
≥725	690~800	≥16	≥45	Test Temperature -18℃ ：110 Test Temperature -85℃ ：80

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