A437 Grade B4D - ASTM A437/A437M-2015

Grade	A437 Grade B4D
Corresponding Standard	ASTM A437/A437M-2015 Stainless and Alloy-Steel Turbine-Type Bolting Specially Heat Treated for High-Temperature Service
Classification	Alloy Steel

A437 Grade B4D Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	V	Al
Minimum Value	0.36	0.2	0.45	-	-	0.8	0.5	0.25	-
Maximum Value	0.44	0.35	0.7	0.04	0.04	1.15	0.65	0.35	0.015

A437 Grade B4D Mechanical Properties

	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
d≤65	≥860	≥720	≥18	≥50
65＜d≤100	≥760	≥655	≥17	≥45
100＜d≤180	≥690	≥585	≥16	≥45

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