B7 CrMo - ASTM A193/A193M-2001

Grade	B7
Other Names
Corresponding Standard	ASTM A193/A193M-2001 Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Servise
Classification	Alloy Steel
Properties	High-Temperature Strength

B7 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo
Minimum Value	0.37	0.15	0.65	-	-	0.75	0.15
Maximum Value	0.49	0.35	1.1	0.035	0.04	1.2	0.25

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

B7 Mechanical Properties

diameter d mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
d≤M64	≥860	≥720	≥16	≥50	≤321
M64＜d≤M100	≥795	≥655	≥16	≥50	≤321
M100＜d≤M180	≥690	≥515	≥18	≥50	≤321

New and Old Grade Replacement List

B7 Corresponding Standards(Same grade name, different standards)

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