Grade B24V 4340V Mod. - ASTM A 540/A540M-2024

Grade	Grade B24V
Other Names
Corresponding Standard	ASTM A540/A540M-2024 Alloy-steel Bolting for Special Applications
Classification	Alloy Steel

Grade B24V Chemical Element Composition Content (%)

Component	C	Si ^②	Mn	P ^①	S ^①	Cr	Ni	Mo	V
Minimum Value	0.37	0.15	0.6	-	-	0.6	1.55	0.4	0.04
Maximum Value	0.44	0.35	0.95	0.025	0.025	0.95	2	0.6	0.1

Grade B24V Mechanical Properties

diameter d mm	Mark	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
d≤100	Class 3	≥1000	≥895	≥12	≥40	293~363	-12.2°C：①
100＜d≤200	Class 3	≥1000	≥895	≥12	≥40	302~375	-12.2°C：②
200＜d≤240	Class 3	≥1000	≥895	≥12	≥40	311~388	-12.2°C：③
d≤100	Class 2	≥1070	≥965	≥11	≥40	311~388	-12.2°C：②
100＜d≤200	Class 2	≥1070	≥965	≥11	≥40	311~401	-12.2°C：③
200＜d≤280	Class 2	≥1070	≥965	≥11	≥40	321~415
d≤100	Class 1	≥1140	≥1035	≥10	≥35	321~415	-12.2°C：③
100＜d≤200	Class 1	≥1140	≥1035	≥10	≥35	331~429
200＜d≤280	Class 1	≥1140	≥1035	≥10	≥35	331~444

GradeB24V 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"!