Grade B22 4142-H - ASTM A540/540M-2015

Grade	Grade B22
Other Names
Corresponding Standard	ASTM A540/540M-2015 Alloy-Steel Bolting for Special Applications
Classification	Alloy Steel

Grade B22 Chemical Element Composition Content (%)

Component	C	Si	Mn	P ^①	S ^①	Cr	Mo
Minimum Value	0.39	0.15	0.65	-	-	0.75	0.15
Maximum Value	0.46	0.35	1.1	0.025	0.025	1.2	0.25

Grade B22 Mechanical Properties

	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
Class 5, d≤50	≥825	≥725	≥15	≥50	248~293	-12.2°C ≥47
Class 5, 50＜d≤100	≥795	≥690	≥15	≥50	255~302
Class 4, d≤25	≥930	≥825	≥13	≥45	269~341	≥47
Class 4, 25＜d≤100	≥930	≥825	≥13	≥45	277~363
Class 3, d≤50	≥1000	≥895	≥12	≥40	293~363
Class 3, 50＜d≤100	≥1000	≥895	≥12	≥40	302~375
Class 2, d≤75	≥1070	≥965	≥11	≥40	311~401
Class 1, d≤38	≥1140	≥1035	≥10	≥35	321~401

GradeB22 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"!