Q500MD - GB /T 1591-2018 - H2ABC

中文版

Grade	Q500MD
Corresponding Standard	GB /T 1591-2018 High Strength Low Alloy Structural Steels
Classification	Alloy Steel

Q500MD Chemical Element Composition Content (%)

Component	C	Si	Mn	P ^②	S ^②	Cr	Ni	Cu	Mo	N	Ti ^③	V	Nb	B	Al ^④
Minimum Value	-	-	-	-	-	-	-	-	-	-	0.006	0.01	0.01	-	0.015
Maximum Value	0.18	0.6	1.8	0.03	0.025	0.6	0.8	0.55	0.2	0.025	0.05	0.12	0.11	0.004	-

Q500MD Mechanical Properties

thickness or diameter t mm	Test Temperature	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t≤16	Room Temperature	610~770	ReH: ≥500	≥17
16＜t≤40		610~770	ReH: ≥490	≥17
40＜t≤63		600~760	ReH: ≥480	≥17
63＜t≤80		590~750	ReH: ≥460	≥17
80＜t≤100		540~730	ReH: ≥450	≥17
specimen	-20°C				long. ≥47 tr. ≥27
specimen	-30°C				long. ≥27*

New and Old Grade Replacement List

Corresponding Standard	Grade
GB /T 1591-2008	Grade China ISC
GB /T 1591-2018	Grade

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