Q690MC - GB /T 1591-2018

Grade	Q690MC
Corresponding Standard	GB /T 1591-2018 High Strength Low Alloy Structural Steels
Classification	Alloy Steel

Q690MC 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	2	0.03	0.03	1	0.8	0.8	0.3	0.015	0.05	0.12	0.11	0.004	-

Q690MC 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	770~940	ReH: ≥690	≥14
16＜t≤40		770~940	ReH: ≥680	≥14
40＜t≤63		750~920	ReH: ≥670	≥14
63＜t≤80		730~900	ReH: ≥650	≥14
specimen	0°C				long. ≥55 tr. ≥34

New and Old Grade Replacement List

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