SHY 685 - JIS G 3128-2021

Grade	SHY 685
Corresponding Standard	JIS G 3128-2021 High Yield Strength Steel Plates for Welded Structure
Classification	Alloy Steel
Properties	Good Weldability

SHY 685 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu	Mo	V	B
Minimum Value	-	-	-	-	-	-	-	-	-	-
Maximum Value	0.18	0.55	1.5	0.03	0.025	1.2	0.5	0.6	0.1	0.005

◎ Alloying elements other than those given in the above Table may be added, if necessary.

SHY 685 Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
6≤t≤50	780~930	≥685	No.5 tr.: 6≤t≤16 ≥16 16＜t≤100 ≥24 No.4 tr.: 20＜t≤100 ≥16	-20°C③: t≥12mm No.4 long.: ≥47① ≥27②
50＜t≤100	760~910	≥665	No.5 tr.: 6≤t≤16 ≥16 16＜t≤100 ≥24 No.4 tr.: 20＜t≤100 ≥16	-20°C③: t≥12mm No.4 long.: ≥47① ≥27②

◎ Heat-treatment: quenching and tempering

◎ Transverse sample No.1 bend angle 180°：6≤t≤32，inside radius 1.5t；32＜t≤100，inside radius 2t
① Mean value of 3 test pieces.
② Value of individual test piece.
③ The test temperature lower than those specified in this table may be used upon agreement between the purchaser and the manufacturer.

SHY685 Corresponding Standards(Same grade name, different standards)

1	JIS G 3128-1999(R2004)
	SHY 685
2	JIS G 3128-2021
	SHY 685

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