A High Yield Strength steel for welded and weight – saving structures

Bozhong 690QL1 is a high strength quenched and tempered steel dedicated for structure and enables to make weight savings thanks to a minimum yield strength of 690 N/mm2.

Thanks to its exceptional purity rate (very low sulphur and phosphorous contents), and its adapted chemical analysis, the Bozhong 690QL1 steel is easy to shape and to weld.

Standards
EE 690 TIIK4, according to NFA 36 – 204 standard Bozhong 690QL1 according to EN 10025 – 6 standard

Chemical Analysis
Typical values (weight %)

C	Mn	Si	Cr	Mo	P	S	V	Ni	Cu	Al
.20	1.60	.50	1.50	.60	.02	.02	.080	1.35	.50	.02 to .05

Carbon Equivalent

Thickness range – mm (*)	C.Eq
≤ 20 (.78")	≤ .45
20.01 – 60 (.79″ – 2.36″)	≤ .55
60.01 – 120 (2.37″ – 4.73″)	≤ .58
120.01 – 150 (4.74″ – 5.9′)	≤ .61

Mechanical properties

Thickness	Y.S. 0.2 N/mm²(ksi)	UTS N/mm²(ksi)	Elongation A 5%
≤ 10 mm (0.4")	690 (100)	770 – 940 (112 – 136)	14
10	690 (100)	770 – 940 (112 – 136)	14
50	650 (94)	760 – 930 (112 – 134)	14
100	630 (91)	710 – 900 (103 – 130)	14

Attached File
http://www.industeel.info/wp-content/uploads/2016/01/DS-HSS-AMSTRONGULTRA690QL1-GB.pdf