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

Bozhong 690QL 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, Bozhong 690QL steel is easy to shape and to weld.

Standards
Bozhong 690QL fulfills the requirements of S690QL according to EN 10025-6 standard, last edition.

Chemical Analysis
Typical values (weight %)

C	Mn	Si	Cr	Mo	P	S	V	Ni	Cu	Al
.20	1.60	.50	1.50	.60	.02	.010	.080	1	.50	.02 to .05

Carbon Equivalent

Thickness range – mm (*)	C.Eq
<;= 20 (.78")	<;= .45
20.01 – 120 (.79″ – 4.73″)	<;= .55
120.01 – 150 (2.37″ – 4.73″)	<;= .58

Mechanical Properties

Thickness	Y.S. 0.2 N/mm²(ksi)	UTS N/mm²(ksi)	Elongation A 5%
<= 50 mm (2")	690 (100)	770 – 940 (112 – 136)	14
50	650 (94)	760 – 930 (110 – 130)	14
100	630 (91)	710 – 900 (103 – 130)	14

Attached File:
http://www.industeel.info/wp-content/uploads/2016/01/DS-HSS-AMSTRONGULTRA690QL-GB.pdf