S. K. International

Weldox 700 (High Strength Steel)

General Product Description

Weldox 700 is a general structural steel with a minimum yield strength of 650 – 700 MPa depending on thickness. Weldox 700 meets the requirements of EN 10025 for the corresponding grades and thicknesses. Typical applications are demanding load-bearing structures.

Available dimensions

Weldox 700 E is available in plate thicknesses of 4 – 160 mm and Weldox 700 F is available in plate thicknesses of 4 – 130 mm. Both grades are available in widths up to 3350 mm and lengths up to 14630 mm. For thicknesses over 100 mm preferred width is 1650 mm with untrimmed edge.

Mechanical Properties

Thickness mm	Yield strength ¹⁾ R_{p 0.2'} min MPa	Tensile strength ¹⁾ R_m MPa	Elongation A₅ min %	Typical hardness HBW
4 - 53	700	780 – 930	14	260 - 310
(53) - 100	650	780 – 930	14	260 - 310
(100) - 160	650	710 – 900	14	240 - 290

1) For transverse test pieces according to EN 10025.

Impact properties	E -40°C	F -60°C
Min. impact energy (J) for transverse tests Charpy V 10x10 mm tests specimens 2)	69 J	27 J
Meet the requirements for	S 690 QL	S 690 QL1

2) Unless otherwise agreed, transverse impact testing according to EN 10025-6 option 30 will apply. For thicknesses between 6 – 11.9 mm, sub-size Charpy V-specimens are used. The specifi ed minimum value is then proportional to the cross-sectional area of the specimen compared to a full-size specimen (10 x 10 mm).

Chemical Composition (heat analysis)

C *) Max %	Si *)Max %	Mn *) Max %	P Max %	S Max %	Cr *) Max %	Cu *) Max %	Ni *) Max %	Mo *) Max %	B *) Max %
0.20	0.60	1.60	0.020	0.010	0.70	0.30	2.0	0.70	0.005

The steel is grain refined. *)Intentional alloying elements.

Maximum Carbon Equivalent CET (CEV)

Thickness mm	- 5	(5 )- (10)	10 - (20)	20 - (40)	40 - (80)	80 - (100)	100 - 160
WELDOX 700E: CET (CEV)	0.34 (0.48)	0.31 (0.48)	0.31 (0.48)	0.36 (0.52)	0.39 (0.58)	0.39 (0.58)	0.41 (0.67)
WELDOX 700F: CET (CEV)	0.38 (0.57)	0.38 (0.57)	0.38 (0.57)	0.38 (0.57)	0.39 (0.58)	0.39 (0.58)	0.41 (0.67)