Description
A structural steel developed for use in demanding load-bearing structures within the Offshore and Marine Industry.
S700 steel exceeds the requirements of S690QL steel, EN 10025-6. S700 steel can be ordered with dual steel grades certificate, where the additional steel grade is defined and approved by one of the Classification Societies listed below.
The dual certification offers You the benefits of excellent mechanical properties, extra tight tolerances, formability and consistency of VANFORGE
Classification society
- American Bureau of Shipping AB EQ70, 4.8 to 130 mm thickness.
- DNV - GL NV E690, VL E690, 6 to 80 mm thickness.
- Lloyds Register LR EH 69, 8 to 80 mm thickness.
Dimension Range
S700 steel is available in plate thicknesses of 4 – 130 mm and available in widths up to 3350 mm and lengths up to 14630 mm depending on thickness.
Mechanical Properties
| Thickness (mm) | Yield strength1) Rp0.2 (min MPa) | Tensile strength (1) Rm (MPa) | Elongation A5 (min %) |
| 4.0 - 130.0 | 700 | 780 - 930 | 14 |
(1) For transverse test pieces according to EN 10 025.
Impact Properties
| Grade | Min transverse test, impact energy, Charpy V 10x10 mm tests specimens (1) |
| S700 steel | 69 J/-40 °C |
(1) Unless otherwise agreed, only transverse impact testing.
Additional Options for Mechanical properties:
Option 1 - Min guaranteed impact energy (J) for transverse testing Charpy V 10x10 mm tests specimens 50 J/ -60 °C.
Option 2 - Improved deformation properties perpendicular to the surface. Through- thickness tensile testing according to EN 10 164, Class Z35, Z25 and Z15.
Chemical Composition (ladle analysis), %, max
| C | Si | Mn | P | S | Cr | Cu | Ni | Mo | B |
| 0.20 | 0.10-0.55 | 1.60 | 0.015 | 0.003 | 0.80 | 0.30 | 2.0 | 0.70 | 0.005 |
The steel is grain refined.
Thickness
Tolerances meet the requirements of EN 10029 Class A, but offers narrower tolerances.
Length and Width
Tolerances conform with EN 10029.
Shape
Tolerances according to EN 10 029.
Flatness
Tolerances according to EN 10029 Class N.
Surface Properties
According to EN 10 163-2 Class A, Subclass 3.
Delivery Conditions
The delivery condition is Q+T (Quenched and Tempered). The plates are delivered with sheared or thermally cut edges.
Untrimmed edges after agreement.
Fabrication and Other Recommendations
Welding, bending and machining.
S700 steel has obtained its mechanical properties by quenching and subsequent tempering. The properties of the delivery condition cannot be retained after exposure to temperatures in excess of 580 °C.
Appropriate health and safety precautions must be taken when welding, cutting, grinding or otherwise working on this product. Grinding, especially of primer coated plates, may produce dust with a high particle concentration.
Specification
Plate thickness: 4-100mm
Width: 500mm – 4700mm
Length: On request
Production process
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S700 high yield structural steel plate for offshore and marine industry Images
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