GB 712 Grade B shipbuilding steel is a kind of ordinary strength structural steel for ships and ocean engineering. Hot rolled GB 712Grade B steel products are supplied in plates, sheets, angles steel bars, steel channels, H beams and bulb flats.
GB 712 Grade B Shipbuilding Steel Specification
Standard: GB 712-2011
Material: Grade B
Category: ships and ocean engineering structural steel
Shapes: GB 712 Grade B plate, GB 712 Grade B sheets, GB 712 Grade B coils, GB 712Grade B steel angles, GB 712Grade B H beams, GB 712Grade B bulb flats
Grade B Shipbuilding Steel Plates Size
Thickness: 4mm to 150mm,
Width: 1200mm to 4000mm
Length: 3000mm to 18000mm
The GB 712-2011 standard specifies the classification and grade, order content, size, shape, weight and allowable deviation, requirements, inspection and test, packaging, marking and quality certificate of structural steel for ships and marine engineering. This standard is applicable to the manufacture of GB 712Grade B steel plates with thickness of not more than 150 mm, GB 712Grade B steel sheets and strips less than 25.4 mm and GB 712Grade B steel profiles with diameter not more than 50 mm for the navigation vessels, fishing vessels and marine engineering structures in the ocean, coastal and inland river navigation areas.
Grade B Shipbuilding Steel Chemical Composition in GB 712-2011 standard
| Grade | C max | Si max | Mn min | P max | S max | C+Mn/6 |
|---|---|---|---|---|---|---|
| GB 712 Grade B | 0.21 | 0.35 | 0.60 | 0.035 | 0.035 | 0.40 |
Grade B Shipbuilding Steel Mechanical Properties in GB 712-2011 standard
| Grade | Yield Strength (Mpa) | Tensile Strength (MPa) |
Elongation in8 in.[200mm] (%) | Elongation in2 in.[50mm] (%) | Test Temperature(°C) |
| GB 712 Grade B | 235 | 400-520 | 21 | 24 | 0 |
Grade B shipbuilding steel plates in GB 712-2011 standard are applicable to the hull structure of ships in ocean, coastal and inland rivers.GB 712-2011 Grade B shipbuilding steel products also can be used for ship repairing, the offshore oil drilling platform, the platform pipe joints and other components. We can supply GB 712Grade B shipbuilding steel plates with nine marine class certifications ABS, BV, LR, DNV, CCS, GL, NK, KR, and RINA class society.
GB712 common strength steel grades: GB 712 Grade A | GB 712 Grade B | GB 712 Grade D |GB 712 Grade E
