Original
By certification 
Description
Hull Structural Steel Plates are structural steel suitable for building and repairing ship hulls, also known as hull steel and hull steel. It has good welding and other properties and is suitable for repairing and shipbuilding main structures. You can use it to build and repair hull structures (such as outer plates, decks, bulkheads, keels, ribs, and frames). It is divided into general strength structural steel and high strength structural steel according to strength. The yield point of structural steel with general strength shall not be less than 235MPa (24kg/mm2). High-strength structural steel can be divided into 32kg, 36kg, 40kg (mostly used for merchant ship hulls) and above 45kg (used for ship hulls) according to the yield point. In addition, we also have hull steel for special purposes, such as low magnetic steel, low-temperature steel, bulletproof steel, etc. Hull Structural Steel Plates have high strength, plasticity, and toughness, suitable yield ratio, excellent cold and hot bending process performance, brittle fracture resistance, welding performance, fatigue resistance, and seawater corrosion resistance, which can ensure the safety and life of the ship.
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Delivery Conditions
(1) Grades A, B and D are delivered in controlled rolling (CR) condition, while Grade E is delivered in normalized condition.
(2) The high-strength hull and ocean engineering structural steel plates of A32/A36/A40, D32/D36/D40, E32/E36/E40 F32/E36/F40 (Z25, Z35) are delivered in controlled rolling, normalizing or thermo mechanical control processing (TMCP).
(3) EN10225-S355 ocean engineering structural steel plates are delivered in thermo-mechanical control processing (TMCP).
(4) API 2H/2W ocean engineering structural steel plates are delivered in normalizing, thermo mechanical control processing (TMCP).
Steel Grades
Category |
Standard |
Grade |
Remarks |
|
Chinese standards |
GB712-2011 |
Aã€Bã€Dã€E（Z25ã€Z35） A32/A36/A40ã€D32/D36/D40 E32/E36/E40ã€F32/E36/F40 |
Ship and ocean engineering structural steel |
Classification society rules |
DNVGLã€LRã€BVã€ABSã€CCS〠|
Aã€Bã€Dã€E（Z25ã€Z35） |
Rules of classification |
NKã€RINAã€KRã€RS |
A32/A36/A40ã€D32/D36/D40ã€E32/E36/E40ã€F32/E36/F40 |
societies of 10 countries |
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Foreign standards |
BS EN10225 |
S355G5+Mã€355G6+Mã€S355G7+Mã€355G8+M〠|
Weldable structural steels for fixed offshore structures |
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Foreign standards |
API Spec 2H API Spec 2W |
API 2H-42ã€API 2H-50ã€API 2W-50ã€API 2W-60 |
Specification for carbon manganese steel plate for offshore platform Tubular joints/Specification for Steel Plates for Offshore Structures, Produced by Thermo-Mechanical Control |
Chemical Composition Maximum (%)
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Grade |
Chemical Composition Maximum (%) |
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C |
Si |
Mn |
S |
P |
Als |
|
A |
0.21 |
0.50 |
≥2.5C |
0.035 |
0.035 |
- |
B |
0.35 |
0.80～1.20 |
- |
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D |
0.60～1.20 |
≥0.015 |
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E |
0.18 |
0.35 |
≥0.70 |
0.035 |
0.035 |
≥0.015 |
A/D/E/F32ã€36 |
0.18 |
0.50 |
0.90～1.60 |
0.035 |
0.035 |
≥0.015 |
A/D/E/F40 |
0.09 |
0.35 |
0.90～1.60 |
0.035 |
0.035 |
≥0.015 |
S355G5+M |
0.14 |
0.55 |
1.60 |
0.005 |
0.020 |
≥0.015 |
S355G6+M | ||||||
S355G7+M | ||||||
S355G8+M |
0.15～0.55 |
1.00～1.65 |
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S355G9+M |
0.12 |
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S355G10+M | ||||||
API 2H-42 |
0.18 |
0.05-0.40 |
0.90-1.35 |
0.010 |
0.030 |
0.02-0.06 |
API 2H-50 |
1.15-1.60 |
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API 2W-50 |
0.16 |
0.05-0.50 |
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API 2W-60 | ||||||
Mechanical Properties
|
Grade |
Yield Strength, MPa |
Tensile Strength, MPa |
Elongation, |
V-notch Impact Absorbed Energy, J, ≥ |
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Temp, |
Thickness ≤50mm |
Thickness﹥50～70mm |
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Longitudinal |
Transversal |
Longitudinal |
Transversal |
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A |
235 |
400～520 |
22 |
20 |
- |
- |
34 |
24 |
B |
0 |
27 |
20 |
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D |
-20 |
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E |
-40 |
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A32 |
315 |
440～570 |
22 |
0 |
31 |
22 |
38 |
26 |
D32 |
-20 |
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E32 |
-40 |
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F32 |
-60 |
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A36 |
355 |
490～620 |
21 |
0 |
34 |
24 |
41 |
27 |
D36 |
-20 |
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E36 |
-40 |
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F36 |
-60 |
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A40 |
0 |
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D40 |
390 |
510-660 |
20 |
-20 |
39 |
26 |
46 |
31 |
E40 |
-40 |
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F40 |
-60 |
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Grade |
Yield Strength, MPa |
Tensile Strength, MPa |
Elongation, |
V-notch Impact Absorbed |
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≤25 |
＞25～40 |
＞40～63 |
＞63～75 |
Temp, ℃ |
Longitudinal |
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S355G5+M |
355 |
345 |
335 |
325 |
470～630 |
22 |
-40 |
50 |
S355G6+M | ||||||||
S355G7+M | ||||||||
S355G8+M | ||||||||
S355G9+M | ||||||||
S355G10+M | ||||||||
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Grade |
Thickness，mm |
Yield Strength, MPa, ≥ |
Tensile Strength, MPa |
Elongation, |
V-notch Transversal Impact |
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Temp, |
Average |
Single |
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API 2H-42 |
/ |
289 |
425-565 |
22 |
-40 |
34 |
27 |
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API 2H-50 |
≤63.5 |
345 |
483-620 |
21 |
-40 |
41 |
34 |
＞63.5 |
325 |
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API 2W-50 |
≤25.4 |
345-517 |
≥448 |
23 |
-40 |
41 |
34 |
＞25.4 |
345-483 |
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API 2W-60 |
≤25.4 |
414-621 |
≥517 |
22 |
-40 |
48 |
41 |
＞25.4 |
414-586 |
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Available Size
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