Product Overview
ASTM A131 Shipbuilding Quality Steel Plate is a marine structural steel plate manufactured to ASTM A131 for commercial and naval shipbuilding. Available in ordinary- and high-strength grades, it provides certified weldability, impact toughness, and structural reliability for hulls, offshore structures, and marine engineering equipment.
Technical Specifications
|
Item |
Specification |
|
Product Grade |
Grade A, Grade B, Grade D, Grade E, AH32, DH32, EH32, FH32, AH36, DH36, EH36, FH36, AH40, DH40, EH40, FH40 |
|
Standard |
ASTM A131 |
|
Thickness |
5–150 mm |
|
Width |
1,000–4,000 mm |
|
Length |
3,000–18,000 mm or customized |
|
Delivery Condition |
Hot Rolled (HR), Normalized (N), TMCP (depending on grade) |
|
Edge Type |
Mill Edge (ME), Trimmed Edge (TE) |
|
Surface Condition |
As Rolled, Shot Blasted & Primed (optional) |
Chemical Composition
|
Element |
Chemical composition(heat analysis% max |
|
|
AH/DH/EH32 AH/DH/EH36 and AH/DH/EH40 |
FH32/36/40 |
|
|
C |
0.18 |
0.16 |
|
Mn |
0.90-1.60 |
0.90-1.60 |
|
Si |
0.10-0.50 |
0.10-0.50 |
|
P |
0.035 |
0.025 |
|
S |
0.035 |
0.025 |
|
Al min |
0.015 |
0.015 |
|
Cb |
0.02-0.05 |
0.02-0.05 |
|
V |
0.05-0.10 |
0.05-0.10 |
|
Ti |
0.02 |
0.02 |
|
Cu |
0.35 |
0.35 |
|
Cr |
0.20 |
0.20 |
|
Ni |
0.40 |
0.40 |
|
Mo |
0.08 |
0.08 |
|
N |
- |
0.009 |
Mechanical Properties
|
Grade |
Tensile Strength ksi(Mpa) |
Yield Strength min ksi(Mpa) |
Elongation in 8 in (200mm) % |
Elongation in 2 in (50mm) min % |
|
Ordinary strength |
58-75(400-520) |
34(235) |
21 |
24 |
|
A B D E CS |
||||
|
Higher strength |
||||
|
AH32 DH32 EH32 FH32 |
64-85(440-590) |
46(315) |
19 |
22 |
|
AH36 DH36 EH36 FH36 |
71-90(190-620) |
51(355( |
19 |
22 |
|
AH40 DH40 EH40 FH40 |
74-94(510-650) |
57(390) |
19 |
22 |
Typical Applications
- Ship hull structures
- Offshore drilling platforms
- Marine decks and bulkheads
- Port and harbor steel structures
Processing Services
|
Processing Service |
Description |
|
CNC Flame Cutting |
Precision cutting for heavy structural components. |
|
Plasma Cutting |
Suitable for complex contours with high dimensional accuracy. |
|
Laser Cutting |
Available for thinner plates requiring fine edge quality. |
|
Beveling |
Welding groove preparation according to fabrication drawings. |
|
Drilling |
CNC hole processing for assembly requirements. |
|
Plate Leveling |
Improves flatness before fabrication. |
|
Bending |
Cold or hot forming according to project specifications. |
|
Shot Blasting & Priming |
Improves surface cleanliness and provides temporary corrosion protection. |
|
Welding Assembly |
Prefabricated steel components available upon request. |
|
Custom Marking |
Heat number, project ID, or customer markings can be applied. |
Quality Assurance
Inspection Process
- Raw material chemical composition verification (Optical Emission Spectrometer)
- Plate thickness measurement
- Dimensional tolerance inspection
- Surface defect visual inspection
- Tensile strength test
- Yield strength test
- Elongation test
- Charpy V-notch impact test
- Through-thickness (Z15/Z25/Z35) testing
- Ultrasonic Testing (UT)
- Hardness testing (when specified)
- Flatness inspection
- Mill Test Certificate (MTC) verification before shipment
Certifications
|
Certification |
Meaning |
|
ISO 9001:2000 |
Quality Management System |
|
ISO 14001:2004 |
Environmental Management System |
|
ASTM A131 |
Shipbuilding Structural Steel Specification |
|
EN 10204 3.1 |
Mill Test Certificate with manufacturer inspection results |
Packaging & Shipping
Export Packing: Steel straps with reinforced bundles, steel tags, and seaworthy export packaging.
Rust Protection: Bare surface, anti-rust oil, or shot blasted and shop-primed according to customer requirements.
Loading Method: Container loading for standard sizes; bulk vessel or breakbulk for oversized plates.
FAQ
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