Product Overview
EH32 shipbuilding steel plate, certified by ABS, LR, DNV, CCS and all major classification societies. Yield strength ≥315 MPa, impact tested at -40°C. Ideal for icebreakers, OSVs, and VLCCs. CNC cutting and beveling services available. Request a quote with MTC now.
EH32 Marine Steel Plate – High-Strength Low-Alloy Steel for Demanding Marine Environments
EH32 is a high-strength, low-alloy shipbuilding steel officially designated under ASTM A131 and ABS standards. It is specifically engineered for the construction of ocean-going vessels, offshore drilling rigs, and large container ships operating in polar or extreme cold regions.
Unlike standard structural steel, EH32 is characterized by its exceptional low-temperature toughness at -40°C. It is a required material for shipyards and repair facilities that demand guaranteed performance in harsh environments.
Key Standards: ABS, BV, CCS, DNV-GL, LR, NK, RINA
Grade: EH32 (E Grade High Tensile Steel)
Thickness Range: 6mm – 150mm (customized per project)
Width: Up to 4500mm
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Why Choose EH32 Over Lower Grades?
One-stop steel procurement
A Grade Steel: Suitable for general internal structures (0°C impact test).
D Grade Steel: Standard for hulls in temperate waters (-20°C impact test).
E Grade Steel (EH32): Mandatory for the main strength deck, sheer strake, and bottom plating of vessels over 100 meters in length operating in cold regions.
Key Technical Specifications & Mechanical Properties
| Parameter | Value / Requirement | Why It Matters |
|---|---|---|
| Yield Strength (ReH) | ≥ 315 MPa (46 ksi) | Ensures structural integrity under extreme cargo loads. |
| Tensile Strength (Rm) | 440 – 590 MPa | High safety margin against structural failure. |
| Elongation | ≥ 22% | Excellent ductility for complex hull forming. |
| Charpy V-Notch Test | -40°C / 31J (Avg.) | Guarantees no brittle fracture in Arctic service conditions. |
| Carbon Equivalent (Ceq) | Strictly controlled ≤ 0.38% | Superior weldability for automated production lines. |
Application Scenarios
Shipbuilding
Icebreakers, Offshore Supply Vessels (OSV), Bulk Carriers, VLCCs (Very Large Crude Carriers).
Offshore Engineering
Jack-up rigs legs, semi-submersible platforms.
Harsh Environment Zones
External hull plates exposed to sea ice.
Repair & Retrofit
Replacing worn-out sections of existing vessels.
Comparison: EH32 vs. AH32 vs. DH32
| Feature / Grade | AH32 (General) | DH32 (Low Temp) | EH32 (Arctic) |
|---|---|---|---|
| Min. Yield Strength | 315 MPa | 315 MPa | 315 MPa |
| Impact Test Temperature | 0°C (32°F) | -20°C (-4°F) | -40°C (-40°F) |
| Impact Energy (Average) | 31J | 31J | 31J |
| Primary Market | Deck houses, interiors, mild climates | Hulls of general cargo ships | Icebreakers, Arctic OSV, main strength members |
| Availability | High | High | Available (often made-to-order) |
| Price Index | Low | Medium | High (due to alloying elements Nb/V) |
why choose us?
We don't just sell steel; we deliver ready-to-fabricate components to help you reduce waste and labor costs. We offer complete pre-processing services:
Cutting: CNC Plasma & Laser cutting to exact dimensions.
Welding Preparation: Beveling (V, X, K types) for ready-to-weld edges.
Heat Treatment: Normalizing (N) or TMCP to ensure -40°C impact properties.
Z-Test: Through-thickness properties (Z15, Z25, Z35) available for nodes and heavy plates.
Certification: Guaranteed 3.1 Mill Test Certificate (MTC) per EN 10204, witnessed by third-party surveyors (ABS/DNV/Lloyd's).
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User Evaluation
Mr. Chen Wei
Singapore · Large Shipbuilding and Repairing Group
Ms. Nguyen Thi Hong
Haiphong · Shipbuilding Group of Vietnam
Mr. Rajesh Kumar
Kochi, India · Ship Repair Yard
FAQ
01.Can I use EH32 steel plate as a direct replacement for AH32 or DH32?
Technically yes, but economically no.
All three grades share the same minimum yield strength (315 MPa). However, EH32 undergoes impact testing at -40°C, while AH32 is tested at 0°C and DH32 at -20°C.
Upgrading (AH32 → EH32): Safe, but you overpay for unnecessary low-temperature toughness if your vessel never sails in Arctic waters.
Downgrading (EH32 → AH32): Strictly prohibited by classification societies (ABS, DNV, LR) for hull components operating in cold regions.
Recommendation: Always follow the ship design specification. If you need help deciding between AH32 vs DH32 vs EH32, [contact our technical team] for a free material selection review.
02.What certifications are required for EH32 shipbuilding steel plates?
Every EH32 plate must be accompanied by a 3.1 Mill Test Certificate (MTC) per EN 10204, verified by an independent classification society. We provide:
ABS, DNV, LR, BV, CCS, NK, RINA approval stamps
Full chemical ladle analysis (C, Mn, Si, Nb, V, etc.)
Charpy V-Notch impact values at -40°C (minimum 31J average)
Ultrasonic testing (UT) according to ASTM A578 or EN 10160 upon request.
03.Is welding EH32 more difficult than welding AH32 or DH32?
Not with the correct procedure. EH32 contains grain-refining elements (Nb, V) and a lower carbon equivalent (Ceq ≤ 0.38%), which actually improves weldability compared to older high-strength steels. However, three precautions are essential:
| Parameter | Requirement for EH32 | Why |
|---|---|---|
| Preheat temperature | 50–100°C (minimum) | Prevents hydrogen-induced cold cracking |
| Heat input | ≤ 5.0 kJ/mm | Preserves -40°C impact toughness in HAZ |
| Consumables | Low-hydrogen electrodes (E7016-E) | Matches strength and low-temperature ductility |
For AH32 (0°C service), preheating is often optional. For DH32 (-20°C service), moderate control is needed. For EH32, strict adherence to a qualified Welding Procedure Specification (WPS) is mandatory.
04.Why is EH32 more expensive than AH32 and DH32?
The price hierarchy reflects alloying cost and quality control rigor:
AH32 (lowest price): Basic grain refinement, impact tested at 0°C only. Suitable for internal structures and mild climates.
DH32 (mid price): Requires fine grain practice and -20°C impact testing. Additional deoxidation adds cost.
EH32 (highest price):
Chemistry: Tighter niobium (Nb) and vanadium (V) ranges for -40°C performance
Rolling: TMCP or normalizing required, not as-rolled
Testing: Every plate lot undergoes -40°C Charpy testing (more expensive than 0°C or -20°C)
Inspection: Often requires third-party surveyor witnessing
Typical premium: EH32 costs roughly 12–18% more than DH32 and 25–30% more than AH32. However, using a lower grade in an Arctic environment risks catastrophic brittle fracture – a cost far exceeding any material savings.
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