Description

Technical Parameters

CCS EH40 Shipbuilding Steel Plate – High-Strength Marine Steel for Arctic and Extreme Cold Environments

CCS EH40 is a higher-strength hull structural steel certified by the China Classification Society (CCS). The "E" in the grade designation indicates impact testing at -40°C, which distinguishes it from AH40 (0°C) and DH40 (-20°C). "H" denotes higher-strength steel, and "40" refers to the minimum yield strength of 40 kgf/mm² (approximately 390 MPa).

EH40 is produced using killed steel practices with fine grain treatment and microalloying elements such as niobium, vanadium, and titanium to achieve the required mechanical properties. The steel is primarily supplied in normalized (N) or TMCP (Thermo-Mechanical Controlled Processing) condition.

CCS EH40 is designed for ship hull structures operating in Arctic and polar regions where temperatures can drop below -40°C. The material offers the same 390 MPa yield strength as AH40 and DH40 but with reliable impact toughness at significantly lower temperatures. According to CCS requirements, EH40 plates must pass Charpy V-notch impact testing at -40°C with minimum average energy of 41 J for longitudinal specimens and 27 J for transverse specimens on plates up to 50mm thickness.

Quality Assurance | Fully Certified & Traceable

One-stop steel procurement

Certifications: We supply ABS EH40, CCS EH40, LR EH40, DNV-GL EH40, and BV EH40.

Traceability: Each plate is stamped with grade, heat number, and dimensions.

Inspection: Third-party inspections (SGS, BV) are welcome at our loading port.

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Key Specifications & Tolerances

Chemical Composition (Ladle Analysis)

Element	Composition (%)
Carbon (C)	≤ 0.18
Manganese (Mn)	0.90 – 1.60
Silicon (Si)	0.10 – 0.50
Phosphorus (P)	≤ 0.035
Sulfur (S)	≤ 0.035
Aluminum (Als)	≥ 0.015
Niobium (Nb)	0.02 – 0.05
Vanadium (V)	0.05 – 0.10
Titanium (Ti)	≤ 0.02
Copper (Cu)	≤ 0.35
Chromium (Cr)	≤ 0.20
Nickel (Ni)	≤ 0.40
Molybdenum (Mo)	≤ 0.08

Mechanical Properties

Property	Value
Yield Strength (min)	390 MPa (57 ksi)
Tensile Strength	510 – 650 MPa (74 – 94 ksi)
Elongation (min, on 50mm gauge)	20%
Impact Test Temperature	-40°C
Impact Energy (Longitudinal, t≤50mm)	≥ 41 J
Impact Energy (Transverse, t≤50mm)	≥ 27 J

Available Dimensions

Parameter	Range
Thickness	3mm – 300mm (up to 400mm upon request)
Width	1200mm – 4200mm
Length	3000mm – 18000mm

Condition of Supply

Thickness	Condition
t ≤ 12mm	Normalized, TMCP, or Quenched & Tempered
12mm < t ≤ 50mm	Normalized or TMCP
50mm < t ≤ 100mm	Normalized (required)

Applications | Where is EH40 Steel Used?

ship-hull-construction-keel-bilge-strakes-marine-steel

Arctic and Polar Vessels: Icebreakers, polar supply vessels, Arctic offshore support ships.

Ice Class Bulk Carriers: Hull structures requiring reliable impact toughness at extreme low temperatures.

Offshore Platforms: Fixed platforms and FPSO units in Arctic regions.

Container Ships: Upper deck structures and hatch coamings where brittle crack arrest properties may be required.

offshore-platform-jack-up-rig-semi-submersible-fpso-steel-structure

marine-vessel-components-cargo-hold-hatch-cover-tanker-deck

Naval Vessels: High-performance marine craft with polar operational requirements.

LNG Carriers: Cargo containment systems operating in extreme cold.

ship-repair-retrofit-marine-hull-steel-plate-replacement

AH40, DH40, EH40, FH40 – Comparison

Grade	Impact Test Temperature	Typical Application
AH40	0°C	General ship structures, moderate climate vessels
DH40	-20°C	Cold ocean waters, ice class vessels
EH40	-40°C	Arctic and polar region vessels, icebreakers
FH40	-60°C	Extreme low-temperature environments

Impact Energy Requirements by Thickness

Thickness Range	Longitudinal (J)	Transverse (J)
t ≤ 50mm	41	27
50mm < t ≤ 70mm	46	31
70mm < t ≤ 100mm	55	37

Quality Assurance and Certification

CCS EH40 plates can be certified by multiple international classification societies:

CCS (China Classification Society)

ABS (American Bureau of Shipping)

LR (Lloyd's Register)

DNV (Det Norske Veritas)

BV (Bureau Veritas)

NK (Nippon Kaiji Kyokai)

KR (Korean Register)

RINA (Registro Italiano Navale)

Additional Testing and Services

Ultrasonic Testing (UT): ASTM A435, A577, A578

Z-direction Testing: Z15, Z25, Z35

Charpy V-Notch Impact Test: At -40°C as standard

Third-Party Inspection: SGS, TUV, or other independent inspectors

Mill Test Certificate: EN 10204 Format 3.1/3.2

Surface Treatment: Shot blasting and painting available upon request

Packaging & Delivery

Packaging: Standard export seaworthy packing or as per customer requirements

Delivery Time: 7 days for stock items, 30–50 days for production orders

Loading Ports: Shanghai, Tianjin, Qingdao

why choose us?

Stock Availability: We maintain 5,000+ tons of EH40 shipbuilding plate in standard sizes (6m, 9m, 12m) ready for immediate dispatch.

Custom Cutting: We offer profile cutting, beveling, and services to save you fabrication time.

Fast Logistics: Efficient shipping via break bulk or container to major ports worldwide (Rotterdam, Houston, Singapore, Dubai).

Competitive Pricing: Direct mill cooperation means no middlemen markups.

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User Evaluation

We specified CCS EH40 for the shell plating of two Arctic-class vessels. The -40°C impact tests were consistently above 50 J. Normalized plates up to 60mm thickness arrived flat and within tolerance. Third-party inspectors approved all mill certificates.

Mr. Chen Wei

Singapore · Large Shipbuilding and Repairing Group

Used CCS EH40 for ice belt plating on a new icebreaker. The material performed well during winter fabrication with proper preheat controls. Chemical composition stayed consistent across all heat numbers. Would order again.

Ms. Nguyen Thi Hong

Haiphong · Shipbuilding Group of Vietnam

We upgraded from EH36 to EH40 for a polar research vessel to reduce plate thickness. The 390 MPa yield strength delivered the expected weight savings. Welding required careful heat input management, but results were satisfactory.

Mr. Rajesh Kumar

Kochi, India · Ship Repair Yard

FAQ

01.What does "EH40" stand for in shipbuilding steel?

The "E" indicates impact testing at -40°C. "H" stands for higher-strength steel. "40" refers to the minimum yield strength of 40 kgf/mm², approximately 390 MPa in metric units.

02.What is the difference between EH40 and DH40?

Both have the same minimum yield strength (390 MPa) and tensile strength (510 – 650 MPa). The difference is the impact test temperature: DH40 is tested at -20°C, while EH40 is tested at -40°C. EH40 is required for vessels operating in Arctic and polar environments where temperatures drop below -20°C.

03.What heat treatment is required for CCS EH40 plates?

For thickness up to 12mm, normalized, TMCP, or quenched & tempered condition may be acceptable. For thicknesses between 12mm and 50mm, normalized or TMCP is typical. For thicknesses above 50mm, classification rules require normalized treatment for each plate to ensure uniform mechanical properties through the full thickness.

04.What preheating is required for welding CCS EH40?

EH40 has a higher carbon equivalent than normal-strength grades. For thicknesses under 25mm, preheat around 75–100°C is typical. For thicker sections (above 40mm), preheat in the 100–150°C range is common. Low-hydrogen welding consumables are required. Always follow an approved welding procedure specification with controlled heat input.

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