CCS EH36 Shipbuilding Steel Coil
CCS EH36 Shipbuilding Steel Coil - High-Strength Structural Plate for Marine Engineering
Detailed data for CCS EH36 steel coil: chemical composition, mechanical properties at -40°C, thermal and electrical properties, international equivalents from ABS, DNV, LR, and similar alternatives.
Thermomechanical controlled processing (TMCP), controlled rolling, normalizing; suitable for cold bending, welding, cutting
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CCS EH36 Shipbuilding Steel Coil Introduction
CCS EH36 shipbuilding steel is a high-strength hull structural steel certified by the China Classification Society. It is primarily used for offshore and marine constructions requiring excellent toughness at low temperatures, with a minimum yield strength of 355 MPa and Charpy V-notch impact energy of 34J longitudinal at -40°C.
- Fully killed fine-grain steel, often produced through thermomechanical controlled processing (TMCP) or normalizing.
- Excellent weldability and cold-forming properties suitable for critical ship structures.
- Available as coils, plates, and sections in a wide range of thicknesses, used in deck plating, hull shells, and stiffeners.
CCS EH36 Shipbuilding Steel Coil Chemical Composition
Chemical composition according to CCS & GB/T 712 standards. EH36 is a fine-grain fully killed steel with controlled microalloying elements (Nb, V, Ti, Al) to ensure grain refinement and high toughness. Carbon equivalent (CEV) usually limited to 0.38%–0.43% to ensure weldability.
| Element | Specified Value (max, unless range) | Remarks |
|---|---|---|
| C | ≤0.18 | |
| Si | 0.10–0.50 | |
| Mn | 0.90–1.60 | |
| P | ≤0.025 | |
| S | ≤0.025 | |
| Cr | ≤0.20 | residual element |
| Ni | ≤0.40 | residual element |
| Mo | ≤0.08 | residual element |
| Cu | ≤0.35 | residual element |
| Nb | 0.02–0.05 | microalloying, grain refinement |
| V | 0.05–0.10 | microalloying |
| Ti | ≤0.02 | optional, grain refinement |
| Al (total) | ≥0.020 | fully killed requirement |
| N | ≤0.012 | when aluminium is present |
| CEV | ≤0.38 (for thickness ≤50 mm) | carbon equivalent, depending on thickness |
CCS EH36 Shipbuilding Steel Coil Thermal and Electrical Physical Properties
These physical properties are typical for EH36 shipbuilding steel and are not mandatory in the delivery specification. They are provided to support engineering design.
| Property | Typical Value | Unit | Conditions / Remarks |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | ambient temperature |
| Elastic modulus (E) | 200–210 | GPa | room temperature |
| Shear modulus (G) | ~80 | GPa | room temperature |
| Poisson's ratio (ν) | 0.3 | within elastic range | |
| Thermal expansion coefficient (α) | 11.5 (20–100°C) 12.5 (20–200°C) | 10⁻⁶/K | mean coefficient |
| Thermal conductivity (λ) | ~50 | W/m·K | at 20°C |
| Specific heat capacity (cp) | ~460 | J/kg·K | at 20°C |
| Electrical resistivity (ρ_e) | ~0.16 | µΩ·m | at 20°C |
CCS EH36 Shipbuilding Steel Coil Mechanical Properties
Mechanical properties are valid for delivery condition TMCP or normalized. EH36 is tested at -40°C for impact toughness. Tensile properties according to GB/T 712 / CCS rules. For thicknesses ≤50 mm, the requirements are shown. Values for longitudinal tensile test specimens.
| Property | Typical Requirement | Unit | Test Conditions / Remarks |
|---|---|---|---|
| Yield strength (ReH) | ≥355 | MPa | thickness ≤50 mm |
| Tensile strength (Rm) | 490–630 | MPa | thickness ≤50 mm |
| Elongation (A) | ≥21 | % | gauge length 5.65√So, longitudinal |
| Charpy V-notch impact energy (KV2) | ≥34 (longitudinal) | J | at -40°C |
| Charpy V-notch impact energy (KV2) | ≥24 (transverse) | J | at -40°C |
| Bend test (diameter) | 3a (for thickness ≤25 mm) | bend angle 180° | a = specimen thickness |
CCS EH36 Shipbuilding Steel Coil Fully Equivalent Material Standards and Substitute Grades
| Country / Region | Standard / Rules | Grade | Remarks |
|---|---|---|---|
| China | CCS Rules | EH36 | identical requirements |
| China | GB/T 712 | EH36 | identical requirements |
| International | IACS UR W11 | EH36 | common standard for all IACS members |
| United States | ABS Rules | EH36 | equivalent |
| Norway / Germany | DNV Rules | EH36 (VL E36) | equivalent |
| United Kingdom | LR Rules | EH36 | equivalent |
| France | BV Rules | EH36 | equivalent |
| Japan | NK Rules | EH36 | equivalent |
| South Korea | KR Rules | EH36 | equivalent |
| Italy | RINA Rules | EH36 | equivalent |
CCS EH36 Shipbuilding Steel Coil Application Introduction
CCS EH36 steel is primarily intended for structural applications in shipbuilding and offshore engineering where high strength and excellent low-temperature toughness are mandatory. Its good weldability and formability allow efficient fabrication of complex components.
Product Applications: Container ships, bulk carriers, tankers, LNG / LPG carriers, Icebreakers and polar supply vessels, Offshore platform decks and legs, Floating production storage and offloading (FPSO) units, Jack-up rig hulls
Processed into products: Hull plates and shell plating, Deck stringer and sheer strake plates, Longitudinal stiffeners and girders, Transverse frames and web frames, Bulkhead panels, Hatch covers and coamings, Crane pedestals and equipment foundations, Offshore structural nodes and tubular joints
Application industries: Marine engineering and shipbuilding, Offshore oil & gas platforms, Renewable energy – offshore wind turbine foundations, Port and harbor construction, Naval and defense vessels
CCS EH36 Shipbuilding Steel Coil Similar / Alternative Materials with Close Performance
| Country / Region | Standard / Rules | Grade | Remarks |
|---|---|---|---|
| China / International | GB/T 712 / CCS | DH36 | lower toughness: impact at -20°C, otherwise same strength |
| China / International | GB/T 712 / CCS | FH36 | higher toughness: impact at -60°C |
| China / International | GB/T 712 / CCS | EH40 | higher strength: min YS 390 MPa, same impact temperature -40°C |
| USA / International | ASTM A131 / IACS | EH36 | equivalent, same strength and toughness |
| Europe | EN 10025-4 | S355MLO (offshore) | for offshore structures, similar yield but with specific CTOD requirements |
| Russia | GOST R 52927 | E36 | similar shipbuilding steel, may differ in chemical limits |
Notes:
EH36 steel shall be supplied with certificates issued by the classification society. Welding procedures must be qualified for the thickness and heat input range. Preheat and interpass temperature control may be necessary depending on plate thickness to avoid hydrogen cracking. Carbon equivalent (CEV) limits are tightened for thicker sections; typical maximum CEV for ≤50 mm is 0.38%, and for 50–70 mm is 0.40%. For optional high heat input welding, additional testing such as CTOD may be specified for offshore structures.
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