ASTM A131 Steel Sheet,Plate, Grade AH36

ASTM A131 Steel Sheet/Plate, Grade AH36 Product Information -:- For detailed product information, please contact sales. -: ASTM A131 Steel Sheet/Plate, Grade AH36 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A131 Steel, Grade AH36 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A131 Grade AH36 Steel** **ASTM A131 Grade AH36** is a high-strength structural steel specifically designed for marine and offshore applications, offering superior mechanical properties for critical shipbuilding components. As part of the ASTM A131 specification for "Structural Steel for Ships," this grade provides a minimum yield strength of **355 MPa (51 ksi)**, making it suitable for demanding marine environments where weight reduction and structural efficiency are essential. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A131/A131M** - "Standard Specification for Structural Steel for Ships" **Grade Classification:** - **Grade AH36** - High-strength steel with 355 MPa minimum yield strength - Other grades in A131 series: A, B, D, DS, E, CS, AH32, DH32, DH36, EH32, EH36 **International Equivalents:** - **EN 10025-4**: S355N - **JIS G3106**: SM490Y - **ABS Rules**: AH36 (American Bureau of Shipping) - **LR Standards**: AH36 (Lloyd's Register) - **DNV GL**: AH36 --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A131 Grade AH36: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.18 | | Manganese (Mn) | 0.90-1.60 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.035 | | Silicon (Si) | 0.50 | | Aluminum (Al) | 0.015 (min. for fine grain practice) | | Niobium (Nb) | 0.02-0.05 | | Vanadium (V) | 0.05-0.10 | | Copper (Cu) | 0.35 (optional) | **Key Composition Features:** - **Optimized Carbon Content**: Balances strength and weldability - **Advanced Microalloying**: Niobium and vanadium for precipitation strengthening - **Fine Grain Practice**: Aluminum treatment for enhanced toughness - **Optional Copper**: Improves atmospheric corrosion resistance --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (for thicknesses ≤ 50 mm):** | Property | Value | |---|---| | **Tensile Strength** | 490-620 MPa (71-90 ksi) | | **Yield Strength (min.)** | 355 MPa (51 ksi) | | **Elongation in 2" (min.)** | 19% | | **Elongation in 8" (min.)** | 21% | **Impact Toughness Properties:** - **Charpy V-Notch Test Temperature**: -20°C (-4°F) - **Minimum Impact Energy**: 34 J (25 ft-lbf) - **Through-Thickness Properties**: Z-quality available when specified **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Poisson's Ratio**: 0.29 - **Thermal Conductivity**: 50.2 W/m·K - **Coefficient of Thermal Expansion**: 11.8 × 10⁻⁶/°C --- #### **4. Product Applications** **Shipbuilding Applications:** - Main hull structural members - Critical deck plating - Primary bulkhead components - Keel and keelson plates **Offshore Structures:** - Jack-up rig leg sections - Semi-submersible platform components - FPSO (Floating Production Storage and Offloading) hulls - Offshore accommodation modules **Specialized Marine Vessels:** - Container ship hull structures - LNG carrier components - Cruise ship primary structures - Naval vessel construction **Marine Infrastructure:** - Heavy-duty quay walls - Offshore wind turbine foundations - Ship lift structures - Dry dock components --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Good Weldability**: With controlled procedures - **Preheat Requirements**: 75-175°C depending on thickness and restraint - **Recommended Processes**: FCAW, SAW, GMAW - **Filler Metals**: E71T-1, EM12K or equivalent **Forming & Cutting:** - **Moderate Formability**: Suitable for shipyard forming operations - **Cold Bending**: Possible with proper tooling and radii - **Cutting Methods**: Plasma, laser, and waterjet cutting preferred - **Edge Preparation**: Critical for welding quality **Corrosion Performance:** - **Marine Environment**: Requires comprehensive coating systems - **Corrosion Allowance**: Typically included in design calculations - **Coating Compatibility**: Excellent with marine coating systems - **Maintenance**: Regular inspection and maintenance required **Quality Assurance:** - **Classification Society Approval**: Mandatory for marine applications - **Extended Testing**: Impact tests at specified temperatures - **Non-Destructive Testing**: UT, RT, MT, PT as required - **Documentation**: Full certification with classification society approval --- ### **Technical Summary** ASTM A131 Grade AH36 represents an advanced high-strength structural steel specifically engineered for the most demanding marine and offshore applications. With a minimum yield strength of 355 MPa, this grade offers significant advantages in weight reduction and structural efficiency compared to conventional shipbuilding steels, contributing to improved vessel performance and payload capacity. The sophisticated microalloying system, featuring precise control of niobium and vanadium, provides enhanced strength through precipitation hardening while maintaining excellent toughness properties. The fine grain practice ensures consistent through-thickness properties and reliable performance in the dynamic loading conditions encountered in marine service. Grade AH36's superior mechanical properties make it particularly valuable for large vessel construction, offshore platforms, and specialized marine structures where structural efficiency, safety, and reliability are critical. The material's compliance with international classification society standards ensures consistent quality and performance across global shipbuilding projects. The proven track record of ASTM A131 Grade AH36 in critical marine applications, combined with its excellent fabrication characteristics and classification society approvals, has established it as a preferred choice for modern shipbuilders and marine engineers designing and constructing vessels and offshore structures for the most challenging marine environments. -:- For detailed product information, please contact sales. -: ASTM A131 Steel, Grade AH36 Specification Dimensions Size： Diameter 20-1000 mm Length <4326 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: ASTM A131 Steel, Grade AH36 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A131 Steel Sheet,Plate, Grade AH36 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A131 Steel Sheet,Plate, Grade AH36 -:- For detailed product information, please contact sales. -:

Packing of ASTM A131 Steel Sheet/Plate, Grade AH36 -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Sheet/Plate drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 797 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition