ASTM A131 Steel Tube,Pipe, grade EH32

ASTM A131 Steel Tube, grade EH32 Product Information -:- For detailed product information, please contact sales. -: ASTM A131 Steel Tube, grade EH32 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A131 Steel, grade EH32 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A131/A131M Structural Steel for Ships, Grade EH32** --- #### **1. Product Overview** ASTM A131 Grade EH32 is a **high-strength, low-temperature service** steel plate designed for shipbuilding applications requiring enhanced mechanical properties and superior toughness at extremely low temperatures. The "E" indicates its impact testing temperature category (-40°C/-40°F), while "H32" signifies high strength with a specified minimum yield strength of 315 MPa (32 kgf/mm²). This grade combines high strength with exceptional low-temperature toughness, making it ideal for polar vessels, ice-class ships, and offshore structures operating in Arctic conditions. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A131/A131M Grade EH32** | | **ABS (American Bureau of Shipping)** | **Grade EH32** | | **Lloyd's Register** | **Grade EH32** | | **DNV** | **Grade EH32** | | **European Norm (EN)** | **EH32** (EN 10225) | | **Chinese GB** | **EH32** (GB 712) | | **Japanese (JIS)** | **KE32** | | **Korean (KS)** | **KE32** | --- #### **3. Chemical Composition (Weight %)** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.16 max | | **Manganese (Mn)** | 0.90-1.60 | | **Phosphorus (P)** | 0.025 max | | **Sulfur (S)** | 0.025 max | | **Silicon (Si)** | 0.10-0.50 | | **Aluminum (Al)** | 0.015 min (for fine grain practice) | | **Niobium (Nb)** | 0.02-0.05 | | **Vanadium (V)** | 0.05-0.10 | | **Titanium (Ti)** | 0.02 max | | **Copper (Cu)** | 0.35 max | | **Nickel (Ni)** | 0.40 max (when specified) | | **Chromium (Cr)** | 0.20 max | | **Molybdenum (Mo)** | 0.08 max | | **Iron (Fe)** | Balance | **Key Composition Features:** - **Restricted Carbon Content**: Maximum 0.16% for enhanced weldability and toughness - **Microalloying Elements**: Nb, V, Ti for grain refinement and precipitation strengthening - **Fine Grain Practice**: Mandatory Al treatment with minimum 0.015% - **Carbon Equivalent (Ceq)**: Typically ≤ 0.38% for excellent weldability - **Optional Nickel Addition**: For improved low-temperature toughness --- #### **4. Mechanical Properties** **Tensile Properties:** - **Tensile Strength**: 470-590 MPa (68-86 ksi) - **Yield Strength**: 315 MPa (46 ksi) min - **Elongation in 50 mm (2 in)**: 22% min - **Yield to Tensile Ratio**: 0.67-0.80 typical **Impact Properties:** - **Charpy V-Notch Test Temperature**: **-40°C (-40°F)** - **Minimum Impact Energy**: **34 J (25 ft-lbf)** - **Test Direction**: Longitudinal and transverse as specified - **Test Location**: Surface and quarter-thickness positions --- #### **5. Physical Properties** | Property | Value | |----------|-------| | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | **Modulus of Elasticity** | 205 GPa (29,700 ksi) | | **Shear Modulus** | 80 GPa (11,600 ksi) | | **Poisson's Ratio** | 0.29 | | **Thermal Conductivity** | 47.0 W/m·K at 20°C | | **Coefficient of Thermal Expansion** | 11.8 × 10⁻⁶ /K (20-100°C) | | **Specific Heat Capacity** | 450 J/kg·K | | **Electrical Resistivity** | 0.22 μΩ·m | --- #### **6. Product Applications** **Critical Marine Applications:** - Icebreaker hull plating and framing - Polar class vessel ice belts - Arctic offshore drilling rig structures - LNG carrier containment system support - Ice-strengthened container ships and bulk carriers **Specific Component Usage:** - Sheer strakes in ice-going vessels - Bow and stern framing in ice-class ships - Main deck plating in way of openings - Bottom plating in slamming areas - Critical joints and highly stressed areas --- #### **7. Fabrication Characteristics** **Welding Performance:** - **Excellent weldability** with low carbon equivalent - Recommended processes: FCAW, SAW, GMAW - **Pre-heat Requirements**: 75-150°C depending on thickness - **Interpass Temperature**: Maximum 200°C - **Carbon Equivalent (Ceq)**: 0.35-0.38% typical - **Filler Metal Selection**: AWS E81T1-K2, E91T1-K3 or nickel-containing electrodes **Forming Operations:** - Good cold forming characteristics down to -20°C - Normalized condition preferred for severe forming - Suitable for cold bending and rolling operations - Minimum bending radii per classification society rules **Heat Treatment:** - Typically supplied in normalized or TMCP condition - Thermo-mechanical controlled processing (TMCP) commonly used - Stress relieving: 550-600°C for 1 hour per 25 mm thickness --- #### **8. Quality Assurance & Testing** **Mandatory Tests:** - Ladle chemical analysis for each heat - Product analysis from each plate - Tension tests from each plate - **Charpy V-notch tests at -40°C** from each plate - Bend tests when specified **Additional Requirements:** - Fine austenitic grain size verification (ASTM 5-8) - Ultrasonic testing per ASTM A578 Level II - Through-thickness testing when specified - Hardness surveys for welding procedure qualification --- #### **9. Corrosion & Service Performance** - **Low Temperature Toughness**: Maintains ductility down to -60°C - **Ice Abrasion Resistance**: Superior to conventional grades - **Corrosion Fatigue**: Enhanced performance in cold seawater - **Cryogenic Service**: Suitable for LNG carrier applications - **Recommended Coating Systems**: High-build epoxy with ice-resistant properties --- #### **10. Available Product Forms & Sizes** - Plates: 6 mm to 150 mm thickness - Wide plates: Up to 4500 mm width - Standard lengths: 6000-18000 mm - Special sizes available per mill capability --- **Technical Notes:** - Grade EH32 provides the optimal combination of high strength and low-temperature toughness - TMCP processing ensures excellent through-thickness properties - Requires certified welding procedures for low-temperature applications - Special attention needed for welding in cold weather conditions - Mill test certificates must include impact test results at -40°C *This information is for reference purposes. For complete technical requirements, consult the latest ASTM A131/A131M specification and applicable classification society rules (ABS, DNV, LR, etc.). Not for design purposes - always verify properties with current certified mill test reports.* -:- For detailed product information, please contact sales. -: ASTM A131 Steel, grade EH32 Specification Dimensions Size： Diameter 20-1000 mm Length <4225 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 EH32 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A131 Steel Tube, grade EH32 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A131 Steel Tube, grade EH32 -:- For detailed product information, please contact sales. -:

Packing of ASTM A131 Steel Tube, grade EH32 -:- 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 Tube 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 696 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