ASTM A131 Steel Rod/Bar, grade E

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

ASTM A131 Steel, grade E Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A131/A131M Structural Steel for Ships, Grade E** --- #### **1. Product Overview** ASTM A131 Grade E represents the **highest strength level** within the conventional shipbuilding steel grades, designed for critical structural applications requiring superior toughness in extremely low-temperature service environments. This fully-killed, fine-grain processed steel delivers exceptional impact properties at temperatures as low as -40°C (-40°F), making it particularly suitable for polar vessels, icebreakers, and offshore structures operating in Arctic and Antarctic conditions. Grade E maintains the same minimum yield strength as other A131 grades (235 MPa) but offers significantly enhanced toughness properties through strict chemical control and specialized manufacturing processes. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A131/A131M Grade E** | | **UNS Number** | **K02602** | | **ABS (American Bureau of Shipping)** | **Grade E** | | **Lloyd's Register** | **Grade E** | | **DNV** | **Grade E** | | **BV (Bureau Veritas)** | **Grade E** | | **EN Standards** | **E/EH Grade E** (Equivalent) | | **Japanese (JIS)** | **KE Class** | --- #### **3. Chemical Composition (Weight %)** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.18 max | | **Manganese (Mn)** | 0.70-1.35 | | **Phosphorus (P)** | 0.025 max | | **Sulfur (S)** | 0.025 max | | **Silicon (Si)** | 0.10-0.35 | | **Copper (Cu)** | 0.35 min (when specified) | | **Aluminum (Al)** | 0.015 min (for fine grain practice) | | **Niobium (Nb)** | 0.02-0.05 (when used) | | **Vanadium (V)** | 0.05-0.10 (when used) | | **Iron (Fe)** | Balance | **Key Composition Features:** - **Restricted Carbon Content**: Maximum 0.18% for enhanced weldability and toughness - **Microalloying Elements**: Optional addition of Nb/V for grain refinement and precipitation strengthening - **Stringent Impurity Control**: Lower P and S limits compared to lower grades - **Fine Grain Practice**: Mandatory Al treatment with minimum 0.015% --- #### **4. Mechanical Properties** **Tensile Properties:** - **Tensile Strength**: 400-490 MPa (58-71 ksi) - **Yield Strength**: 235 MPa (34 ksi) min - **Elongation in 50 mm (2 in)**: 25% min - **Elongation in 200 mm (8 in)**: 22% min - **Yield to Tensile Ratio**: 0.60-0.75 typical **Impact Properties:** - **Charpy V-Notch Test Temperature**: **-40°C (-40°F)** - **Minimum Impact Energy**: **27 J (20 ft-lbf)** - **Test Frequency**: Each plate as-rolled or each heat treatment charge - **Sampling Location**: Mid-thickness at quarter width --- #### **5. Physical Properties** | Property | Value | |----------|-------| | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | **Modulus of Elasticity** | 200 GPa (29,000 ksi) | | **Shear Modulus** | 77 GPa (11,200 ksi) | | **Poisson's Ratio** | 0.29 | | **Thermal Conductivity** | 50.0 W/m·K at 20°C | | **Coefficient of Thermal Expansion** | 11.3 × 10⁻⁶ /K (20-100°C) | | **Specific Heat Capacity** | 450 J/kg·K | --- #### **6. Product Applications** **Critical Marine Applications:** - Icebreaker hull plating and framing - Polar class vessel ice belts - Offshore drilling rigs in Arctic regions - LNG carrier containment system support structures - Ice-strengthened bulk carriers and tankers **Specific Component Usage:** - Sheer strakes and stringers in ice-going vessels - Bow and stern framing in ice-class ships - Deck plating in way of mooring equipment - Critical joints and highly stressed areas - Plating subject to ice impact and abrasion --- #### **7. Fabrication Characteristics** **Welding Performance:** - **Excellent weldability** with low carbon equivalent (typically ≤ 0.38%) - Recommended processes: SMAW, FCAW, SAW, GMAW - **Pre-heat Requirements**: 50-100°C depending on thickness and ambient conditions - **Filler Metal Selection**: AWS E7018, E81T1-Ni2, or nickel-containing electrodes - **Interpass Temperature**: Maximum 200°C recommended **Forming & Machining:** - Good cold forming characteristics down to -20°C - Normalized condition preferred for severe forming operations - Excellent machinability with proper tool geometry - Suitable for cold bending and rolling operations **Heat Treatment Options:** - Normalized or normalized-rolled condition - Thermo-mechanical controlled processing (TMCP) available - 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 or heat treatment charge - **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 - **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 E provides the highest level of low-temperature toughness in the A131 standard - Mandatory fine grain practice ensures consistent through-thickness properties - Requires certified welding procedures for low-temperature applications - Special storage and handling recommended to prevent contamination - 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 E Specification Dimensions Size： Diameter 20-1000 mm Length <4223 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 E Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A131 Steel Rod, grade E -:- 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 Rod 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 694 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