ASTM A131 Steel Capillary, grade B

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

ASTM A131 Steel, grade B Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A131 / A131M Structural Steel for Ships, Grade B** --- #### **Product Overview** ASTM A131 Grade B is a carbon-manganese steel plate specifically designed for shipbuilding applications requiring higher strength than Grade A. As part of the ASTM A131 standard for "Structural Steel for Ships," Grade B offers improved mechanical properties while maintaining good weldability and formability, making it suitable for critical structural components in marine environments. --- #### **1. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A131/A131M Grade B** | | **UNS Number** | **K02401** | | **ABS (American Bureau of Shipping)** | **Grade B** | | **Lloyd's Register** | **Grade B** | | **DNV** | **Grade B** | | **EN Standards** | **EE Grade B** (Equivalent) | --- #### **2. Chemical Composition (Weight %)** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.21 max | | **Manganese (Mn)** | 0.60-1.20 | | **Phosphorus (P)** | 0.035 max | | **Sulfur (S)** | 0.035 max | | **Silicon (Si)** | 0.10-0.35 | | **Copper (Cu)** | 0.35 min (when specified) | | **Iron (Fe)** | Balance | **Key Composition Notes:** - Balanced carbon-manganese ratio for enhanced strength - Controlled residual elements for improved toughness - Optional copper addition for corrosion resistance --- #### **3. 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 **Impact Properties:** - **Charpy V-Notch Test Temperature**: 0°C (32°F) - **Minimum Impact Energy**: 20 J (15 ft-lbf) --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | **Modulus of Elasticity** | 200 GPa (29,000 ksi) | | **Poisson's Ratio** | 0.29 | | **Thermal Conductivity** | 51.9 W/m·K | | **Coefficient of Thermal Expansion** | 11.5 × 10⁻⁶ /K | | **Specific Heat Capacity** | 470 J/kg·K | --- #### **5. Product Applications** **Primary Marine Applications:** - Ship hull structural members - Main deck plating - Watertight bulkheads - Longitudinal framing - Transverse frames - Stringers and girders **Specific Component Usage:** - Shell plating in midship regions - Strength deck plating - Bottom plating - Side framing members - Primary support structures --- #### **6. Fabrication Characteristics** **Welding Performance:** - Excellent weldability using all common processes - SMAW (Shielded Metal Arc Welding) - FCAW (Flux-Cored Arc Welding) - SAW (Submerged Arc Welding) - GMAW (Gas Metal Arc Welding) - Typically requires no pre-heat for thicknesses up to 25 mm **Forming Operations:** - Good cold forming capability - Suitable for bending and rolling - Excellent punchability and shearability **Heat Treatment:** - Normally supplied in as-rolled condition - Normalizing available when specified - Stress relieving when required --- #### **7. Quality Assurance & Testing** **Mandatory Tests (per ASTM A131):** - Chemical analysis (ladle analysis) - Tension test - Charpy V-notch impact test - Bend test (when specified) **Additional Tests (when specified):** - Ultrasonic examination - Fine grain practice verification - Through-thickness testing --- #### **8. Corrosion Performance** - **Marine Atmosphere**: Good resistance with proper coatings - **Seawater Immersion**: Requires protective coatings/cathodic protection - **Corrosion Rate**: ~0.1-0.3 mm/year in splash zone - **Recommended Protection**: Epoxy coatings + cathodic protection --- #### **9. Available Product Forms** - Plates: 4.5 mm to 200 mm thickness - Sheets: Up to 4.5 mm thickness - Various widths and lengths per mill capability --- **Technical Notes:** - Grade B provides 25% higher yield strength than commercial mild steel - Suitable for service temperatures down to 0°C (32°F) - Must comply with applicable regulatory body rules (ABS, DNV, etc.) - Proper storage and handling required to prevent corrosion *This information is for reference purposes. For complete requirements and current specifications, consult the latest ASTM A131/A131M standard and applicable regulatory body rules.* -:- For detailed product information, please contact sales. -: ASTM A131 Steel, grade B Specification Dimensions Size： Diameter 20-1000 mm Length <4221 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 B Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A131 Steel Capillary, grade B -:- 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 Capillary 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 692 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