ASTM A446 Steel Foil/Strip, grade B

ASTM A446 Steel Foil, grade B Product Information -:- For detailed product information, please contact sales. -: ASTM A446 Steel Foil, grade B Synonyms -:- For detailed product information, please contact sales. -:

ASTM A446 Steel, grade B Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A446 Steel, Grade B** --- #### **1. Product Overview** ASTM A446 Grade B is a **high-strength zinc-coated (galvanized) structural steel sheet** designed for demanding applications in corrugated steel pipe, structural plate structures, and other civil engineering applications requiring enhanced mechanical properties. As an intermediate grade in the A446 standard, Grade B offers improved strength characteristics compared to Grade A while maintaining good formability and excellent corrosion resistance through hot-dip galvanizing. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A446 Grade B** | | **UNS Number** | **K02401** | | **ISO International Standard** | **ISO 3575** | | **European Norm (EN)** | **EN 10346 DX52D+Z** | | **Japanese (JIS)** | **G 3302 SGH340** | | **Chinese GB** | **GB/T 2518** | --- #### **3. Chemical Composition (Weight %)** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.23 max | | **Manganese (Mn)** | 0.85 max | | **Phosphorus (P)** | 0.035 max | | **Sulfur (S)** | 0.035 max | | **Silicon (Si)** | 0.30 max | | **Copper (Cu)** | 0.20 min (when required) | | **Iron (Fe)** | Balance | **Key Composition Features:** - **Higher Carbon Content**: Maximum 0.23% for improved strength - **Enhanced Manganese**: Up to 0.85% for better hardenability and strength - **Controlled Impurities**: Standard phosphorus and sulfur limits - **Optional Copper**: For improved atmospheric corrosion resistance --- #### **4. Mechanical Properties** **Tensile Properties:** - **Tensile Strength**: 345 MPa (50,000 psi) min - **Yield Strength**: 290 MPa (42,000 psi) min - **Elongation in 50 mm (2 in)**: 18% min **Hardness Properties:** - **Brinell Hardness**: 105-160 HB typical - **Rockwell Hardness**: 60-85 HRB typical **Coating Properties:** - **Coating Weight**: 275 g/m² (0.90 oz/ft²) min - **Coating Adhesion**: Good - suitable for structural forming operations --- #### **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** | 51.5 W/m·K at 20°C | | **Coefficient of Thermal Expansion** | 11.6 × 10⁻⁶ /K (20-100°C) | | **Specific Heat Capacity** | 470 J/kg·K | --- #### **6. Product Applications** **Heavy-Duty Civil Engineering:** - **Large Diameter Culverts**: Highway and railway drainage systems - **Structural Plate Pipe-Arches**: Bridge replacements and underpasses - **Retaining Wall Systems**: Mechanically stabilized earth structures - **Soil Reinforcement**: Heavy-duty slope stabilization **Infrastructure Applications:** - **Stormwater Management Systems**: Detention and retention structures - **Bridge Construction**: Structural plate bridges and arches - **Mining Infrastructure**: Ventilation systems, access tunnels - **Flood Control Structures**: Levee protection and channel linings **Special Applications:** - **Deep Fill Applications**: Structures under significant soil load - **High Traffic Load Areas**: Road and railway crossings - **Marine Environments**: Coastal protection structures - **Industrial Sites**: Heavy-duty drainage systems --- #### **7. Manufacturing & Fabrication** **Forming Characteristics:** - **Good Formability**: Suitable for standard corrugation profiles - **Minimum Bend Radius**: 1.5 × thickness for 90° bends - **Coating Adhesion**: Maintains integrity during fabrication - **Corrugation Compatibility**: Excellent for structural plate forming **Welding Performance:** - **Good Weldability**: With proper procedures and equipment - **Recommended Processes**: GMAW with zinc-compatible wire - **Safety Precautions**: Adequate ventilation for zinc fume control - **Post-weld Protection**: Zinc-rich coatings for weld areas **Fabrication Considerations:** - **Bolting Compatibility**: Suitable for structural bolting systems - **Field Modification**: Can be cut and adjusted on site - **Connection Systems**: Compatible with standard structural connectors --- #### **8. Quality Assurance & Testing** **Standard Tests:** - Chemical analysis (heat analysis) - Tension test - Bend test - Coating weight verification - Coating adherence test **Enhanced Testing:** - Hardness testing - Dimensional verification - Surface quality inspection - Corrosion performance testing --- #### **9. Corrosion Performance** - **Atmospheric Corrosion**: Excellent protection from zinc coating - **Soil Environments**: Good performance in most soil conditions - **Water Immersion**: Suitable for freshwater applications - **Service Life Design**: Typically 25-75 years based on environment - **Zinc Sacrificial Protection**: Active corrosion protection mechanism --- #### **10. Available Product Forms** **Standard Dimensions:** - **Thickness Range**: 1.2 mm to 4.0 mm (0.047" to 0.157") - **Width Range**: 600 mm to 1500 mm (24" to 60") - **Length Range**: Coils or cut lengths as specified **Surface Conditions:** - Hot-dip galvanized coating - Minimum coating weight 275 g/m² - Standard or minimized spangle finish --- #### **11. Technical Specifications** **Coating Requirements:** - **Coating Weight**: 275 g/m² (0.90 oz/ft²) minimum - **Coating Uniformity**: Commercially acceptable coverage - **Adhesion**: Withstands fabrication without flaking **Dimensional Tolerances:** - **Thickness Tolerance**: ±0.12 mm - **Width Tolerance**: +6 mm, -0 mm - **Length Tolerance**: +10 mm, -0 mm - **Flatness**: Suitable for structural applications --- **Technical Notes:** - Grade B provides approximately 26% higher yield strength than Grade A - Suitable for applications requiring enhanced load-bearing capacity - Maintains good formability despite higher strength level - Zinc coating provides dual protection: barrier and sacrificial - Design should consider environmental conditions for lifespan estimation - Complies with AASHTO M218 for highway drainage applications *This information is for reference purposes. For complete technical requirements and design specifications, consult the latest ASTM A446 standard and applicable civil engineering design codes. Professional engineering review recommended for structural applications.* -:- For detailed product information, please contact sales. -: ASTM A446 Steel, grade B Specification Dimensions Size： Diameter 20-1000 mm Length <4252 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 A446 Steel, grade B Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A446 Steel Foil, grade B -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A446 Steel Foil, grade B -:- For detailed product information, please contact sales. -:

Packing of ASTM A446 Steel Foil/Strip, 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 Foil/Strip 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 723 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