ASTM A424 Steel, type II, composition A, drawing quality

ASTM A424 Steel, type II, composition A, drawing quality Product Information -:- For detailed product information, please contact sales. -: ASTM A424 Steel, type II, composition A, drawing quality Synonyms -:- For detailed product information, please contact sales. -:

ASTM A424 Steel, type II, composition A, drawing quality Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A424 Steel, Type II, Composition A (Drawing Quality)** --- #### **1. Product Overview** ASTM A424 Type II, Composition A, Drawing Quality is a **premium copper-bearing terne-coated steel sheet** engineered for severe drawing and forming operations where enhanced atmospheric corrosion resistance is required. This high-formability material combines a copper-alloyed steel base with a lead-tin terne coating, providing exceptional ductility for deep drawing applications while offering superior corrosion protection compared to standard drawing quality terne sheets. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A424 Type II, Comp A (DQ)** | | **UNS Number** | **K02603** | | **ISO International Standard** | **ISO 4999 (DQ/DDQ)** | | **European Norm (EN)** | **EN 10205 (DD/EDDQ)** | | **Japanese (JIS)** | **G3313 (SPCE)** | | **German (DIN)** | **DIN 1624 (DC04/DC05)** | --- #### **3. Chemical Composition (Weight %)** **Base Steel Composition (Drawing Quality with Copper):** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.08 max | | **Manganese (Mn)** | 0.40 max | | **Phosphorus (P)** | 0.020 max | | **Sulfur (S)** | 0.025 max | | **Silicon (Si)** | 0.03 max | | **Copper (Cu)** | 0.20 min | | **Aluminum (Al)** | 0.02-0.07 | | **Iron (Fe)** | Balance | **Terne Coating Composition:** | Element | Composition (%) | |---------|-----------------| | **Lead (Pb)** | 75-85% | | **Tin (Sn)** | 15-25% | | **Other Elements** | 0.30 max | **Key Composition Features:** - **Ultra-Low Carbon**: Maximum 0.08% for superior deep drawability - **Copper Addition**: Minimum 0.20% for enhanced atmospheric corrosion resistance - **Aluminum Killing**: Ensures fine grain structure and non-aging properties - **Strict Impurity Control**: Low phosphorus and sulfur for maximum ductility - **Optimized Tin Content**: 15-25% for better coating performance in severe forming --- #### **4. Mechanical Properties** **Base Metal Properties (Drawing Quality):** - **Tensile Strength**: 270-350 MPa (39,000-51,000 psi) - **Yield Strength**: 140-210 MPa (20,000-30,000 psi) - **Elongation in 50 mm (2 in)**: 32% min - **Plastic Strain Ratio (r-value)**: 1.4 min - **Strain Hardening Exponent (n-value)**: 0.18 min - **Hardness**: 45-60 HRB **Enhanced Properties:** - **Corrosion Resistance**: Superior to standard DQ terne sheets - **Coating Adhesion**: Excellent - withstands severe deformation - **Formability**: Maintains deep drawing capabilities with copper addition --- #### **5. Physical Properties** | Property | Value | |----------|-------| | **Density (Base Steel)** | 7.85 g/cm³ | | **Density (Terne Coating)** | 9.50-10.20 g/cm³ | | **Melting Point (Coating)** | 183-327°C (361-621°F) | | **Thermal Conductivity** | 48.5 W/m·K | | **Coefficient of Thermal Expansion** | 11.8 × 10⁻⁶ /K | | **Electrical Conductivity** | 13-16% IACS | | **Grain Size** | ASTM 7-9 | --- #### **6. Product Applications** **Severe Forming Applications Requiring Enhanced Corrosion Resistance:** - **Automotive**: Complex fuel tank components, intricate brake system parts, underbody components - **Outdoor Equipment**: Deep-drawn housings for outdoor electrical equipment, weather-resistant enclosures - **HVAC**: Complex formed components for outdoor ventilation systems - **Industrial**: Deep-drawn containers for corrosive environments, precision instrument housings **Special Applications:** - Components requiring both severe forming and outdoor durability - Parts exposed to atmospheric corrosion during service life - Applications where painting may not be practical --- #### **7. Manufacturing & Fabrication** **Forming Characteristics (Drawing Quality):** - **Excellent Deep Drawability**: Suitable for most severe drawing operations - **Minimum Bend Radius**: 0.3 × thickness - **Coating Adhesion**: Maintains integrity in severe deformation with copper base - **Springback**: Minimal and predictable **Tooling & Lubrication:** - **Tooling Requirements**: Premium tool steels recommended - **Lubrication**: Compatible with all standard drawing compounds - **Die Clearances**: Standard deep drawing practice applicable **Joining Methods:** - **Excellent Solderability**: Superior wetting characteristics - **Resistance Welding**: Excellent performance with proper parameters - **Seam Welding**: Suitable for leak-tight joints in corrosive environments --- #### **8. Quality Assurance & Testing** **Drawing Quality Tests:** - **Ericsson Cupping Test**: 9.5 mm min - **Olsen Ductility Test**: 10.0 mm min - **Rockwell Hardness Test**: Verified for consistency - **Coating Adhesion Test**: Severe deformation testing **Enhanced Testing:** - Copper content verification - Plastic strain ratio (r-value) determination - Strain hardening exponent (n-value) measurement - Corrosion resistance testing --- #### **9. Corrosion Performance** - **Atmospheric Corrosion**: Approximately 1.5-2× better than standard DQ terne sheets - **Salt Spray Resistance**: Enhanced performance in marine environments - **Fuel Resistance**: Superior performance with automotive fuels - **Long-term Durability**: Maintains corrosion resistance after severe forming - **Weathering Characteristics**: Develops protective patina over time --- #### **10. Available Product Forms** **Premium Dimensions:** - **Thickness Range**: 0.50 mm to 1.50 mm (0.020" to 0.060") - **Width Range**: 600 mm to 1300 mm (24" to 51") - **Length Range**: Coils or precision cut lengths **Surface Conditions:** - Premium terne coating finish - Consistent coating appearance - Superior surface quality for critical applications --- #### **11. Technical Specifications** **Premium Coating Requirements:** - **Coating Weight**: 40-100 g/m² total both sides - **Coating Uniformity**: Minimum 95% coverage - **Copper Content**: Minimum 0.20% verified - **Surface Quality**: Superior finish free from defects **Dimensional Tolerances (Drawing Quality):** - **Thickness Tolerance**: ±0.04 mm - **Width Tolerance**: +2 mm, -0 mm - **Length Tolerance**: +3 mm, -0 mm - **Flatness**: 5 mm/m maximum --- **Technical Notes:** - Copper addition provides enhanced corrosion resistance without compromising formability - Specifically designed for severe drawing operations in corrosive environments - Non-aging characteristics ensure consistent performance over time - Superior r-value and n-value maintained despite copper addition - Ideal for automotive and industrial applications requiring both formability and durability - Compliance with automotive industry standards for corrosion-resistant components *This information is for reference purposes. For complete drawing quality specifications and corrosion performance data, consult the latest ASTM A424 standard and applicable automotive/industrial specifications. Pre-production testing recommended for critical deep drawing applications in corrosive environments.* -:- For detailed product information, please contact sales. -: ASTM A424 Steel, type II, composition A, drawing quality Specification Dimensions Size： Diameter 20-1000 mm Length <4248 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 A424 Steel, type II, composition A, drawing quality Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A424 Steel, type II, composition A, drawing quality -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A424 Steel, type II, composition A, drawing quality -:- For detailed product information, please contact sales. -:

Packing of ASTM A424 Steel, type II, composition A, drawing quality -:- 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 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 719 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