ASTM A424 Steel, type I, direct cover coat

ASTM A424 Steel, type I, direct cover coat Product Information -:- For detailed product information, please contact sales. -: ASTM A424 Steel, type I, direct cover coat Synonyms -:- For detailed product information, please contact sales. -:

ASTM A424 Steel, type I, direct cover coat Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A424 Steel, Type I (Direct Cover Coat)** --- #### **1. Product Overview** ASTM A424 Type I, Direct Cover Coat is a **terne-coated steel sheet** specifically designed for applications requiring excellent solderability, corrosion resistance, and formability. The terne coating consists of a lead-tin alloy applied to cold-rolled steel sheet, providing superior protection against corrosion while maintaining good fabrication characteristics. This material is particularly suitable for automotive fuel tanks, oil filters, and other applications where corrosion resistance and solderability are critical requirements. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A424 Type I** | | **UNS Number** | **K02602** | | **ISO International Standard** | **ISO 4999** | | **European Norm (EN)** | **EN 10205** | | **Japanese (JIS)** | **G3313** | | **German (DIN)** | **DIN 1616** | --- #### **3. Chemical Composition (Weight %)** **Base Steel Composition:** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.13 max | | **Manganese (Mn)** | 0.60 max | | **Phosphorus (P)** | 0.035 max | | **Sulfur (S)** | 0.035 max | | **Silicon (Si)** | 0.10 max | | **Iron (Fe)** | Balance | **Terne Coating Composition:** | Element | Composition (%) | |---------|-----------------| | **Lead (Pb)** | 75-90% | | **Tin (Sn)** | 10-25% | | **Other Elements** | 0.50 max | **Key Composition Features:** - **Low Carbon Steel Base**: Ensures excellent formability - **Lead-Tin Alloy Coating**: Provides corrosion protection and solderability - **Controlled Coating Thickness**: Typically 0.6-1.5 μm per side - **Coating Weight**: 30-120 g/m² total both sides --- #### **4. Mechanical Properties** **Base Metal Properties:** - **Tensile Strength**: 310-450 MPa (45,000-65,000 psi) - **Yield Strength**: 205 MPa (30,000 psi) min - **Elongation in 50 mm (2 in)**: 22% min - **Hardness**: 55-75 HRB **Coating Properties:** - **Coating Adhesion**: Excellent - withstands forming without flaking - **Solderability**: Excellent with all common solder alloys - **Coating Uniformity**: Consistent coverage across surface --- #### **5. Physical Properties** | Property | Value | |----------|-------| | **Density (Base Steel)** | 7.85 g/cm³ | | **Density (Terne Coating)** | 9.50-10.50 g/cm³ | | **Melting Point (Coating)** | 183-327°C (361-621°F) | | **Thermal Conductivity** | 48.0 W/m·K | | **Coefficient of Thermal Expansion** | 12.0 × 10⁻⁶ /K | | **Electrical Conductivity** | 12-15% IACS | | **Magnetic Properties** | Ferromagnetic | --- #### **6. Product Applications** **Automotive Industry:** - Fuel tanks and fuel system components - Oil filters and filter housings - Air cleaner assemblies - Brake system components - Transmission parts **Industrial Applications:** - Radiator components - Heat exchanger parts - Electrical enclosures - Chemical containers - General corrosion-resistant applications **Consumer Products:** - Gasoline containers - Oil cans and lubricant containers - Decorative hardware - Specialty packaging --- #### **7. Manufacturing & Fabrication** **Forming Characteristics:** - **Excellent Formability**: Suitable for deep drawing and stamping - **Coating Adhesion**: Maintains integrity during severe forming - **Minimum Bend Radius**: 1.0 × thickness - **Tooling Requirements**: Standard tool steel suitable **Joining Methods:** - **Excellent Solderability**: All common solder types - **Soldering Temperature**: 200-300°C (392-572°F) - **Welding**: Resistance welding recommended - **Adhesive Bonding**: Good with proper surface preparation **Surface Treatment:** - **Painting**: Good adhesion with proper pretreatment - **Chemical Treatment**: Phosphating recommended for paint adhesion - **Storage**: Dry conditions to prevent white rust --- #### **8. Quality Assurance & Testing** **Standard Tests:** - Coating weight measurement - Coating composition analysis - Adhesion testing (bend test) - Solderability testing - Surface quality inspection **Performance Tests:** - Corrosion resistance testing - Formability testing - Adhesion after forming - Chemical resistance evaluation --- #### **9. Corrosion Performance** - **Atmospheric Corrosion**: Excellent resistance - **Fuel Resistance**: Superior performance with gasoline and oil - **Water Resistance**: Good with proper drainage - **Chemical Resistance**: Resistant to many organic compounds - **Protection Mechanism**: Sacrificial coating protection --- #### **10. Available Product Forms** **Standard Dimensions:** - **Thickness Range**: 0.40 mm to 2.00 mm (0.016" to 0.079") - **Width Range**: 600 mm to 1500 mm (24" to 60") - **Length Range**: 1000 mm to 4000 mm (40" to 160") **Surface Conditions:** - Bright terne coating - Matte finish available - Oiled for protection - Custom surface treatments --- #### **11. Technical Specifications** **Coating Requirements:** - **Coating Weight**: 30-120 g/m² total both sides - **Coating Thickness**: 0.6-1.5 μm per side - **Coating Uniformity**: Minimum 90% coverage - **Surface Quality**: Free from uncoated areas **Dimensional Tolerances:** - **Thickness Tolerance**: ±0.05 mm - **Width Tolerance**: +3 mm, -0 mm - **Length Tolerance**: +6 mm, -0 mm - **Flatness**: 10 mm/m maximum --- **Technical Notes:** - Direct cover coat provides immediate corrosion protection - Excellent for applications requiring soldered joints - Suitable for contact with petroleum products - Proper ventilation required during soldering operations - Storage in dry conditions recommended to prevent corrosion *This information is for reference purposes. For complete requirements and current specifications, consult the latest ASTM A424 standard and applicable industry specifications. Always verify material properties with certified mill test reports for critical applications.* -:- For detailed product information, please contact sales. -: ASTM A424 Steel, type I, direct cover coat Specification Dimensions Size： Diameter 20-1000 mm Length <4244 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 I, direct cover coat Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A424 Steel, type I, direct cover coat -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A424 Steel, type I, direct cover coat -:- For detailed product information, please contact sales. -:

Packing of ASTM A424 Steel, type I, direct cover coat -:- 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 715 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