ASTM A424 Steel, type II, composition B, commercial quality

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

ASTM A424 Steel, type II, composition B, commercial quality Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A424 Steel, Type II, Composition B (Commercial Quality)** --- #### **1. Product Overview** ASTM A424 Type II, Composition B, Commercial Quality is a **terne-coated steel sheet** manufactured from a **low-copper or copper-free steel base** specifically designed for applications where copper contamination must be avoided. This material provides the excellent solderability and formability of standard terne coating while ensuring compatibility with processes and environments where copper presence could cause issues, such as in certain chemical processing or food-related applications. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A424 Type II, Comp B (CQ)** | | **UNS Number** | **K02604** | | **ISO International Standard** | **ISO 4999** | | **European Norm (EN)** | **EN 10205** | | **Japanese (JIS)** | **G3313** | | **Chinese GB** | **GB/T 11253** | --- #### **3. Chemical Composition (Weight %)** **Base Steel Composition (Low-Copper):** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.15 max | | **Manganese (Mn)** | 0.60 max | | **Phosphorus (P)** | 0.035 max | | **Sulfur (S)** | 0.035 max | | **Silicon (Si)** | 0.10 max | | **Copper (Cu)** | 0.06 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 Copper Content**: Maximum 0.06% to prevent copper-related issues - **Commercial Quality Base**: Balanced chemistry for good formability - **Standard Terne Coating**: Lead-tin alloy for solderability and corrosion protection - **Coating Weight**: 30-110 g/m² total both sides --- #### **4. Mechanical Properties** **Base Metal Properties (Commercial Quality):** - **Tensile Strength**: 290-450 MPa (42,000-65,000 psi) - **Yield Strength**: 170 MPa (25,000 psi) min - **Elongation in 50 mm (2 in)**: 20% min - **Hardness**: 50-75 HRB **Special Characteristics:** - **Copper-Free Advantage**: Eliminates copper contamination concerns - **Coating Adhesion**: Good for commercial forming operations - **Solderability**: Excellent with standard solder alloys --- #### **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** | 52.0 W/m·K | | **Coefficient of Thermal Expansion** | 11.7 × 10⁻⁶ /K | | **Electrical Conductivity** | 14-17% IACS | | **Magnetic Properties** | Ferromagnetic | --- #### **6. Product Applications** **Copper-Sensitive Applications:** - **Chemical Processing Equipment**: Components for copper-sensitive chemical reactions - **Food Processing**: Non-food contact equipment where copper migration is a concern - **Electronics Manufacturing**: Components for processes sensitive to copper contamination - **Laboratory Equipment**: Apparatus requiring copper-free construction **General Industrial Applications:** - **HVAC Components**: Ductwork and fittings - **General Fabrication**: Brackets, enclosures, and covers - **Containers**: Storage cans and industrial containers - **Electrical Enclosures**: Non-critical applications --- #### **7. Manufacturing & Fabrication** **Forming Characteristics:** - **Good Formability**: Suitable for bending and moderate forming - **Coating Adhesion**: Maintains integrity in commercial forming operations - **Minimum Bend Radius**: 1.5 × thickness - **Tooling**: Standard commercial tooling suitable **Joining Methods:** - **Excellent Solderability**: With common solder alloys - **Soldering Temperature**: 200-300°C (392-572°F) - **Resistance Welding**: Good performance with proper parameters - **Mechanical Fastening**: Suitable for commercial applications **Special Considerations:** - **Copper Contamination Control**: Ideal for processes sensitive to copper - **Surface Treatment**: Good paint adhesion with proper preparation - **Storage**: Dry conditions recommended --- #### **8. Quality Assurance & Testing** **Commercial Quality Tests:** - Chemical analysis (including copper verification ≤0.06%) - Coating weight measurement - Coating adhesion testing (bend test) - Solderability testing - Visual surface inspection **Special Verification:** - Copper content certification - Contamination control verification - Material traceability --- #### **9. Corrosion Performance** - **Atmospheric Corrosion**: Good resistance for commercial applications - **Chemical Resistance**: Suitable for many non-corrosive environments - **Fuel Resistance**: Good performance with petroleum products - **Copper-Free Advantage**: Precludes copper-induced corrosion in specific environments --- #### **10. Available Product Forms** **Commercial Dimensions:** - **Thickness Range**: 0.45 mm to 2.00 mm (0.018" to 0.079") - **Width Range**: 600 mm to 1500 mm (24" to 60") - **Length Range**: Coils or cut lengths as required **Surface Conditions:** - Standard terne coating finish - Oiled for storage and handling - Commercial surface quality --- #### **11. Technical Specifications** **Coating Requirements:** - **Coating Weight**: 30-110 g/m² total both sides - **Coating Uniformity**: Commercially acceptable coverage - **Copper Content**: Maximum 0.06% in base metal **Dimensional Tolerances (Commercial):** - **Thickness Tolerance**: ±0.08 mm - **Width Tolerance**: +5 mm, -0 mm - **Length Tolerance**: +10 mm, -0 mm - **Flatness**: Commercially straight --- **Technical Notes:** - Specifically designed for applications where copper content must be minimized - Maintains excellent solderability while eliminating copper contamination risks - Suitable for processes sensitive to copper, such as certain chemical reactions - Commercial quality provides cost-effective solution for non-critical applications - Proper handling and storage recommended to maintain coating integrity - Compliance with industry-specific regulations regarding material composition *This information is for reference purposes. For complete commercial quality requirements and copper content specifications, consult the latest ASTM A424 standard and applicable industry specifications. Material certification for copper content recommended for sensitive applications.* -:- For detailed product information, please contact sales. -: ASTM A424 Steel, type II, composition B, commercial quality Specification Dimensions Size： Diameter 20-1000 mm Length <4249 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 B, commercial quality Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A424 Steel, type II, composition B, commercial 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 720 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