ASTM A424 Steel Tube,Pipe, type II

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

ASTM A424 Steel, type II, composition B, drawing quality Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A424 Steel, Type II, Composition B (Drawing Quality)** --- #### **1. Product Overview** ASTM A424 Type II, Composition B, Drawing Quality is a **premium low-copper terne-coated steel sheet** specifically engineered for severe drawing and forming operations where copper contamination must be avoided. This high-formability material combines an ultra-low copper steel base with a lead-tin terne coating, providing exceptional ductility for deep drawing applications while ensuring compatibility with processes sensitive to copper presence. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A424 Type II, Comp B (DQ)** | | **UNS Number** | **K02604** | | **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, Low-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)** | 0.06 max | | **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 - **Strict Copper Control**: Maximum 0.06% to prevent contamination - **Aluminum Killing**: Ensures fine grain structure and non-aging properties - **Low Impurity Levels**: Controlled phosphorus and sulfur for maximum ductility - **Optimized Tin Content**: 15-25% for better coating performance --- #### **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 **Special Characteristics:** - **Copper-Free Advantage**: Eliminates contamination in sensitive processes - **Coating Adhesion**: Excellent - withstands severe deformation - **Formability**: Maintains deep drawing capabilities without copper --- #### **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** | 52.5 W/m·K | | **Coefficient of Thermal Expansion** | 11.7 × 10⁻⁶ /K | | **Electrical Conductivity** | 15-18% IACS | | **Grain Size** | ASTM 7-9 | --- #### **6. Product Applications** **Severe Forming Applications Requiring Copper Control:** - **Chemical Processing Equipment**: Deep-drawn components for copper-sensitive chemical reactions - **Pharmaceutical Manufacturing**: Equipment components where copper contamination must be avoided - **Food Processing Machinery**: Non-food contact parts requiring deep drawing - **Electronics Manufacturing**: Housings and enclosures for copper-sensitive processes - **Laboratory Equipment**: Precision-formed apparatus requiring copper-free construction **Specialized Industrial Applications:** - **Aerospace Components**: Parts for oxygen systems and other copper-sensitive applications - **Medical Device Manufacturing**: Non-implantable device components - **Semiconductor Equipment**: Components for cleanroom environments --- #### **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 - **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 --- #### **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 **Special Verification Tests:** - **Copper Content Analysis**: Maximum 0.06% verification - **Plastic Strain Ratio (r-value)**: 1.4 minimum - **Strain Hardening Exponent (n-value)**: 0.18 minimum - **Grain Size Analysis**: ASTM 7-9 verification --- #### **9. Corrosion Performance** - **Atmospheric Corrosion**: Good resistance for drawing quality applications - **Chemical Resistance**: Suitable for many non-corrosive environments - **Fuel Resistance**: Excellent performance with petroleum products - **Copper-Free Advantage**: Precludes copper-induced corrosion in specific chemical environments --- #### **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**: Maximum 0.06% certified - **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:** - Specifically designed for severe drawing operations in copper-sensitive environments - Maintains excellent deep drawability while ensuring copper content below 0.06% - Ideal for chemical, pharmaceutical, and electronic applications requiring copper control - Non-aging characteristics ensure consistent performance over time - Superior r-value and n-value maintained without copper addition - Compliance with industry-specific standards for copper-sensitive applications *This information is for reference purposes. For complete drawing quality specifications and copper content verification, consult the latest ASTM A424 standard and applicable industry specifications. Pre-production testing and copper content certification recommended for critical applications in sensitive environments.* -:- For detailed product information, please contact sales. -: ASTM A424 Steel, type II, composition B, drawing quality Specification Dimensions Size： Diameter 20-1000 mm Length <4250 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, drawing quality Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A424 Steel Tube, type II, composition B, 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 Tube 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 721 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