ASTM A109 Carbon Steel Tube,Pipe, Tempers 4 or 5

ASTM A109 Carbon Steel Tube, Tempers 4 or 5, Composition Spec Product Information -:- For detailed product information, please contact sales. -: ASTM A109 Carbon Steel Tube, Tempers 4 or 5, Composition Spec Synonyms -:- For detailed product information, please contact sales. -:

ASTM A109 Carbon Steel, Tempers 4 or 5, Composition Spec Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A109 Carbon Steel, Tempers 4 or 5, Composition Spec** **ASTM A109** covers cold-rolled carbon steel strip in **Tempers 4 or 5** with specified chemical compositions. These tempers represent higher strength levels achieved through controlled chemical composition and cold reduction, designed for applications requiring enhanced mechanical properties while maintaining some degree of formability. The composition specification ensures consistent performance through precise chemical control. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A109/A109M** - "Standard Specification for Steel, Strip, Carbon, Cold-Rolled" **Temper Classification:** - **Temper 4** - Hard temper, for limited forming applications - **Temper 5** - Spring temper, for high-strength applications **International Equivalents:** - **EN 10139**: DC05, DC06 - **JIS G3141**: SPCE, SPCEN - **GB/T 5213**: DC05, DC06 - **ISO 3574**: CR4, CR5 --- #### **2. Chemical Composition Specifications** **Standard Composition Ranges (Maximum %):** | Element | Temper 4 | Temper 5 | |---|---|---| | Carbon (C) | 0.15 max | 0.15 max | | Manganese (Mn) | 0.60 max | 0.60 max | | Phosphorus (P) | 0.030 | 0.030 | | Sulfur (S) | 0.030 | 0.030 | | Silicon (Si) | 0.10 | 0.10 | **Typical Composition Ranges:** - **Temper 4**: C 0.08-0.12%, Mn 0.30-0.50% - **Temper 5**: C 0.10-0.15%, Mn 0.40-0.60% **Key Composition Features:** - **Controlled Carbon**: Optimized for strength and limited formability - **Manganese Enhancement**: Provides solid solution strengthening - **Standard Impurity Levels**: Maintains consistent quality - **Simple Chemistry**: Focus on carbon and manganese for property control --- #### **3. Physical & Mechanical Properties** **Typical Mechanical Properties:** | Property | Temper 4 | Temper 5 | |---|---|---| | **Tensile Strength (MPa)** | 480-620 | 550-690 | | **Yield Strength (MPa)** | 400-520 | 480-600 | | **Elongation in 2" (%)** | 5-12 | 3-8 | | **Hardness (HRB)** | 75-90 | 85-100 | **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Poisson's Ratio**: 0.29 - **Thermal Conductivity**: 51.5 W/m·K - **Coefficient of Thermal Expansion**: 11.6 × 10⁻⁶/°C - **Electrical Resistivity**: 0.18 μΩ·m --- #### **4. Product Applications** **Temper 4 Applications:** - Structural brackets and supports - Automotive seat frames - Electrical motor laminations - Industrial hardware components - Machinery guards and covers **Temper 5 Applications:** - Spring clips and retainers - Lock washers and spring washers - Electrical contact springs - Snap rings and retaining rings - High-strength fasteners **Industry-Specific Applications:** - **Automotive**: Seat belt components, brake springs, clutch parts - **Electronics**: Connector springs, relay components, shielding - **Industrial**: Machine parts, tool components, fixtures - **Consumer**: Lock mechanisms, appliance springs, hardware --- #### **5. Fabrication Characteristics** **Forming Performance:** - **Temper 4**: Limited forming capability, suitable for simple bends - **Temper 5**: Very limited forming, primarily for flat applications - **Minimum Bend Radius**: 3-4t for Temper 4, 4-5t for Temper 5 - **Springback**: Significant and must be compensated in tooling **Welding Characteristics:** - **Fair Weldability**: Requires careful parameter control - **Recommended Processes**: Resistance welding, laser welding - **Preheat**: Generally not required for thin sections - **Filler Metals**: Matching strength electrodes recommended **Machining & Cutting:** - **Good Machinability**: Better than softer tempers - **Chip Formation**: Good, with proper tool geometry - **Cutting Methods**: Laser, plasma, and stamping suitable - **Tool Life**: Good with appropriate cutting parameters **Heat Treatment Response:** - **Stress Relieving**: Beneficial for formed parts - **Annealing**: Can be used to soften for additional forming - **Temper Stability**: Good resistance to property changes --- ### **Technical Summary** ASTM A109 carbon steel strip in Tempers 4 and 5 with specified chemical compositions provides manufacturers with high-strength materials for applications requiring enhanced mechanical properties. These tempers represent the higher strength range of cold-rolled carbon steel strip, achieved through controlled chemical composition and precise cold reduction processes. Temper 4 offers a balance of strength and limited formability, making it suitable for structural components and supports that require some fabrication capability. Temper 5 provides the highest strength level in the A109 specification, ideal for spring applications and high-stress components where minimal forming is required. The composition specification ensures consistent mechanical properties through precise chemical control, with carbon and manganese being the primary elements determining the final properties. These tempers are particularly valuable in applications where weight reduction, space constraints, or high strength-to-weight ratios are important design considerations. The excellent surface finish, consistent mechanical properties, and reliable performance make Tempers 4 and 5 ideal for precision components in automotive, electronics, and industrial applications where high strength and dimensional stability are critical requirements. -:- For detailed product information, please contact sales. -: ASTM A109 Carbon Steel, Tempers 4 or 5, Composition Spec Specification Dimensions Size： Diameter 20-1000 mm Length <4324 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 A109 Carbon Steel, Tempers 4 or 5, Composition Spec Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A109 Carbon Steel Tube, Tempers 4 or 5, Composition Spec -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A109 Carbon Steel Tube, Tempers 4 or 5, Composition Spec -:- For detailed product information, please contact sales. -:

Packing of ASTM A109 Carbon Steel Tube, Tempers 4 or 5, Composition Spec -:- 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 795 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