ASTM A230 Carbon Steel Tube,Pipe

ASTM A230 Carbon Steel Tube Wire Product Information -:- For detailed product information, please contact sales. -: ASTM A230 Carbon Steel Tube Wire Synonyms -:- For detailed product information, please contact sales. -:

ASTM A230 Carbon Steel Wire Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A230 Carbon Steel Wire** **ASTM A230** is a specification for oil-tempered carbon steel valve spring quality wire, specifically designed for high-performance mechanical springs, particularly valve springs in internal combustion engines. This standard covers steel wire that is oil-tempered to achieve superior fatigue resistance and consistent mechanical properties for demanding dynamic applications. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A230/A230M** - "Standard Specification for Steel Wire, Oil-Tempered Carbon Valve Spring Quality" **Special Characteristics:** - Valve spring quality with stringent quality requirements - Specifically designed for high-fatigue applications - Controlled surface quality and decarburization **International Equivalents:** - **EN 10270-2**: VD (Valve Spring Quality) grade - **JIS G 3561**: SWOSC-V - **GB/T 4359**: Valve spring quality wire - **ISO 8458-3**: Valve spring type --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A230: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.60-0.75 | | Manganese (Mn) | 0.50-0.90 | | Phosphorus (P) | 0.020 | | Sulfur (S) | 0.020 | | Silicon (Si) | 0.15-0.35 | | Chromium (Cr) | 0.50 (max, when specified) | **Key Composition Features:** - **Higher Carbon Range**: 0.60-0.75% for optimal fatigue strength - **Stringent Impurity Control**: Phosphorus and sulfur limited to 0.020% - **Optional Chromium**: Up to 0.50% for enhanced hardenability - **Balanced Silicon**: 0.15-0.35% for strength and toughness balance --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (Typical for valve spring applications):** | Wire Diameter (mm) | Tensile Strength (MPa) | Torsion Tests (min. twists) | Fatigue Life (cycles) | |---|---|---|---| | 1.0-2.0 | 1600-1900 | 20-25 | >10⁷ | | 2.1-3.0 | 1550-1850 | 18-22 | >10⁷ | | 3.1-4.0 | 1500-1800 | 16-20 | >10⁷ | | 4.1-5.0 | 1450-1750 | 14-18 | >10⁷ | **Enhanced Physical Properties:** - **Density**: 7.85 g/cm³ - **Modulus of Elasticity**: 200 GPa - **Shear Modulus**: 77 GPa - **Fatigue Limit**: High endurance under cyclic loading - **Thermal Resistance**: Stable up to 200°C --- #### **4. Product Applications** **Valve Spring Applications:** - Automotive engine valve springs - Motorcycle engine valve springs - Marine engine valve springs - Small engine valve springs **High-Performance Spring Applications:** - Fuel injection pump springs - High-speed precision springs - Dynamic loading springs - Critical mechanism springs **Automotive and Transportation:** - Engine valve train components - Transmission control springs - High-performance suspension springs - Racing engine components **Specialized Applications:** - Compressor valve springs - Pump valve springs - High-cycle mechanical springs - Precision instrument springs --- #### **5. Fabrication Characteristics** **Superior Forming Performance:** - **Excellent Cold Formability**: Precision coiling capability - **Consistent Springback**: Predictable forming characteristics - **Surface Sensitivity**: Requires careful handling - **Winding Precision**: Suitable for high-speed automatic coiling **Advanced Heat Treatment:** - **Oil Tempering Process**: Optimized for valve spring performance - **Microstructural Control**: Fine, uniform tempered martensite - **Stress Relief**: Essential for high-fatigue applications - **Temperature Stability**: Maintains properties under engine operating conditions **Stringent Surface Requirements:** - **Superior Surface Finish**: Minimal surface defects - **Decarburization Control**: Strict limits on total and partial decarburization - **Surface Integrity**: Critical for fatigue performance - **Cleaning Requirements**: Must be free of harmful contaminants **Rigorous Quality Assurance:** - **Comprehensive Testing**: Tensile, torsion, and fatigue testing - **Surface Quality Verification**: Extensive surface inspection - **Dimensional Precision**: Tight diameter and ovality tolerances - **Microstructural Examination**: Grain size and structure evaluation - **Non-Destructive Testing**: Eddy current or other NDT methods --- ### **Technical Summary** ASTM A230 carbon steel wire represents the premium grade for valve spring and high-fatigue applications, offering exceptional performance characteristics specifically engineered for demanding dynamic loading conditions. The oil-tempering process combined with stringent quality controls ensures superior fatigue resistance and consistent mechanical properties essential for valve spring operation in internal combustion engines. The higher carbon content (0.60-0.75%) provides the necessary strength and fatigue resistance, while the tight chemical controls and specialized manufacturing processes guarantee the reliability required for critical automotive and mechanical applications. The wire's exceptional surface quality and controlled decarburization are crucial for achieving the high fatigue life demanded by valve spring applications. ASTM A230 wire is characterized by its predictable behavior during spring manufacturing, consistent mechanical properties, and excellent performance under high-cycle fatigue conditions. The specification's rigorous quality assurance requirements, including extensive testing and inspection protocols, ensure that the wire meets the highest standards for valve spring applications where failure is not an option. This specialized wire has established itself as the industry standard for valve spring applications, providing the optimal combination of strength, fatigue resistance, and manufacturing consistency required for reliable performance in the most demanding mechanical spring applications. -:- For detailed product information, please contact sales. -: ASTM A230 Carbon Steel Wire Specification Dimensions Size： Diameter 20-1000 mm Length <4349 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 A230 Carbon Steel Wire Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A230 Carbon Steel Tube Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A230 Carbon Steel Tube Wire -:- For detailed product information, please contact sales. -:

Packing of ASTM A230 Carbon Steel Tube Wire -:- 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 820 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