ASTM A229 Oil-tempered Steel Seamless tube, Class I

ASTM A229 Oil-tempered Steel Seamless tube Wire, Class I Product Information -:- For detailed product information, please contact sales. -: ASTM A229 Oil-tempered Steel Seamless tube Wire, Class I Synonyms -:- For detailed product information, please contact sales. -:

ASTM A229 Oil-tempered Steel Wire, Class I Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A229 Oil-tempered Steel Wire, Class I** **ASTM A229 Class I** is an oil-tempered carbon steel wire specifically designed for mechanical spring applications requiring high strength and fatigue resistance. This class represents the standard grade within the A229 specification, offering excellent combination of properties for general-purpose spring manufacturing through oil quenching and tempering process. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A229/A229M** - "Standard Specification for Steel Wire, Oil-Tempered for Mechanical Springs" **Classification:** - **Class I** - Standard oil-tempered steel spring wire - **Class II** - Special quality with closer dimensional tolerances **International Equivalents:** - **EN 10270-2**: FD (Oil Hardened and Tempered) grade - **JIS G 3560**: SWO-A - **GB/T 4358**: Class I - **ISO 8458-3**: Type A --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A229 Class I: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.55-0.65 | | Manganese (Mn) | 0.50-0.90 | | Phosphorus (P) | 0.025 | | Sulfur (S) | 0.025 | | Silicon (Si) | 0.15-0.35 | **Key Composition Features:** - **Medium Carbon Content**: 0.55-0.65% balanced for strength and toughness - **Manganese Range**: 0.50-0.90% for hardenability control - **Silicon Content**: 0.15-0.35% for solid solution strengthening - **Low Impurities**: Controlled phosphorus and sulfur for improved ductility --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (Typical for various diameters):** | Wire Diameter (mm) | Tensile Strength (MPa) | Torsion Tests (min. twists) | |---|---|---| | 0.50-1.00 | 1700-2000 | 18-22 | | 1.01-2.00 | 1650-1950 | 16-20 | | 2.01-3.00 | 1600-1900 | 14-18 | | 3.01-4.00 | 1550-1850 | 12-16 | | 4.01-5.00 | 1500-1800 | 10-14 | **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Shear Modulus**: 77 GPa (11,200 ksi) - **Fatigue Strength**: Excellent cyclic loading performance - **Thermal Conductivity**: 48.5 W/m·K --- #### **4. Product Applications** **Spring Manufacturing:** - Automotive suspension springs - Heavy-duty compression springs - Extension springs for industrial equipment - Torsion springs for machinery **Industrial Applications:** - Valve springs for engines - Clutch springs - Heavy machinery springs - Agricultural equipment springs **Transportation Industry:** - Truck suspension components - Railway vehicle springs - Off-road vehicle suspensions - Transportation equipment springs **Special Applications:** - Industrial door springs - Lift mechanism springs - Heavy-duty tool springs - Construction equipment springs --- #### **5. Fabrication Characteristics** **Forming Performance:** - **Good Cold Formability**: Suitable for cold coiling operations - **Consistent Springback**: Predictable behavior after forming - **Winding Characteristics**: Excellent for automatic spring coiling - **Surface Condition**: Clean surface suitable for most applications **Heat Treatment Response:** - **Oil Tempering**: Provides uniform microstructure - **No Additional Hardening**: Ready-to-use condition - **Stress Relieving**: Optional for critical applications - **Temperature Resistance**: Suitable for moderate temperature applications **Surface Quality:** - **Standard Finish**: Clean, scale-free surface - **Decarburization Control**: Minimal surface decarburization - **Coating Compatibility**: Good for plating and painting **Quality Assurance:** - **Tensile Testing**: Required for each lot - **Torsion Testing**: Mandatory quality control - **Dimensional Checks**: Standard commercial tolerances - **Surface Inspection**: Visual examination for defects --- ### **Technical Summary** ASTM A229 Class I oil-tempered steel wire represents a reliable and cost-effective solution for mechanical spring applications requiring good strength and fatigue resistance. The oil quenching and tempering process provides a fine, uniform microstructure that ensures consistent mechanical properties and excellent performance in spring applications. The medium carbon chemistry (0.55-0.65%) offers an optimal balance between strength and toughness, making this class suitable for a wide range of general-purpose spring applications. The tempering process after oil quenching ensures good ductility and reduces internal stresses, resulting in improved fatigue life compared to cold-drawn wires. This class is particularly valuable for applications where springs are subjected to dynamic loading conditions and require good resistance to fatigue failure. The consistent properties and reliable performance make ASTM A229 Class I a popular choice for automotive, industrial, and heavy equipment spring applications where durability and cost-effectiveness are important considerations. The wire's good formability and predictable behavior during spring manufacturing contribute to efficient production processes, while the standardized mechanical properties ensure consistent performance in finished spring products across various applications and industries. -:- For detailed product information, please contact sales. -: ASTM A229 Oil-tempered Steel Wire, Class I Specification Dimensions Size： Diameter 20-1000 mm Length <4347 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 A229 Oil-tempered Steel Wire, Class I Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A229 Oil-tempered Steel Seamless tube Wire, Class I -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A229 Oil-tempered Steel Seamless tube Wire, Class I -:- For detailed product information, please contact sales. -:

Packing of ASTM A229 Oil-tempered Steel Seamless tube Wire, Class I -:- 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 Seamless 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 818 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