ASTM A227 Steel Rod/Bar, Class I

ASTM A227 Steel Rod Wire, Class I Product Information -:- For detailed product information, please contact sales. -: ASTM A227 Steel Rod Wire, Class I Synonyms -:- For detailed product information, please contact sales. -:

ASTM A227 Steel Wire, Class I Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A227 Class I Steel Wire** **ASTM A227 Class I** is a cold-drawn carbon steel wire specifically designed for mechanical spring applications. This class represents the standard grade within the A227 specification, offering a balanced combination of strength and ductility for general-purpose spring manufacturing and other mechanical applications requiring reliable performance. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A227/A227M** - "Standard Specification for Steel Wire, Cold-Drawn for Mechanical Springs" **Classification:** - **Class I** - Standard hard-drawn steel spring wire - **Class II** - Special quality with closer dimensional tolerances **International Equivalents:** - **EN 10270-1**: SH (Spring Hardened) grade - **JIS G 3521**: SWP-A - **GB/T 4357**: Grade D - **ISO 8458-2**: Class A --- #### **2. Chemical Composition** The typical chemical composition requirements for ASTM A227 Class I: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.85-0.95 | | Manganese (Mn) | 0.30-0.60 | | Phosphorus (P) | 0.025 | | Sulfur (S) | 0.025 | | Silicon (Si) | 0.10-0.30 | **Key Composition Features:** - **High Carbon Content**: Primary contributor to strength and spring properties - **Controlled Manganese**: Enhances hardenability and strength - **Low Impurity Levels**: Ensures consistent mechanical properties - **Silicon Content**: Provides solid solution strengthening --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (Typical for various diameters):** | Wire Diameter (mm) | Tensile Strength (MPa) | Torsion Tests (min. twists) | |---|---|---| | 0.50-1.00 | 1850-2150 | 20-25 | | 1.01-2.00 | 1750-2050 | 18-22 | | 2.01-3.00 | 1650-1950 | 16-20 | | 3.01-4.00 | 1550-1850 | 14-18 | **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) - **Thermal Conductivity**: 49.5 W/m·K - **Coefficient of Thermal Expansion**: 11.5 × 10⁻⁶/°C --- #### **4. Product Applications** **Spring Manufacturing:** - Compression springs - Extension springs - Torsion springs - Volute springs **Industrial Applications:** - Mechanical seals - Clutch springs - Valve springs - Electrical contacts **Consumer Products:** - Furniture springs - Appliance components - Office equipment springs - Hardware springs **Automotive Applications:** - Suspension components - Brake system springs - Transmission components - Engine valve springs --- #### **5. Fabrication Characteristics** **Forming Performance:** - **Good Formability**: Suitable for cold coiling operations - **Springback Characteristics**: Predictable and consistent - **Surface Quality**: Adequate for most spring applications - **Winding Performance**: Good for automatic spring coiling machines **Heat Treatment Considerations:** - **Stress Relieving**: Recommended after forming (250-300°C) - **No Hardening Required**: Properties achieved through cold drawing - **Temperature Limits**: Maximum service temperature 120°C (250°F) **Surface Finish:** - **Standard Finish**: Bright or slightly oxidized surface - **Surface Defects**: Minimal for satisfactory performance - **Coating Compatibility**: Good for plating and coating processes **Quality Assurance:** - **Tensile Testing**: Required for each lot - **Torsion Testing**: Mandatory quality control - **Dimensional Checks**: Standard tolerances apply - **Surface Inspection**: Visual examination required --- ### **Technical Summary** ASTM A227 Class I represents a cost-effective, general-purpose cold-drawn spring steel wire that provides reliable performance for a wide range of mechanical spring applications. The high carbon content (0.85-0.95%) combined with the cold drawing process produces the necessary strength and spring properties without requiring additional heat treatment. This class offers an excellent balance between strength, ductility, and cost-effectiveness, making it suitable for volume production of springs where premium performance characteristics are not required. The material's consistent mechanical properties and good formability facilitate efficient manufacturing processes in spring production. While not suitable for high-stress or high-temperature applications that require oil-tempered or other premium spring wires, ASTM A227 Class I has established itself as a reliable choice for general mechanical springs in industrial, automotive, and consumer products. Its proven performance history and economical nature continue to make it a popular selection for manufacturers seeking consistent quality and reliable performance in standard spring applications. -:- For detailed product information, please contact sales. -: ASTM A227 Steel Wire, Class I Specification Dimensions Size： Diameter 20-1000 mm Length <4343 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 A227 Steel Wire, Class I Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A227 Steel Rod Wire, Class I -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A227 Steel Rod Wire, Class I -:- For detailed product information, please contact sales. -:

Packing of ASTM A227 Steel Rod 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 Rod 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 814 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