ASTM A401 Alloy Steel Tube,Pipe

ASTM A401 Alloy Steel Tube Wire Product Information -:- For detailed product information, please contact sales. -: ASTM A401 Alloy Steel Tube Wire Synonyms -:- For detailed product information, please contact sales. -:

ASTM A401 Alloy Steel Wire Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A401/A401M Standard Specification for Steel Wire, Chromium-Silicon Alloy** **1. Overview** ASTM A401 is a standard specification for high-strength, round, uncoated alloy steel wire primarily made from chromium-silicon alloy steel. This wire is characterized by its excellent combination of high tensile strength, good ductility, and remarkable fatigue resistance. It is most commonly used in the manufacture of mechanical springs, especially helical springs for high-stress applications where reliability and performance under repeated loading are critical. **2. Key International Standards** * **Primary Standard:** **ASTM A401/A401M** - Standard Specification for Steel Wire, Chromium-Silicon Alloy. * The 'M' designation indicates that the standard supports metric units. * **Related Standards:** * **ASTM A510M:** Standard Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel, and Alloy Steel (Metric). * **SAE J217:** Society of Automotive Engineers standard covering spring wire, which includes similar grades. * **Common Equivalent Grades:** * **EN (Europe):** 55Cr3, 61SiCr7 (The exact composition may vary, but these are typical spring steel grades). * **JIS (Japan):** SWOSC-V (SUP12 and SUP13 are also related valve spring wires). **3. Chemical Composition (Weight %)** The composition is defined by the specific "Class" within the standard, with Class I being the most common. The key alloying elements are Silicon and Chromium. **Typical Composition for Class I (Grade A, B, C):** | Element | Composition (%) | | :--- | :--- | | Carbon (C) | 0.51 - 0.59 | | Manganese (Mn) | 0.60 - 0.80 | | Phosphorus (P), max | 0.025 | | Sulfur (S), max | 0.025 | | Silicon (Si) | 1.20 - 1.60 | | Chromium (Cr) | 0.60 - 0.80 | *Note: The precise carbon range may vary slightly between Grades A, B, and C, which are defined by different tensile strength ranges. The high Silicon content is primarily responsible for the wire's high hardenability and resistance to decarburization.* **4. Mechanical & Physical Properties** The wire is supplied in the cold-wrought (hard-drawn) and heat-treated (patented or oil-tempered) condition to achieve its final properties. The key property is its **Tensile Strength**, which is specified by diameter. **Mechanical Properties:** * **Tensile Strength:** Highly dependent on wire diameter. Strength decreases as diameter increases. * **Example Ranges:** * For a 2.0 mm wire: ~1700-2000 MPa (247-290 ksi) * For a 5.0 mm wire: ~1500-1700 MPa (218-247 ksi) * For a 10.0 mm wire: ~1300-1500 MPa (189-218 ksi) * **Torsion Tests:** The wire must withstand a specified number of twists without failure, demonstrating good ductility and soundness. * **Wrap Tests:** The wire must be capable of being wrapped around a mandrel of a specified diameter without cracking, proving its formability. * **Hardness:** Typically in the range of 44-50 HRC (approximate conversion from tensile strength). **Approximate Physical Properties:** * **Density:** 7.85 g/cm³ * **Modulus of Elasticity (E):** ~200 GPa (29 x 10⁶ psi) * **Shear Modulus (G):** ~80 GPa (11.5 x 10⁶ psi) **5. Product Applications** ASTM A401 wire is almost exclusively used for the manufacture of high-performance springs due to its superior fatigue life and resilience. * **Valve Springs:** Critical application in internal combustion engines for automotive, motorcycle, and marine engines. * **Suspension Springs:** Coil springs for automotive and heavy-duty vehicle suspensions. * **High-Stress Helical Springs:** Used in industrial machinery, agricultural equipment, and aerospace applications. * **Clutch Springs:** and other dynamic spring applications where failure is not an option. **6. Key Characteristics & Advantages** * **Superior Fatigue Resistance:** The primary advantage of chromium-silicon alloy steel. It can withstand a high number of load cycles, making it ideal for dynamic spring applications. * **High Strength-to-Weight Ratio:** Provides high strength, allowing for the design of smaller, lighter springs. * **Good Hardenability:** The alloy composition allows for uniform hardening through the cross-section of the wire. * **Resistance to Relaxation:** Maintains its load-bearing capacity (resists sagging or taking a set) under prolonged stress better than many carbon spring steels. * **Heat Resistance:** Retains its properties at moderately elevated temperatures better than plain carbon steel springs. In summary, **ASTM A401 Chromium-Silicon Alloy Steel Wire** is a premium-grade material specifically engineered for the most demanding spring applications. Its excellent fatigue life and high strength make it the material of choice for critical components like engine valve springs, where performance and reliability are paramount. -:- For detailed product information, please contact sales. -: ASTM A401 Alloy Steel Wire Specification Dimensions Size： Diameter 20-1000 mm Length <4379 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 A401 Alloy Steel Wire Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A401 Alloy Steel Tube Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A401 Alloy Steel Tube Wire -:- For detailed product information, please contact sales. -:

Packing of ASTM A401 Alloy 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 850 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