Spherical ASTM A485 Steel Powder, Grade 2

ASTM A485 Steel Spherical Powder, Grade 2 Product Information -:- For detailed product information, please contact sales. -: ASTM A485 Steel Spherical Powder, Grade 2 Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A485 Steel Powder, Grade 2 characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A485 Steel Powder, Grade 2 Particle Size -:- For detailed product information, please contact sales. -: -:- -:- 0-15μm ,5-25μm, 15-45μm, 15-53μm,20-63um, 45-75μm, 45-105μm, 45-150μm ,75-150μm. (Various granularities can be customized according to customer requirements) -:- For detailed product information, please contact sales. -:

Spherical ASTM A485 Steel Powder, Grade 2 Applicable processes -:- For detailed product information, please contact sales. -: Laser/electron beam additive manufacturing (SLM/EBM, 3D printing) Direct laser deposition (DLD) Used in thermal spray (TSA) Powder hot isostatic pressing (HIP) Metal injection molding (MIM) Powder metallurgy (PM) Laser cladding (LC), etc. -:- For detailed product information, please contact sales. -: Spherical ASTM A485 Steel Powder, Grade 2 Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A485 Steel, Grade 2 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A485 Grade 2 Alloy Steel for High-Stress Springs** **Overview** ASTM A485 Grade 2 is a **chromium-silicon alloy spring steel** specified within the ASTM A485 standard for high-hardenability bearing-quality steel. It is classified as one of the premier **high-performance spring steels** due to its excellent combination of high strength, superior fatigue resistance, and good toughness. While historically categorized under a bearing steel standard, Grade 2 (along with Grades 1, 3, and 4) is predominantly used in the manufacture of **critical, high-stress helical springs** requiring maximum reliability and durability. This grade is specifically designed to be **through-hardened** in larger cross-sections, ensuring a uniform martensitic microstructure after quenching. It is typically supplied in the **annealed or hot-rolled condition** and requires final heat treatment (austenitizing, quenching, and tempering) by the spring manufacturer to achieve its exceptional mechanical properties. **Key International Standards & Designations** * **Governing Standard:** **ASTM A485 - Standard Specification for High Hardenability Antifriction Bearing Steel** (Grades 1-4 are spring steel variants). * **SAE/AISI Equivalent:** **SAE 9254** (a direct equivalent, widely referenced in automotive specifications). * **UNS Designation:** **G51986** * **Common Name:** Often referred to as **"Chrome-Silicon" (Cr-Si) spring steel**, denoting its key alloying elements. * **Other Regional Standards:** Corresponds to similar grades in international standards such as **DIN 1.7103** (Germany) and **JIS SUP12** (Japan). **Chemical Composition** The composition of Grade 2 is optimized for deep hardenability, high elastic limit, and fatigue strength. | Element | Composition Range (%) | | :--- | :--- | | Carbon (C) | 0.50 - 0.60 | | Manganese (Mn) | 0.70 - 0.95 | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.040 max | | Silicon (Si) | 1.20 - 1.60 | | Chromium (Cr) | 0.60 - 0.80 | | Nickel (Ni) | 0.35 max (residual) | | Copper (Cu) | 0.20 max (residual) | **Key Characteristics:** The elevated **Silicon (Si)** content significantly increases the steel's resistance to decarburization during heat treatment, preserves the surface integrity critical for fatigue life, and raises the elastic limit. **Chromium (Cr)** enhances hardenability and contributes to strength and wear resistance. **Physical & Mechanical Properties (After Heat Treatment)** *Note: Final properties are developed by the spring manufacturer through quenching and tempering.* 1. **Tensile Strength:** Extremely high, typically in the range of **1700 - 2100 MPa (245 - 305 ksi)** when tempered to common spring hardness levels. 2. **Hardness Range (Tempered):** Commonly tempered to **HRC 45 - 52** for optimal spring performance, balancing strength and required ductility. 3. **Fatigue Strength:** **Outstanding.** This is the hallmark of Grade 2. The combination of a clean, homogeneous microstructure, high surface quality, and silicon's effect on the elastic limit results in exceptional resistance to fatigue failure under cyclic loading. 4. **Hardenability:** Excellent, as defined by its **Jominy Hardenability Bands** in ASTM A485. It can be through-hardened in significantly larger sections than carbon spring steels (e.g., ASTM A229), ensuring uniform properties in heavy wire and bar. 5. **Toughness & Impact Resistance:** Good for its strength level, providing a safety margin against sudden brittle fracture. 6. **High-Temperature Properties:** Retains strength and resistance to relaxation (set) at moderately elevated temperatures better than plain carbon steels, making it suitable for engine environments. **Typical Product Applications** ASTM A485 Grade 2 is the material of choice for the most demanding, safety-critical spring applications where performance and longevity are paramount. * **Automotive Valve Springs:** The quintessential application for high-performance and racing engines, where extreme stress and high-cycle fatigue resistance are required. * **High-Stress Suspension Springs:** Coil springs for performance vehicles, heavy-duty trucks, and racing applications. * **Clutch Springs & Diaphragm Springs:** In high-torque automotive and industrial systems. * **Critical Industrial Springs:** For heavy machinery, oil and gas equipment, and aerospace components where failure is not an option. * **Anti-Roll Bars (Stabilizer Bars):** Especially in performance-oriented and commercial vehicles. **Available Forms & Processing** * **Forms:** Supplied as **hot-rolled or cold-drawn bar stock**, **hot-rolled wire rod**, and **cold-drawn spring wire** (in annealed condition). * **Condition:** Almost exclusively in the **spheroidize-annealed** condition to ensure optimum formability for the cold coiling or hot winding process. * **Manufacturing Route:** Springs are formed in the soft state, then undergo a full heat treatment cycle: **Austenitize → Oil Quench → Temper**. Stringent control of the heat treatment process and prevention of surface decarburization are critical. **Comparison & Selection Guidance** * **vs. Grade 1:** Grade 2 has higher Si and Cr, offering superior fatigue strength, higher tempering resistance, and better decarburization resistance. * **vs. ASTM A401 (Cr-Si Oil-Tempered Wire):** A401 is supplied pre-hardened (oil-tempered) by the wire mill for smaller diameters. A485 Grade 2 material is heat-treated *after* spring forming, allowing for more complex shapes and larger sections. * **vs. SAE 5160 (Cr spring steel):** Grade 2 (SAE 9254) generally offers better fatigue performance and hardenability due to its significant silicon content. **Conclusion** ASTM A485 Grade 2 (SAE 9254) represents a top-tier alloy spring steel engineered for ultimate performance. Its superior fatigue strength, excellent hardenability, and good toughness make it the preferred choice for designers of critical springs operating under extreme stress conditions. While it requires careful heat treatment processing, the resulting springs offer unmatched reliability and life cycle performance, justifying its use in the most demanding automotive, aerospace, and industrial applications. -:- For detailed product information, please contact sales. -: ASTM A485 Steel, Grade 2 Specification Dimensions Size： Diameter 20-1000 mm Length <5204 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 A485 Steel, Grade 2 Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A485 Steel Powder, Grade 2 Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A485 Steel Powder, Grade 2 -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A485 Steel Spherical Powder, Grade 2 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A485 Steel Spherical Powder, Grade 2 -:- For detailed product information, please contact sales. -:

Packing of ASTM A485 Steel Spherical Powder, Grade 2 -:- 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 Spherical Powder 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 1675 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