Spherical ASTM A485 Steel Powder, Grade 1

ASTM A485 Steel Spherical Powder, Grade 1 Product Information -:- For detailed product information, please contact sales. -: ASTM A485 Steel Spherical Powder, Grade 1 Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A485 Steel Powder, Grade 1 characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A485 Steel Powder, Grade 1 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 1 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 1 Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A485 Steel, Grade 1 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A485 Grade 1 High Hardenability High Carbon Spring Steel** **Overview** ASTM A485 Grade 1 is a **high-carbon, high-hardenability alloy spring steel** specified under the ASTM A485 standard. It is engineered specifically for the production of **heavy-duty helical springs** and other critical spring applications where a fully martensitic structure throughout the cross-section is required after oil quenching. This grade achieves its exceptional hardenability through a balanced increase in manganese, chromium, and silicon content compared to standard carbon spring steels like ASTM A229. The primary advantage of Grade 1 is its ability to be **through-hardened** in larger section sizes, ensuring uniform high strength and optimal fatigue resistance in thick wire or bar forms. It is typically supplied in the **annealed or hot-rolled condition** and requires subsequent heat treatment (quenching and tempering) by the spring manufacturer to achieve its final mechanical properties. **Key International Standards** * **Primary Standard:** **ASTM A485 - Standard Specification for High Hardenability Antifriction Bearing Steel** * **Note:** Despite its title historically linking it to bearing applications, ASTM A485 is the predominant North American standard for high-hardenability spring steels. Grades 1-4 are exclusively used for springs. * **Common Cross-References:** * **SAE J1321:** Steel, Spring, Hardenability, Chromium-Silicon-Manganese (Chemical equivalent to Grade 1). * **UNS Designation:** G50986 * **Common Trade Name:** Often referred to as "Chrome-Silicon" spring steel (specifically for Grades 2-4; Grade 1 is a lower-alloy variant). **Chemical Composition** The composition of Grade 1 is carefully balanced to provide enhanced hardenability over plain carbon steel while maintaining good manufacturability. | Element | Composition Range (%) | | :--- | :--- | | Carbon (C) | 0.65 - 0.80 | | Manganese (Mn) | 0.85 - 1.20 | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.040 max | | Silicon (Si) | 0.40 - 0.60 | | Chromium (Cr) | 0.35 - 0.55 | | Nickel (Ni) | 0.25 max (residual) | | Copper (Cu) | 0.20 max (residual) | **Key Feature:** The elevated levels of **Mn, Si, and Cr** work synergistically to increase the depth of hardening, allowing for the successful quenching of larger diameters. **Physical & Mechanical Properties (After Heat Treatment)** *Note: Properties are developed after final austenitizing, oil quenching, and tempering.* 1. **Typical Hardness Range (Tempered):** **HRC 40 - 50** (common for springs), but can be tempered to other hardness levels for specific strength/ductility requirements. 2. **Tensile Strength:** Directly related to tempering temperature. Typically ranges from **1500 MPa (220 ksi) to over 1900 MPa (275 ksi)** at common spring hardnesses. 3. **Yield Strength & Elastic Limit:** Very high, a key requirement for spring performance. 4. **Fatigue Strength:** Excellent, due to the ability to achieve a uniform, fine-tempered martensitic microstructure free of soft core areas (which are weak points for fatigue crack initiation). 5. **Hardenability:** Its defining characteristic. Governed by **Jominy Hardenability Bands** specified in the standard. Grade 1 ensures sufficient martensite at specified distances from the quenched end to guarantee through-hardening of larger sections compared to non-alloyed grades. 6. **Machinability & Formability:** Fair in the annealed condition. It is more difficult to machine and form than lower-alloy steels due to its higher strength and work-hardening rate. **Typical Product Application** ASTM A485 Grade 1 is selected for demanding spring applications where section size and/or high, uniform strength are critical design factors. * **Heavy-Duty Automotive Springs:** Suspension coil springs for trucks, buses, and off-highway vehicles where wire/bar diameters are large. * **Large Industrial Valve Springs:** For large diesel engines and industrial compressors. * **High-Stress Mechanical Springs:** In agricultural equipment, railway rolling stock, and construction machinery. * **Anti-Roll Bars (Stabilizer Bars):** Especially in larger diameters requiring uniform torsional strength. * **Critical Applications Requiring Through-Hardening:** Any spring where the alternative (e.g., ASTM A229) would risk forming non-martensitic transformation products (like pearlite or bainite) at the core, leading to reduced fatigue life and unpredictable performance. **Available Forms & Processing** * **Forms:** Primarily supplied as **hot-rolled or cold-drawn bar**, and **hot-rolled or annealed wire** in coils. * **Condition:** Usually in **annealed or spheroidized annealed** condition for optimal formability prior to the spring maker's heat treatment. * **Manufacturing Process:** Springs are coiled/cold-formed in the soft condition, then undergo full heat treatment: **Austenitize → Oil Quench → Temper.** **Comparison & Selection Note** * **vs. ASTM A229 (Oil-Tempered Carbon Spring Wire):** A485 Grade 1 offers superior hardenability for larger diameters. A229 is pre-hardened (oil-tempered) by the wire mill and used for smaller diameters. * **vs. ASTM A401 (Chrome-Silicon Spring Wire):** A401 is similar in alloy content to A485 Grade 2/3/4 but is supplied pre-hardened (like A229). A485 material is heat-treated *after* spring forming. **Conclusion** ASTM A485 Grade 1 is a vital material in the spring engineer's toolkit for applications beyond the size limits of standard carbon spring steels. Its controlled chemistry ensures reliable through-hardening, resulting in springs with uniform high strength, excellent fatigue resistance, and dependable performance in the most demanding heavy-duty and high-stress environments. Successful application requires close collaboration between the steel producer, spring manufacturer, and heat treater to realize the full potential of this high-hardenability steel. -:- For detailed product information, please contact sales. -: ASTM A485 Steel, Grade 1 Specification Dimensions Size： Diameter 20-1000 mm Length <5203 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 1 Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A485 Steel Powder, Grade 1 Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A485 Steel Powder, Grade 1 -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A485 Steel Spherical Powder, Grade 1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A485 Steel Spherical Powder, Grade 1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A485 Steel Spherical Powder, Grade 1 -:- 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 1674 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