ASTM A485 Steel Wire, Grade 4

ASTM A485 Steel Wire, Grade 4 Product Information -:- For detailed product information, please contact sales. -: ASTM A485 Steel Wire, Grade 4 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A485 Steel, Grade 4 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A485 Grade 4 High-Hardenability Steel** #### **1. Overview** ASTM A485 Grade 4 is the highest hardenability grade within the A485 specification series, designed for applications requiring maximum depth of hardening in extremely large cross-sections. This premium bearing steel offers unparalleled through-hardening characteristics, making it suitable for the most demanding heavy-duty applications where consistent hardness in massive components is critical. #### **2. Key International Standards** - **Primary Standard:** **ASTM A485** - Standard Specification for High Hardenability Anti-Friction Bearing Steel - **Processing Condition:** Supplied in spheroidize annealed condition for optimal machinability - **International Equivalents:** - **ISO 683-17:** 100CrMnMoSi7-4-2 - **DIN:** 100CrMnMoSi7-4-2 - **JIS G4805:** SUJ5 (enhanced variant) #### **3. Chemical Composition (Weight %)** | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.95-1.10 | | Manganese (Mn) | 1.20-1.50 | | Silicon (Si) | 0.50-0.80 | | Chromium (Cr) | 1.30-1.65 | | Molybdenum (Mo) | 0.45-0.65 | | Nickel (Ni) | 0.25-0.45 | | Phosphorus (P), max | 0.025 | | Sulfur (S), max | 0.025 | *Note: The enhanced alloy package including nickel provides the maximum hardenability in the A485 series.* #### **4. Mechanical & Physical Properties** **Heat Treated Properties (Oil Quenched & Tempered):** - **Hardness:** 60-67 HRC (typical) - **Tensile Strength:** 2150-2550 MPa (312-370 ksi) - **Yield Strength:** 1750-2150 MPa (254-312 ksi) - **Compressive Strength:** Excellent for heavy load applications **Physical Properties:** - **Density:** 7.85 g/cm³ - **Modulus of Elasticity:** 207 GPa - **Thermal Conductivity:** 39 W/m·K (at 100°C) - **Coefficient of Thermal Expansion:** 12.2 × 10⁻⁶/K (20-100°C) - **Critical Diameter (Ideal):** >150 mm in oil quench #### **5. Product Applications** - **Extra-Large Bearings:** Bearings with cross-sections exceeding 150 mm - **Heavy Industrial Equipment:** Rolling mill bearings, large gearbox components - **Mining Machinery:** Giant crusher bearings, excavator swing bearings - **Energy Sector:** Wind turbine main bearings, hydroelectric generator bearings - **Aerospace:** Large aircraft landing gear bearings - **Special Machinery:** Large precision equipment components #### **6. Key Characteristics & Advantages** - **Maximum Hardenability:** Unparalleled depth of hardening in massive sections - **Exceptional Wear Resistance:** Superior performance under extreme contact stresses - **Outstanding Fatigue Life:** Excellent resistance to rolling contact fatigue - **Dimensional Stability:** Minimal distortion in large components during heat treatment - **Reliability:** Consistent performance in critical applications #### **7. Heat Treatment Requirements** - **Annealing:** Spheroidize annealed at 770-790°C - **Hardening:** Austenitize at 845-865°C, oil quench - **Tempering:** 150-180°C for maximum hardness applications - **Hardenability Band:** J15=15 min (Jominy test) #### **8. Fabrication Considerations** - **Machining:** Requires careful machining in annealed condition (195-241 HB) - **Grinding:** Demands specialized grinding techniques for large components - **Heat Treatment Control:** Critical for large mass components - **Quality Assurance:** Comprehensive NDT testing recommended - **Cost Considerations:** Premium material for most demanding applications ASTM A485 Grade 4 represents the pinnacle of bearing steel technology, providing manufacturers with the ultimate solution for applications where maximum hardenability, exceptional wear resistance, and reliable performance in massive cross-sections are absolute requirements for successful operation in the world's most demanding industrial environments. -:- For detailed product information, please contact sales. -: ASTM A485 Steel, Grade 4 Specification Dimensions Size： Diameter 20-1000 mm Length <4398 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 4 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A485 Steel Wire, Grade 4 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A485 Steel Wire, Grade 4 -:- For detailed product information, please contact sales. -:

Packing of ASTM A485 Steel Wire, Grade 4 -:- 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 Wire 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 869 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