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Technical Specifications
Product Overview
Metallurgical Characteristics
GB 35CrMo is a low-alloy structural steel with chrome-molybdenum composition designed for high-strength applications requiring excellent hardenability and toughness. The chromium content enhances hardenability and provides moderate corrosion resistance, while molybdenum improves high-temperature strength and prevents temper brittleness. The balanced carbon content ensures optimal strength-to-toughness ratio after proper heat treatment.
Heat Treatment Process
MetalZenith employs controlled heat treatment processes to optimize mechanical properties. Normalizing is performed at 870-900°C followed by air cooling. For maximum strength, quenching from 840-870°C in oil or water is followed by tempering at 500-650°C depending on desired hardness levels. Critical cooling rates and precise temperature control ensure uniform microstructure and consistent properties.
Manufacturing Process
Production begins with electric arc furnace melting using high-quality raw materials and precise alloy additions. Secondary refining through ladle furnace treatment removes impurities and adjusts chemistry. Continuous casting produces high-quality billets which undergo controlled hot rolling to achieve desired dimensions and mechanical properties. Advanced process control ensures consistent quality throughout production.
Quality Standards and Testing
All GB 35CrMo steel products undergo comprehensive testing including chemical analysis by optical emission spectroscopy, mechanical testing per GB/T 228 standards, ultrasonic testing for internal soundness, and dimensional verification. MetalZenith maintains ISO 9001:2015 certification and provides complete material test certificates with full traceability documentation for every shipment.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.32-0.40 |
| Silicon (Si) | 0.17-0.37 |
| Manganese (Mn) | 0.40-0.70 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | 0.80-1.10 |
| Molybdenum (Mo) | 0.15-0.25 |
| Nickel (Ni) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.25 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | 980-1180 MPa |
| Yield Strength (Rp0.2) | ≥ 785 MPa |
| Elongation (A5) | ≥ 12% |
| Reduction of Area (Z) | ≥ 45% |
| Hardness (HB) | 293-352 |
| Impact Energy (KV2, 20°C) | ≥ 63 J |
| Fatigue Limit (10^7 cycles) | 490 MPa |
| Elastic Modulus | 210 GPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1450-1520°C |
| Thermal Conductivity (20°C) | 42 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 11.5×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.25 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, square bars, flat bars, plates, sheets, forgings, tubes |
| Round Bar Diameter | 10-500 mm |
| Plate Thickness | 6-200 mm |
| Length | Up to 12 meters (custom lengths available) |
| Standards | GB/T 3077, GB/T 711, ASTM A29, EN 10083 |
| Surface Finish | Hot rolled, cold drawn, peeled, ground, machined |
| Dimensional Tolerance | h9, h11 (precision grades available) |
| Heat Treatment Condition | Annealed, normalized, quenched and tempered |
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Our Advantages in Processing GB 35CrMo
Advanced Metallurgical Control
MetalZenith utilizes sophisticated electric arc furnace technology with precise alloy addition systems and secondary refining processes to achieve optimal chemical composition control and eliminate impurities, ensuring consistent mechanical properties and superior steel quality.
Comprehensive Heat Treatment Capabilities
Our state-of-the-art heat treatment facilities feature computer-controlled furnaces with precise temperature and atmosphere control, enabling customized quenching and tempering processes to achieve specific hardness and toughness requirements for diverse applications.
Global Supply Chain Excellence
MetalZenith maintains strategic inventory locations worldwide and offers flexible customization services including precision cutting, machining, and surface treatments, supported by comprehensive technical consultation and rapid delivery capabilities to meet urgent project requirements.
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