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Technical Specifications
Product Overview
Metallurgical Characteristics
GB Q960 is a premium ultra-high strength structural steel produced through advanced quenching and tempering processes. The steel features a fine-grained martensitic microstructure with tempered martensite, providing exceptional strength-to-weight ratio and superior toughness. MetalZenith's proprietary alloy design incorporates precise amounts of chromium, nickel, and molybdenum to enhance hardenability and achieve uniform mechanical properties throughout the cross-section.
Heat Treatment Process
The manufacturing process involves controlled austenitizing at 880-920°C followed by rapid quenching in water or polymer solutions to achieve full martensitic transformation. Subsequent tempering at 580-650°C optimizes the balance between strength and toughness while relieving internal stresses. MetalZenith's advanced heat treatment facilities ensure precise temperature control and uniform heating throughout the material volume.
Manufacturing Excellence
MetalZenith employs state-of-the-art electric arc furnaces with secondary refining capabilities including ladle metallurgy and vacuum degassing to achieve ultra-low sulfur and phosphorus contents. Continuous casting technology ensures homogeneous chemical composition and minimal segregation. Hot rolling is performed using computer-controlled rolling mills with precise temperature and deformation control to optimize grain structure and mechanical properties.
Quality Standards & Certifications
All GB Q960 products manufactured by MetalZenith comply with GB/T 1591-2018 standards and are produced under ISO 9001:2015 certified quality management systems. Comprehensive testing includes chemical analysis by optical emission spectroscopy, mechanical testing per GB/T 228.1, impact testing at various temperatures, and ultrasonic examination for internal soundness. Third-party inspection and certification are available upon request.
Weldability & Fabrication
GB Q960 exhibits good weldability when proper procedures are followed. Preheating to 150-200°C is recommended for thick sections, and post-weld stress relief may be required for critical applications. MetalZenith provides comprehensive welding procedure specifications and technical support to ensure optimal joint properties. The steel can be formed, machined, and fabricated using conventional methods with appropriate tooling and parameters.
🧪 Chemical Composition
| Element | Content (%) | Purpose |
|---|---|---|
| Carbon (C) | ≤ 0.20 | Strength and hardness |
| Manganese (Mn) | 0.80-1.70 | Deoxidation and strength |
| Silicon (Si) | 0.15-0.60 | Deoxidation and strength |
| Phosphorus (P) | ≤ 0.025 | Controlled impurity |
| Sulfur (S) | ≤ 0.015 | Controlled impurity |
| Chromium (Cr) | 0.30-1.50 | Hardenability and strength |
| Nickel (Ni) | 0.30-2.00 | Toughness and strength |
| Molybdenum (Mo) | 0.15-0.70 | Hardenability and creep resistance |
| Vanadium (V) | 0.02-0.12 | Grain refinement |
| Niobium (Nb) | 0.015-0.060 | Precipitation strengthening |
| Titanium (Ti) | 0.006-0.050 | Grain refinement |
| Aluminum (Al) | 0.015-0.060 | Deoxidation and grain refinement |
⚙️ Mechanical Properties
| Property | Value | Test Standard |
|---|---|---|
| Yield Strength (ReH) | ≥ 960 MPa | GB/T 228.1 |
| Tensile Strength (Rm) | 980-1180 MPa | GB/T 228.1 |
| Elongation (A50) | ≥ 12% | GB/T 228.1 |
| Elongation (A80) | ≥ 10% | GB/T 228.1 |
| Impact Energy (-40°C) | ≥ 30 J | GB/T 229 |
| Impact Energy (-60°C) | ≥ 25 J | GB/T 229 |
| Brinell Hardness (HBW) | 300-380 | GB/T 231.1 |
| Young's Modulus | 210 GPa | GB/T 22315 |
| Poisson's Ratio | 0.30 | GB/T 22315 |
| Fatigue Limit (10&sup7; cycles) | 480 MPa | GB/T 4337 |
| Fracture Toughness (KIC) | ≥ 80 MPa·m1/2 | GB/T 4161 |
| Reduction of Area | ≥ 45% | GB/T 228.1 |
🔬 Physical Properties
| Property | Value | Temperature Range |
|---|---|---|
| Density | 7.85 g/cm³ | 20°C |
| Melting Point | 1510°C | - |
| Thermal Conductivity | 54 W/m·K | 20°C |
| Thermal Conductivity | 42 W/m·K | 100°C |
| Thermal Expansion Coefficient | 12×10-6/K | 20-100°C |
| Thermal Expansion Coefficient | 13.5×10-6/K | 20-200°C |
| Specific Heat Capacity | 500 J/kg·K | 20°C |
| Electrical Resistivity | 0.16 µΩ·m | 20°C |
| Magnetic Permeability | Ferromagnetic | 20°C |
| Curie Temperature | 770°C | - |
| Thermal Diffusivity | 13.7 mm²/s | 20°C |
| Coefficient of Thermal Expansion | 14.2×10-6/K | 20-400°C |
📏 Product Specifications
| Specification | Available Options | Standards |
|---|---|---|
| Product Forms | Plates, Sheets, Bars, Profiles, Tubes | GB/T 1591, GB/T 3274 |
| Plate Thickness | 3-100 mm | GB/T 3274 |
| Sheet Thickness | 0.5-3.0 mm | GB/T 3274 |
| Width Range | 600-3500 mm | GB/T 3274 |
| Length Range | 2000-18000 mm | GB/T 3274 |
| Bar Diameter | 10-300 mm | GB/T 702 |
| Surface Finish | Hot Rolled, Pickled, Shot Blasted | GB/T 3274 |
| Edge Condition | Mill Edge, Trimmed Edge | GB/T 3274 |
| Flatness Tolerance | ≤ 5 mm/m | GB/T 3274 |
| Thickness Tolerance | ± 0.3 mm (≤ 20mm), ± 0.5 mm (> 20mm) | GB/T 3274 |
| Width Tolerance | ± 5 mm | GB/T 3274 |
| Heat Treatment | Quenched and Tempered (QT) | GB/T 1591 |
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Our Advantages in Processing GB Q960
Advanced Quenching & Tempering Technology
MetalZenith employs state-of-the-art controlled cooling systems and precision tempering furnaces to achieve optimal microstructure refinement, ensuring consistent mechanical properties and superior toughness throughout the material cross-section.
Comprehensive Quality Control Systems
Our integrated quality management system includes real-time chemical composition monitoring, automated mechanical testing, and advanced non-destructive examination techniques, guaranteeing every product meets stringent GB/T 1591 standards.
Custom Processing & Global Supply Chain
MetalZenith offers extensive customization capabilities including precision cutting, forming, and surface treatment services, supported by our global logistics network ensuring timely delivery to customers worldwide.
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