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Technical Specifications
Product Overview
Metallurgical Characteristics
GB 16MnR is a low-alloy steel with enhanced manganese content, providing improved strength and toughness compared to conventional carbon steels. The controlled carbon content ensures excellent weldability while maintaining adequate strength for pressure vessel applications. The fine-grained microstructure achieved through controlled rolling and normalizing heat treatment contributes to superior mechanical properties and impact resistance.
Heat Treatment Process
MetalZenith employs precise normalizing heat treatment at 900-950°C followed by air cooling to achieve optimal microstructure. This process refines the grain structure, improves mechanical properties, and relieves internal stresses. Additional stress relief annealing at 600-650°C may be applied for thick sections to ensure dimensional stability and reduce residual stresses.
Manufacturing Process
Our manufacturing process begins with electric arc furnace melting using high-quality raw materials, followed by ladle refining for precise chemical composition control. The steel undergoes controlled rolling in our advanced hot rolling mills, ensuring uniform mechanical properties throughout the cross-section. Final processing includes precision cutting, surface treatment, and comprehensive quality inspection.
Quality Standards & Testing
All GB 16MnR products manufactured by MetalZenith comply with GB/T 713 standards and undergo rigorous testing including chemical analysis, tensile testing, impact testing, hardness measurement, and ultrasonic inspection. Third-party certification and mill test certificates are provided with each shipment, ensuring complete traceability and quality assurance for critical pressure vessel applications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.12-0.20 |
| Manganese (Mn) | 1.20-1.60 |
| Silicon (Si) | 0.20-0.55 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | ≤ 0.25 |
| Nickel (Ni) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.25 |
| Aluminum (Al) | ≥ 0.020 |
| Nitrogen (N) | ≤ 0.012 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | 450-590 MPa |
| Yield Strength (ReL) | ≥ 295 MPa |
| Elongation (A) | ≥ 21% |
| Impact Energy (KV2) at 20°C | ≥ 34 J |
| Impact Energy (KV2) at 0°C | ≥ 27 J |
| Brinell Hardness (HB) | 131-187 |
| Young's Modulus | 206 GPa |
| Poisson's Ratio | 0.30 |
| Fatigue Limit (10^7 cycles) | 225 MPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1510°C |
| Thermal Conductivity (20°C) | 52 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12.5×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.18 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Plates, Sheets, Bars, Forgings, Pipes |
| Plate Thickness | 6-200 mm |
| Sheet Thickness | 0.5-6 mm |
| Bar Diameter | 10-300 mm |
| Pipe Outer Diameter | 21.3-1219 mm |
| Standards Compliance | GB/T 713, ASME SA-516, EN 10028-2 |
| Surface Finish | Hot Rolled, Normalized, Pickled |
| Dimensional Tolerance | ±0.1-0.5 mm (depending on form) |
| Length | Up to 12 meters (custom lengths available) |
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Our Advantages in Processing GB 16MnR
Advanced Metallurgical Processing
MetalZenith employs cutting-edge controlled rolling and normalizing heat treatment processes, ensuring optimal grain refinement and superior mechanical properties. Our advanced furnace technology guarantees precise temperature control and uniform heating for consistent quality throughout the material.
Comprehensive Quality Control
Our state-of-the-art testing laboratory conducts rigorous chemical analysis, mechanical testing, ultrasonic inspection, and dimensional verification. Every batch undergoes complete traceability documentation and third-party certification to ensure compliance with international standards.
Custom Solutions & Global Supply
MetalZenith offers extensive customization capabilities including specific dimensions, surface finishes, and heat treatment conditions. Our global distribution network ensures reliable delivery worldwide with comprehensive technical support and engineering consultation services.
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