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Technical Specifications
Product Overview
Metallurgical Characteristics
HSLA 350 steel features a fine-grained ferrite-pearlite microstructure with controlled precipitation of microalloying elements including vanadium, niobium, and titanium. The thermomechanical controlled processing (TMCP) employed by MetalZenith promotes grain refinement and precipitation strengthening, resulting in enhanced strength without compromising ductility and toughness.
Heat Treatment & Processing
MetalZenith's HSLA 350 is produced through controlled rolling in the austenite recrystallization temperature range (1000-1100°C), followed by accelerated cooling to optimize the final microstructure. The steel is typically supplied in the as-rolled condition and does not require additional heat treatment. Stress relieving can be performed at 580-650°C if required for specific applications.
Manufacturing Process Excellence
Our integrated production process begins with electric arc furnace steelmaking, followed by ladle refining and continuous casting. The hot rolling process utilizes computer-controlled rolling schedules to achieve precise mechanical properties. Advanced process control systems monitor temperature, reduction ratios, and cooling rates to ensure consistent quality throughout production.
Quality Standards & Testing
MetalZenith maintains comprehensive quality assurance protocols including chemical analysis via optical emission spectroscopy, mechanical testing per ASTM standards, ultrasonic testing for internal soundness, and dimensional verification. All products are supplied with certified test reports and full material traceability documentation. Our quality management system complies with ISO 9001:2015, ISO 14001, and OHSAS 18001 standards.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.23 |
| Manganese (Mn) | 0.90 - 1.65 |
| Silicon (Si) | 0.15 - 0.50 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | ≤ 0.50 |
| Nickel (Ni) | ≤ 0.50 |
| Molybdenum (Mo) | ≤ 0.35 |
| Copper (Cu) | ≤ 0.35 |
| Aluminum (Al) | 0.015 - 0.065 |
| Nitrogen (N) | ≤ 0.015 |
| Vanadium (V) | ≤ 0.10 |
| Niobium (Nb) | ≤ 0.05 |
| Titanium (Ti) | ≤ 0.15 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Minimum Yield Strength | 350 MPa (51 ksi) |
| Tensile Strength | 450 - 590 MPa (65 - 86 ksi) |
| Elongation (50mm gauge) | ≥ 20% |
| Elongation (200mm gauge) | ≥ 18% |
| Brinell Hardness (HB) | 140 - 180 |
| Charpy V-Notch Impact (at 0°C) | ≥ 27 J (20 ft-lbs) |
| Charpy V-Notch Impact (at -20°C) | ≥ 20 J (15 ft-lbs) |
| Fatigue Limit (107 cycles) | 180 - 220 MPa |
| Young's Modulus | 210 GPa (30.5 Msi) |
| Poisson's Ratio | 0.27 - 0.30 |
| Shear Modulus | 80 GPa (11.6 Msi) |
| Reduction of Area | ≥ 50% |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ (0.284 lb/in³) |
| Melting Point | 1510°C (2750°F) |
| Thermal Conductivity (at 20°C) | 54 W/m·K (31 BTU/hr·ft·°F) |
| Thermal Expansion Coefficient (20-100°C) | 12×10-6/K (6.7×10-6/°F) |
| Specific Heat Capacity | 500 J/kg·K (0.12 BTU/lb·°F) |
| Electrical Resistivity (at 20°C) | 0.16 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C (1418°F) |
| Thermal Diffusivity | 13.8×10-6 m²/s |
| Emissivity (oxidized surface) | 0.79 |
| Sound Velocity (longitudinal) | 5900 m/s |
| Damping Capacity | 0.004 - 0.008 |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Hot Rolled Plate, Hot Rolled Sheet, Cold Rolled Sheet, Coil, Strip |
| Thickness Range | 1.2 - 100 mm (0.047 - 3.94 in) |
| Width Range | 600 - 2500 mm (23.6 - 98.4 in) |
| Length Range | 1000 - 12000 mm (39.4 - 472 in) |
| Coil Weight | Up to 35 tons |
| Surface Finish | Hot Rolled, Pickled & Oiled, Cold Rolled, Galvanized |
| Edge Condition | Mill Edge, Slit Edge, Trimmed Edge |
| Thickness Tolerance | ±0.05 - ±0.50 mm (per ASTM A656) |
| Width Tolerance | ±3.0 - ±6.0 mm |
| Length Tolerance | ±6.0 - ±25 mm |
| Flatness | ≤ 5 mm/m |
| Standards Compliance | ASTM A656, EN 10149-2, JIS G3106, GB/T 16270 |
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Our Advantages in Processing HSLA 350
Advanced Thermomechanical Processing
MetalZenith employs cutting-edge controlled rolling and accelerated cooling technologies to achieve optimal microstructure refinement, ensuring superior mechanical properties and consistent grain size distribution throughout the material cross-section.
Comprehensive Quality Control Systems
Our integrated quality management system features real-time monitoring, automated testing protocols, and statistical process control to guarantee material consistency. Every batch undergoes rigorous mechanical testing, chemical analysis, and non-destructive evaluation.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision cutting, forming, and heat treatment services. Our global distribution network ensures reliable delivery worldwide with full traceability and technical support throughout the supply chain.
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