Q600q STEEL – STRUCTURAL STEEL
Q600q STEEL – STRUCTURAL STEEL
Q600q is a high-strength structural steel commonly used in demanding construction projects like bridges and high-rise buildings. The “Q” in its name stands for “Quenching,” a heat treatment process that enhances the steel’s strength and toughness. The “600” indicates a minimum yield strength of 600 MPa, ensuring the material can withstand heavy loads and dynamic forces.
Description
What is Q600q
Q600q is a high-strength structural steel composed of approximately 97-99% iron and 1-3% alloying elements such as carbon, manganese, and silicon. It typically comes in solid, flat plate forms and is often greyish in color. As a structural steel, Q600q is known for its superior strength, excellent toughness, and good weldability. It is primarily used in bridge construction, high-rise buildings, and heavy machinery due to its ability to handle heavy loads and resist impact. The steel is processed through hot rolling to achieve its desired mechanical properties.Characteristics of Q600q
Q600q steel is known for its high strength, with a yield strength typically exceeding 600 MPa, making it suitable for structural applications requiring heavy load support. It offers excellent weldability, allowing for reliable use in construction projects. Additionally, Q600q steel has good corrosion resistance, ensuring long-term durability even in harsh environments. Despite its high strength, the steel remains workable, allowing for cold bending, stamping, and other processing operations. This versatility makes Q600q steel widely used in the construction of buildings, bridges, tunnels, and other infrastructure, particularly where high strength and durability are essential.Chemical Compositions
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Silicon (Si) | ≤ 0.50 |
| Manganese (Mn) | 1.0 – 1.6 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.30 |
| Molybdenum (Mo) | ≤ 0.10 |
| Copper (Cu) | ≤ 0.40 |
| Niobium (Nb) | 0.02 – 0.06 |
| Vanadium (V) | 0.02 – 0.10 |
Physical Properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.283 lb/in³ |
| Melting Point | 1425-1470°C | 2597-2678°F |
| Boiling Point | Not typically specified | Not typically specified |
| Thermal Conductivity | 45-55 W/m·K | 26-32 Btu·ft/h·ft²·°F |
| Electrical Conductivity | 10-15% IACS | 10-15% IACS |
| Specific Heat Capacity | 450-500 J/kg·K | 0.108-0.119 Btu/lb·°F |
| Thermal Expansion Coefficient | 11-13 × 10⁻⁶ /°C | 6.1-7.2 × 10⁻⁶ /°F |
| Electrical Resistivity | 0.2-0.4 µΩ·m | 0.12-0.24 µΩ·ft |
Mechanical Properties
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 600-800 MPa | 87,000-116,000 psi |
| Yield Strength | 600 MPa | 87,000 psi |
| Brinell Hardness (HB) | 200-250 HB | 200-250 HB |
| Rockwell Hardness (HRC) | 20-25 HRC | 20-25 HRC |
| Vickers Hardness (HV) | 210-260 HV | 210-260 HV |
| Elongation | 15-20% | 15-20% |
| Elastic Modulus | 200 GPa | 29,000 ksi |
Mechanical properties of Q600q steel after QT processing:
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 700-900 MPa | 101,500-130,500 psi |
| Yield Strength | 600-700 MPa | 87,000-101,500 psi |
| Impact Toughness | ≥ 40 J (at -20°C) | ≥ 30 ft·lbf (at -4°F) |
| Elongation | 15-18% | 15-18% |
| Reduction of Area | ≥ 50% | ≥ 50% |
| Elastic Modulus | 200 GPa | 29,000 ksi |
Industries & Applications
| Industry | Key Components/Applications |
|---|---|
| Bridge Construction | Girders, Trusses, Deck Plates |
| High-Rise Buildings | Columns, Beams, Braces |
| Heavy Machinery and Equipment | Excavator Arms, Bulldozer Blades, Crane Booms |
| Critical Infrastructure | Power Plant Structural Components, Offshore Platform Structures, Industrial Facility Structures |
| Automotive | Chassis Frames, Suspension Components, Body Panels, Engine Parts |
| Shipbuilding | Hull Structures, Bulkheads, Decks, Frames |
Machining
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