Q235 is a versatile carbon structural steel with a yield strength of 235 MPa. It is known for its excellent weldability, formability, and machinability, making it ideal for various construction and engineering applications. Q235 steel gets its name from its yield strength designation. The “Q” stands for “yield point,” and “235” indicates that the yield strength is 235 MPa. This versatile and widely used carbon structural steel is renowned for its excellent weldability, formability, and machinability, making it suitable for various applications.
Property | Value (Metric) | Value (Imperial) |
---|---|---|
Tensile Strength | 515 – 730 MPa | 74,700 – 105,900 psi |
Yield Strength | ≥205 MPa | ≥29,700 psi |
Elongation | ≥40% | ≥40% |
Hardness (Brinell) | ≤217 HB | ≤217 HB |
Hardness (Rockwell B) | ≤95 HRB | ≤95 HRB |
Hardness (Vickers) | ≤225 HV | ≤225 HV |
Elastic Modulus | 200 GPa | 29,000 ksi |
Property | Metric | Imperial |
---|---|---|
Density | 7.85 g/cm³ | 0.284 lb/in³ |
Melting Point | 1400-1450°C | 2552-2642°F |
Thermal Conductivity | 24.3 W/m·K | 14.1 BTU·in/hr·ft²·°F |
Electrical Resistivity | 0.15 µΩ·m | 0.15 µΩ·m |
Specific Heat Capacity | 486 J/kg·K | 0.116 BTU/lb·°F |
Thermal Expansion Coefficient | 11.7 x 10⁻⁶ /°C | 6.5 x 10⁻⁶ /°F |
Property | Value (Metric) | Value (Imperial) |
---|---|---|
Tensile Strength | 370-500 MPa | 54-73 ksi |
Yield Strength | 235 MPa | 34 ksi |
Vickers Hardness (HV) | 80-180 | 80-180 |
Brinell Hardness (HB) | 70-160 | 70-160 |
Rockwell Hardness (HRC) | 52-56 | 52-56 |
Ductility | – | – |
Toughness | – | – |
Elongation | 20-26% | 20-26% |
Elasticity | – | – |
Elastic Modulus | 210 GPa | 30.5 Msi |
Applications | Components |
---|---|
Structural Components | Beams, Columns, Trusses, Brackets |
Machinery Parts | Nuts, Connecting Rods, Bearings, Gears |
Construction | Factory Buildings, Towers, Boilers, Bridges |
Automotive | Chassis, Engines, Suspension Systems, Transmissions |
Aerospace | Fuselages, Wings, Propulsion Systems, Landing Gear |
Transportation and Logistics | Containers, Railcars, Cargo Ships, Trucks |
Q235 Heat Treating Instructions: Q235 steel is typically used in its as-rolled condition and does not require additional heat treatment. If necessary, normalizing can be applied to improve its grain structure and mechanical properties.
Q235 Surface Finish: The surface of Q235 steel can be treated through various methods, including painting, galvanizing, or powder coating, to enhance corrosion resistance and improve durability, especially for outdoor or exposed applications.
Custom grades can be produced upon request to meet specific requirements.
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