Products Description
Q235B is a variant of Q235 steel, sharing a similar composition but offering slightly enhanced properties. Like Q235, Q235B is composed of over 98% iron with small amounts of carbon, silicon, manganese, phosphorus, and sulfur.
Q235B is processed through hot rolling and is known for its improved weldability, plasticity, and ductility compared to the standard Q235. Both are low-carbon steels, but Q235B is often preferred for applications requiring better performance in structural components, including buildings, bridges, shipbuilding, and vehicle manufacturing
Chemical Compositions
| Element | Percentage (%) |
|---|
| Carbon (C) | ≤ 0.22 |
| Silicon (Si) | ≤ 0.35 |
| Manganese (Mn) | 0.30 – 0.70 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.045 |
| Iron (Fe) | Balance |
Physical Properties
| Property | Value (Metric) | Value (Imperial) |
|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Melting Point | 1,510°C | 2,750°F |
| Boiling Point | N/A | N/A |
| Thermal Conductivity | 43 W/m·K | 298 BTU·in/h·ft²·°F |
| Electrical Conductivity | 6.93 MS/m | 10.0% IACS |
| Specific Heat Capacity | 486 J/kg·K | 0.116 BTU/lb·°F |
| Thermal Expansion Coefficient | 11.7 µm/m·°C | 6.5 µin/in·°F |
| Electrical Resistivity | 144 nΩ·m | 71 µΩ·in |
Mechanical Properties
| Property | Metric | Imperial |
|---|
| Tensile Strength | 370-500 MPa | 53.7-72.5 ksi |
| Yield Strength | ≥235 MPa | ≥34.1 ksi |
| Brinell Hardness (HB) | 100-160 HB | 100-160 HB |
| Rockwell Hardness (HRB) | 55-80 HRB | 55-80 HRB |
| Vickers Hardness (HV) | 120-180 HV | 120-180 HV |
| Elongation | 20-26% | 20-26% |
| Elastic Modulus | 200 GPa | 29,000 ksi |
Industries & Applications
| Industry | Products |
|---|
| Construction | Beams, Columns, Roofing Sheets, Scaffoldings |
| Shipbuilding | Hull Plates, Bulkheads, Deck Structures, Ship Frames |
| Vehicle Manufacturing | Chassis Frames, Body Panels, Engine Mounts, Suspension Components |
| Tool Manufacturing | Cutting Tools, Molds, Dies, Measuring Instruments |
| Agriculture | Tractor Frames, Plow Blades, Irrigation Equipment, Barn Structures |
| Energy (Oil & Gas) | Pipeline Sections, Offshore Platforms, Drill Rig Components, Storage Tanks |
| Aerospace | Aircraft Frames, Landing Gear Parts, Wing Structures, Fuselage Panels |
| Heavy Machinery | Excavator Arms, Bulldozer Blades, Crane Booms, Forklift Frames |
| Railway | Train Carriage Frames, Railway Tracks, Signal Towers, Structural Support for Stations |
