Q235 is a plain carbon structural steel that is used throughout China. It is also known as Q235A, Q235B, Q235C, and Q235D. Since it is mild steel, it is utilized in production without heat treatment. The Q designates the yield point, and the 235 indicates the yield strength. Not only does Q235 possess toughness, weldability, and excellent plasticity, it retains strength while offering outstanding cold-bending performance. It is perfect for welded structures, including factory buildings, steel bars, towers, boilers, bridges, containers, vehicles, and more.
Application
Q235 also used as a mechanical part with less demanding performance such as less stressed rods, connecting rods, screws, nuts, ferrules, brackets, and stands, etc.
Chemical Composition of Q235 Steel
| Element | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| Content (%) | 0.12-0.20 | 0.30 | 0.30-0.70 | ≤0.045 | ≤0.050 |
The carbon content (C) in Q235 steel is usually between 0.12% and 0.20%, which makes it moderately hard and strong. The silicon content (Si) is usually 0.30%, which helps to improve the plasticity and weldability of Q235 steel. Manganese content (Mn) between 0.30% and 0.70% plays an important role in enhancing the strength and toughness of Q235 steel. The contents of phosphorus (P) and sulfur (S) are usually controlled at very low levels, ≤0.045% and ≤0.050%, respectively, to ensure good machinability and corrosion resistance of Q235 steel.
Q235 Mechanical Properties
| Performance | Value |
|---|---|
| Yield Strength (σy) | ≥ 235 MPa |
| Tensile Strength (σb) | 375-500 MPa |
| Elongation (δ) | ≥ 26% |
| Impact Toughness (J) | ≥ 27 J |
| Hardness (HB) | ≤ 201(for cone hardness tester) |
Partial part type display:
