---
title: Cold-Rolled Low Carbon Steel Sheet
desc: Has high strength and good welding performance, excellent surface quality and shape, suitable for hardware, pipes and building structural parts that have certain requirements for strength and processing performance.
models: 
  - GB/T 11253-2007: Q235
  - 2011 JX(19): LQ215
  - 2011 JX(21): THD
spec: 
  - 'Thickness: 0.6~2.0mm'
  - 'Width: 1000~1540mm'
slug: '5'
---

## Chemical Composition
| Grade | C | Mn | Si | P | S |
| :--- | :--- | :--- | :--- | :--- | :--- |
| Q235 | ≤0.22 | ≤1.40 | ≤0.35 | ≤0.035 | ≤0.035 |
| DX51D | ≤0.22 | ≤1.20 | ≤0.35 | ≤0.035 | ≤0.035 |
| S350GD | ≤0.22 | ≤1.20 | ≤0.35 | ≤0.035 | ≤0.035 |

## Mechanical Properties
| Grades | Yield strength/Re/MPa | Tensile strength/Rm/MPa | Elongation/A80/% | Hardness/HRB | 180° bending test (bend diameter d) |
| :--- | :--- | :--- | :--- | :--- | :--- |
| Q235 | ≥235 | 370-500 | ≥22 | - | d=1a |
| LQ215 | ≥215 | 335-450 | ≥24 | - | d=0.5a |
| THD | - | - | - | 65-80 | - |

---
1. When there is no obvious yield, use Rp0.2; otherwise use Rel.
2. Sample width B: When B＞20mm, take B=20mm; *a is sample thickness*.
3. Tensile test and bending test take transverse samples.
