Mild Steel Plate (Low-Carbon Steel Plate/Soft Steel Plate) is one of the most fundamental steel products in industry. It refers to carbon structural steel with a low carbon content (typically between 0.05% and 0.25%), making it the most commonly used steel type in construction engineering and machinery manufacturing.
1. Core Characteristics: Why is it the most widely used?
Low Carbon Content: Due to its low carbon content, it is not as hard and brittle as high-carbon steel, making it highly machinable.
Easy to Process: It possesses excellent weldability, cuttability, and bendability, allowing operations like bending and stamping without complex heat treatment.
Cost-Effective: With minimal alloying elements, it offers low raw material and processing costs, delivering high value for money.
Magnetic Properties: Exhibits ferromagnetic characteristics.
2. Common Grades and Standards
| Grade System | Typical Grade | Standard | Surface Condition | Common Size (mm) | Main Applications |
| GB (China) | Q235B | GB/T 700 | Hot rolled black, pickled, painted | Thickness: 3–200 | General structures, pipes, brackets, machinery parts |
| Width: 1000–2500 | |||||
| Length: 6000–12000 | |||||
| Q195 | GB/T 700 | Hot rolled | 1.5–10 | Stamping parts, wire, pipe making | |
| EN (Europe) | S235JR | EN 10025-2 | Hot rolled, pickled, coated | 3–200 | General engineering, steel structures, fabrication |
| ASTM (USA) | A36 | ASTM A36 | Hot rolled, painted | 6–200 | Construction, bridges, general plates |
| JIS (Japan) | SS400 | JIS G3101 | Hot rolled, pickled | 3–200 | General structure, machinery, base plate |
