GB Chinese Standard Carbon Structural Steel Specification
Here we show the difference between Q195 vs Q215, Q235 and Q275, all these steel series belong to Chinese standard carbon structural steel, the listing below shows the difference of chemical composition and mechanical properties.
| Chemical composition % | ||||||
| Steel Series | Steel Grade | C (≤) | Si (≤) | Mn (≤) | P(≤) | S (≤) |
| Q195 | Q195 | 0.12 | 0:30 | 0.50 | 0.035 | 0.040 |
| Q215 Series | Q215A | 0.15 | 0.35 | 1.20 | 0.045 | 0.050 |
| Q215B | 0.15 | 0.35 | 1.20 | 0.045 | 0.045 | |
| Q235 Series | Q235A | 0.22 | 0.35 | 1.40 | 0.045 | 0.050 |
| Q235B | 0.20 | 0.35 | 1.40 | 0.045 | 0.045 | |
| Q235C | 0.17 | 0.35 | 1.40 | 0.040 | 0.040 | |
| Q235D | 0.17 | 0.35 | 1.40 | 0.035 | 0.035 | |
| Q275 Series | Q275A | 0.24 | 0.35 | 1.50 | 0.045 | 0.050 |
| Q275B | 0.21 | 0.35 | 1.50 | 0.045 | 0.045 | |
| Q275C | 0.20 | 0.35 | 1.50 | 0.040 | 0.040 | |
| Q275D | 0.20 | 0.35 | 1.50 | 0.035 | 0.035 | |
| Mechanical Properties (MPa) | ||
| Note | Yield strength | Tensile strength |
| Q195 | 195 | 315-430 |
| Q215 | 215 | 335-450 |
| Q235 | 235 | 370-500 |
| Q275 | 275 | 410-540 |
1 N/mm2 = 1 MPa
Tags: Q195 vs Q215, Q195 vs Q235, Q195 vs Q275
