Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of q195, q215, q235 & q275 steel in China. Welcome to wholesale customized q195, q215, q235 & q275 steel at low price from our factory. If you have any enquiry about free sample and cheap products, please feel free to email us.
Chinese standard carbon structural steel
Here we show the difference between Q195 vs Q215, Q235 & Q275, these steel series all belong to Chinese standard carbon structural steel, the listing below shows the difference of chemical composition and mechanical properties.
Q195, Q215, Q235 and Q275 steels are all national standard carbon structural steels.
Q195: Low strength, good plasticity, toughness and processing performance, as well as good welding performance. Mainly used for rolling thin plates and wire rods.
Q215: Mainly used for making pipe billets and bolts.
Q235: Has moderate strength and good load-bearing capacity, as well as good plasticity and toughness, as well as good weldability and processability. This is a commonly used grade for steel structures.
Q275: High strength and hardness, good wear resistance, but poor plasticity, impact toughness and weldability.
- Chinese Standard Carbon Structural Steel Specification
| Chemical Composition | ||||||
| Steel Series | Steel Grade | C % (≤) | Si % (≤) | Mn (≤) | P (≤) | S (≤) |
| Q195 | Q195 | 0.12 | 0.3 | 0.5 | 0.035 | 0.04 |
| Q215 Series | Q215A | 0.15 | 0.35 | 1.2 | 0.045 | 0.05 |
| Q215B | 0.15 | 0.35 | 1.2 | 0.045 | 0.045 | |
| Q235 Series | Q235A | 0.22 | 0.35 | 1.4 | 0.045 | 0.05 |
| Q235B | 0.2 | 0.35 | 1.4 | 0.045 | 0.045 | |
| Q235C | 0.17 | 0.35 | 1.4 | 0.04 | 0.04 | |
| Q235D | 0.17 | 0.35 | 1.4 | 0.035 | 0.035 | |
| Q275 Series | Q275A | 0.24 | 0.35 | 1.5 | 0.045 | 0.05 |
| Q275B | 0.21 | 0.35 | 1.5 | 0.045 | 0.045 | |
| Q275C | 0.2 | 0.35 | 1.5 | 0.04 | 0.04 | |
| Q275D | 0.2 | 0.35 | 1.5 | 0.035 | 0.035 | |
| Mechanical Properties (N/mm2 = Mpa) | ||
| Grade | Yield Strength | Tensile Strength |
| Q195 | 195 | 315-430 |
| Q215 | 215 | 335-450 |
| Q235 | 235 | 370-500 |
| Q275 | 275 | 410-540 |
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