CARBON STEEL H PROFILE Q195 Q345 is Chinese steel grade of carbon structural steel, “Q” stands for Yield Strength, “195” means the Yield Strength is 195 Mpa, and Tensile Strength is 315 – 430 Mpa, data is tested based on a 16mm diameter steel bar. Q195 material density is 7.85 g/cm3, the physical properties and chemical composition are equivalent to ASTM – Gr.B(σs185), Gr.C(σs205); DIN – St33, S185; JIS – SS330(σs205), SPHC(σs205), SPHD(σs205); BS – 040A10, S185(σS185MPa).
CARBON STEEL H PROFILE Q195 Q345 Introduction:
| Physical Properties | |
| Density, g/cm3 (lb/in3) | 7.85 (0.284) |
| Melting point, °C (°F) | 1450-1530 (2640-2800) |
| Specific heat capacity, J/(Kg·K) | 470 at 20 °C (68 °F) |
| Electrical resistivity, μΩ·m | about 0.15 (20 °C) |
| Elastic modulus, GPa (ksi) | 200 (29 x 103) |
| Thermal conductivity, (W/m·K) | 53-49 (0-100 °C) |
| Coefficient of thermal expansion, (10-6/K) | 11.3-11.6 at 20-100 °C (68-212 °F) |
| Young’s modulus, GPa (ksi) | 200 (29 x 103) |
| Poisson’s ratio | 0.24-0.28 |
CARBON STEEL H PROFILE Q195 Q345 is a plain carbon structural steel which is widely used in China. Q235 material in Chinese standard GB/T 700 is divided into 4 quality grades: Q235A, Q235B, Q235C and Q235D; Density of this steel is 7.85 g/cm3 (0.284 lb/in3), tensile strength is 370-500 MPa (54-73 ksi); yield strength is 235 MPa (34 ksi) for steel bar diameter or plate thickness ≤ 16mm.
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