Q355 Steel Structure H Beam
Q355 structural steel H beam is a low-alloy high-strength steel used for welded structures that can withstand stress and heavy loads. Q represents the yield point, while the number 355 represents the yield strength. It also replaces the Q345.
Q355 H-shaped steel is a structural steel with a yield strength of 345 MPa and a tensile strength of 450 MPa. It can be used to manufacture and produce various high-load structural parts such as petroleum storage tanks, high-pressure vessels, boilers, ships, and power stations. Q355 also has a protective layer against rust.
Q355 h metal beam chemical composition
| Component Elements Properties | Metric | US/Imperial |
| Carbon, C | <= 0.23 % | <= 0.23 % |
| Iron, Fe | 98 % | 98 % |
| Manganese, Mn | 1.35 % | 1.35 % |
| Phosphorus, P | <= 0.040 % | <= 0.040 % |
| Silicon, Si | <= 0.40 % | <= 0.40 % |
| Sulfur, S | <= 0.050 % | <= 0.050 % |
| Silicon, Si | 0.15 – 0.40 % | 0.15 – 0.40 % |
| Sulfur, S | 0.050 % | 0.050 % |
q355 h beam steel structure Mechanical property
| Mechanical Properties | Metric | US/Imperial |
| Hardness, Brinell | 135 | 135 |
| Hardness, Rockwell B | 74 | 74 |
| Tensile Strength, Ultimate | 450 MPa | – |
| Tensile Strength, Yield | 345 MPa | – |
| Elongation at Break | 18 % | 18 % |
| 21 % | 21 % | |
| Bulk Modulus | 160 GPa | 23200 ksi |
| Shear Modulus | 80.0 GPa | 11600 ksi |
q355 h section steel beams physical properties
| Physical Properties | Metric | US/Imperial |
| Density | 7.80 g/cc | 0.282 lb/in³ |
Q355 steel product details
Q355 steel is a new Chinese steel type, low-alloy high-strength structural steel that replaces Q345, with a material density of 7.85 g/cm3. According to GB/T 1591-2018, Q355 has 3 quality levels: Q355B, Q355C and Q355D. "Q" is the first letter of Chinese Pinyin: "yield point", which means yield strength. "355" is the abbreviation of 355 MPa. The parameters are tested with 16mm diameter steel bars or steel plates. The tensile strength is 470-630 MPa. Pa.
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