W21x50 W21x55 W21x57 h beam profile steel
Specifications comparison
| model | Height (inches/mm) | Wing width (inch/mm) | Belly thickness (mm) | Wing thickness (mm) | Theoretical weight (kg/m) | Section modulus Sx (cm³) |
|---|---|---|---|---|---|---|
| W21x50 | 21/533 | ~8.25/210 | ≥10 | ≥18 | 74 | ~1200 |
| W21x55 | 21/533 | ~8.25/210 | ≥12 | ≥20 | 82 | ~1400 |
| W21x57 | 21/533 | ~8.25/210 | ≥12 | ≥22 | 85 | ~1500 |
Performance characteristics of h section steel
High strength and light weight: The tensile strength range is 470-630MPa (A992 material), and the strength-to-weight ratio is better than that of ordinary carbon steel (such as A36), which can reduce the material consumption by 15%-20%.
Due to the thicker flanges and webs, the bending capacity (Sx) of W21x55 and W21x57 is 16% and 25% higher than that of W21x50, respectively, and is suitable for higher load scenarios.
Corrosion resistance: The normalizing process (580-620℃) refines the grains and forms a dense structure, and the corrosion resistance to salt spray and humid environment is better than that of traditional carbon steel.
Processing adaptability: It supports flame/plasma cutting, cold bending and welding (E70/E80 welding rods are recommended), and it needs to be preheated to 120-150℃ before welding (plate thickness ≥25mm). Dynamic bearing capacity: Low temperature impact toughness (≥27J at -40℃) and elongation (≥18%) meet the high vibration requirements of bridges, heavy machinery, etc..
Application areas of steel h beam
W21x50 h shaped steel: Medium load scenarios (such as secondary beams of industrial plants, light equipment brackets), focusing on economy and fast construction.
W21x55 h beam structure: Core tube support columns of high-rise buildings, main beams of medium-sized bridges, balancing strength and cost.
W21x57 h section beam: Large span structures (such as roof trusses of exhibition centers), heavy machinery frames, need to withstand high impact loads.
