Gnee Steel (Tianjin) Co., Ltd. is one of the most professional wide flange h beam w21x68 w21x73 a36 manufacturers and suppliers in China, also supports customized service. If you're going to buy wide flange h beam w21x68 w21x73 a36 made in China, welcome to get free sample from our factory. Quality products and low price are available.
wide flange h beam W21x68 W21x73 A36
A36 h section steel material characteristics
Chemical composition: Carbon (C) ≤ 0.25%, Silicon (Si) ≤ 0.40%, Manganese (Mn) 0.80%-1.20%, Phosphorus (P) ≤ 0.04%, Sulfur (S) ≤ 0.05%24.
Mechanical properties: Yield strength ≥ 250MPa, tensile strength 400-550MPa, elongation after fracture ≥ 20%25. Medium-strength steel, suitable for static and dynamic load structures.
Processing performance: Supports hot cutting, cold bending and mechanical processing (turning, milling, drilling, etc.), welding is not easy to produce cracks or pores.
W21x68/W21x73 h beam wide flange general parameters
Model definition: W21 means the nominal height is 21 inches (about 533mm), and the number after x represents the unit length weight (pounds/foot): W21x68 steel wide flange beam is 68 pounds/foot (about 101.2kg/m), and W21x73 wide flange h beam is 73 pounds/foot (about 108.6kg/m).
Flange width: Usually 8-10 inches (203-254mm) level.
Web thickness: Depending on the model, about 0.4-0.7 inches (10-18mm).
Sectional moment of inertia: The moment of inertia of W21x73 wf steel beam is higher than that of W21x68 h beam wide flange, and it has stronger bending resistance.
Application areas of W21x68/W21x73 w shape structural steel
Building structure: used for high-rise building frames, industrial plant beams and supporting components.
Bridge engineering: suitable for main beams or pier connectors of small and medium span bridges.
Machinery manufacturing: as a heavy equipment base or crane component, using its high load-bearing capacity.
Ships and vehicles: used for hull frames or frame components, relying on its impact resistance.
Selection considerations
Load matching: W21x73 w wide flange beam has a higher unit weight and is suitable for larger spans or heavy loads; W21x68 focuses more on lightweight and economy.
Corrosion resistance: A36 material needs to be painted or galvanized to improve durability in outdoor environments.
Specification requirements: It must comply with ASTM A36 (material) and ASTM A6 (rolled steel) standards.
