A992 w shape beam w18x311 w18x283 wide flange
Core characteristics of A992 h shaped steel material
Chemical composition: Contains trace amounts of vanadium (V) and niobium (Nb), which improve strength and toughness, and fatigue resistance is better than A36/A572 steel grade; carbon content ≤0.23%, sulfur and phosphorus impurities are strictly controlled (S≤0.025%, P≤0.035%).
Mechanical properties: yield strength ≥345MPa (50ksi), tensile strength 470-630MPa, elongation ≥18%; strong seismic performance, meeting the design requirements of seismic loads.
Comparison of cross-sectional parameters and weight
| model | Weight (lbs/ft/kg/m) | Section Height (inches/mm) | Flange Width (inches/mm) | Web Thickness (inches/mm) |
|---|---|---|---|---|
| W18x311 structural h beam | 311 / 463 | 18 / 457 | 17.8 / 452 | 1.91 / 48.5 |
| W18x283 h beam | 283 / 421 | 18 / 457 | 16.5 / 419 | 1.76 / 44.7 |
Application of W18x283 W18x311 h beam profile
Super-long span bridges: Applicable to railway/highway bridge main beams, A992 material fatigue resistance meets ASTM A709 standard.
Super high-rise buildings: Used for core tube shear wall support and transfer layer trusses (W18x311 bending stiffness reaches 1.8×10⁶ kN·m²).
Heavy industrial facilities: Steel plant crane beams, port loading and unloading equipment brackets (need to be combined with hot-dip galvanizing anti-corrosion treatment).
Processing of W18x283 W18x311 h shaped beam
Welding requirements: GNEE will use low-hydrogen electrodes (such as E7018), preheating temperature ≥150℃, interlayer temperature ≤250℃, weld height ≥75% of web thickness to avoid unfused defects.
Anti-corrosion treatment: In open air environments, we recommend hot-dip galvanizing (zinc layer ≥ 85μm, life extended by 30%-50%).
Comparison with domestic and foreign standards
| American Standard Model | Similar to national standard model | Differences |
|---|---|---|
| W18x311 wide flange h beam | HW500×500×30×45 | The national standard weight is 12% higher, and the torsion resistance is better |
| W18x283 h beam wide flange | HN450×300×14×20 | The national standard flange is narrower and lightweight design |
