ASTM A992 — Yield Strength, Tensile Strength and Applications
The default spec for wide-flange (W) and, by extension, WT shapes cut from them. Introduced in 1998 to standardize W-shape properties with a capped yield and a controlled yield-to-tensile ratio for predictable ductility and weldability.
Strength
| Grade | Fy (ksi) | Fu (ksi) | Note |
|---|---|---|---|
| — | 50 | 65 | Fy 50 ksi min, 65 ksi max; Fu 65 ksi min; Fy/Fu ≤ 0.85. |
Fy and Fu are specification minimums. Verify the grade on the Mill Test Report (MTR); dual-certified material is common.
Applicable members
W (preferred), WT (preferred), HP, L, C, MC, M, S, MT, ST
Preferred specification for: W-Shape (Wide Flange), WT (Tee cut from W).
Applicable is not the same as stocked. Confirm availability with the supplier.
Common applications
Building framing beams and columns, the standard for W-shape construction.
Field notes
- Fy is capped at 65 ksi and Fy/Fu ≤ 0.85, which gives predictable inelastic behavior; A992 is the usual W-shape material in seismic systems.
- For HP the American Institute of Steel Construction (AISC) preferred spec is A572 Grade 50; A992 is widely dual-certified with it.
- Not weathering. Specify coatings separately for exposed or Architecturally Exposed Structural Steel (AESS) work.
Material constants
- Modulus of elasticity E: 29,000 ksi
- Shear modulus G: 11,200 ksi
- Density: 490 lb/ft³ (0.284 lb/in³)
- Poisson's ratio: 0.30
- Thermal expansion: 6.5 × 10⁻⁶ in/in/°F
These are the same for every structural steel grade. Strength changes with the specification; stiffness does not.
Related
- ASTM Structural Steel Grades Reference
chemistry, tolerances and the full specification behind this grade
- Steel Shape Properties Table
the sections this grade is supplied in
- Bolt Tensile & Shear Capacity Calculator
fastener grades to match this base metal
- Fillet Weld Strength Calculator
electrode selection to match this base metal
- A36 vs A572 Grade 50 vs A992
side by side, with Fy and Fu
- A36 vs A992
side by side, with Fy and Fu
- A572 Grade 50 vs A992
side by side, with Fy and Fu
The full specification
Chemistry, tolerances, coatings, galvanizing, weldability, availability and substitutions for every spec: ASTM 101 (STL+).