ASTM A276 / A276M UNS S32750
ASTM A276 UNS S32750 is a material grade specification for cold-finished or hot-finished bars in S32750 stainless steel, available in form of rounds, square, hexagons and other hot rolled extruded shapes. Ferrobend uses S32750 bar stock to ASTM A276 specifications for manufacturing stainless steel S32750 bolts, nuts, screws, studs, threaded rods, other fasteners and bar stock components for general engineering purposes.
ASTM A276 specification covers requirements such as chemical composition, mechanical properties, heat treatment and other supplementary requirements for S32750 stainless steel round bars, square bars, hexagon bars and other extruded shapes.
Chemical Composition
| Identification Symbol | UNS Number | Elements | Composition % |
|---|---|---|---|
| 2550 | S32750 | Carbon | 0.030 max |
| Manganese | 1.20 max | ||
| Phosphorus | 0.035 max | ||
| Sulfur | 0.020 max | ||
| Silicon | 0.80 max | ||
| Chromium | 24.00 - 26.00 | ||
| Nickel | 6.00 - 8.00 | ||
| Molybdenum | 3.00 - 5.00 | ||
| Nitrogen | 0.24 - 0.32 | ||
| Copper | 0.50 max |
Mechanical Properties
| Property | Value | |
|---|---|---|
| Finish | Hot-Finished & Cold Finished | |
| Diameter or Thickness,in. (mm) | up to 2 (50.8) incl | over 2 (50.8) |
| Tensile Strength, min, ksi [MPa] | 116 [800] | 110 [760] |
| Yield Strength, min, ksi [MPa] | 80 [550] | 75 [515] |
| Elongation in 2 in. [50mm] or 4D, min, % | 15 | 15 |
| Reduction or Area, min, % | -- | -- |
| Brinell Hardness Number, HBW | 310 | 310 |
