ASTM A276 / A276M UNS S32550
ASTM A276 UNS S32550 is a material grade specification for cold-finished or hot-finished bars in S32550 stainless steel, available in form of rounds, square, hexagons and other hot rolled extruded shapes. Ferrobend uses S32550 bar stock to ASTM A276 specifications for manufacturing stainless steel S32550 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 S32550 stainless steel round bars, square bars, hexagon bars and other extruded shapes.
Chemical Composition
| Identification Symbol | UNS Number | Elements | Composition % |
|---|---|---|---|
| 2550 | S32550 | Carbon | 0.04 max |
| Manganese | 1.50 max | ||
| Phosphorus | 0.040 max | ||
| Sulfur | 0.030 max | ||
| Silicon | 1.00 max | ||
| Chromium | 24.00 - 27.00 | ||
| Nickel | 4.5 - 6.5 | ||
| Molybdenum | 2.9 - 3.9 | ||
| Nitrogen | 0.10 - 0.25 | ||
| Copper | 1.50 - 2.50 |
Mechanical Properties
| Property | Value |
|---|---|
| Condition | A |
| Finish | Hot-Finished & Cold Finished |
| Tensile Strength, min, ksi [MPa] | 109 [750] |
| Yield Strength, min, ksi [MPa] | 80 [550] |
| Elongation in 2 in. [50mm] or 4D, min, % | 25 |
| Reduction or Area, min, % | -- |
| Brinell Hardness Number, HBW | 290 |
Mechanical Properties
| Property | Value |
|---|---|
| Condition | S |
| Finish | Cold Finished |
| Tensile Strength, min, ksi [MPa] | 125 [860] |
| Yield Strength, min, ksi [MPa] | 105 [720] |
| Elongation in 2 in. [50mm] or 4D, min, % | 16 |
| Reduction or Area, min, % | -- |
| Brinell Hardness Number, HBW | 335 |
