ASTM A276 / A276M UNS S31803
ASTM A276 UNS S31803 is a material grade specification for cold-finished or hot-finished bars in S31803 stainless steel, available in form of rounds, square, hexagons and other hot rolled extruded shapes. Ferrobend uses S31803 bar stock to ASTM A276 specifications for manufacturing stainless steel S31803 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 S31803 stainless steel round bars, square bars, hexagon bars and other extruded shapes.
Chemical Composition
| Identification Symbol | UNS Number | Elements | Composition % |
|---|---|---|---|
| 2205 | S31803 | Carbon | 0.030 max |
| Manganese | 2.00 max | ||
| Phosphorus | 0.030 max | ||
| Sulfur | 0.020 max | ||
| Silicon | 1.00 max | ||
| Chromium | 21.00 - 23.00 | ||
| Nickel | 4.5 - 6.5 | ||
| Molybdenum | 2.5 - 3.5 | ||
| Nitrogen | 0.08 - 0.20 |
Mechanical Properties
| Property | Value |
|---|---|
| Finish | Hot-Finished & Cold Finished |
| Tensile Strength, min, ksi [MPa] | 90 [620] |
| Yield Strength, min, ksi [MPa] | 65 [448] |
| Elongation in 2 in. [50mm] or 4D, min, % | 25 |
| Reduction or Area, min, % | -- |
| Brinell Hardness Number, HBW | 290 |
