ASTM A276 Type 255
ASTM A276 Type 255 is a material grade specification for cold-finished or hot-finished bars in 255 stainless steel, available in form of rounds, square, hexagons and other hot rolled extruded shapes. Boltport uses 255 bar stock to ASTM A276 specifications for manufacturing stainless steel 255 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 255 stainless steel round bars, square bars, hexagon bars and other extruded shapes.
Chemical Composition
| Grade Symbol | UNS Number | Elements | Composition, % |
|---|---|---|---|
| Type 255 | S32550 | Carbon | 0.04 max |
| Manganese | 1.50 max | ||
| Phosphorus | 0.040 max | ||
| Sulfur | 0.030 max | ||
| Silicon | 1.0 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 |
|---|---|
| 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 |
Fasteners
-
Bolts -
Screws -
Studs -
Nuts -
Threaded Rods -
Pins -
Washers -
Components