ASTM A276 Type 431 Fasteners
ASTM A276 Type 431 is a material grade specification for cold-finished or hot-finished bars in 431 stainless steel, available in form of rounds, square, hexagons and other hot rolled extruded shapes. Boltport uses 431 bar stock to ASTM A276 specifications for manufacturing stainless steel 431 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 431 stainless steel round bars, square bars, hexagon bars and other extruded shapes.
Chemical Composition
| Grade Symbol | UNS Number | Elements | Composition, % |
|---|---|---|---|
| Type 431 | S43100 | Carbon | 0.20 max |
| Manganese | 1.00 max | ||
| Phosphorus | 0.040 max | ||
| Sulfur | 0.030 max | ||
| Silicon | 1.00 max | ||
| Chromium | 15.00 - 17.00 | ||
| Nickel | 1.25 - 2.50 |
Mechanical Properties
| Property | Value |
|---|---|
| Finish | Hot-Finished & Cold Finished |
| Tensile Strength, min, ksi [MPa] | .... |
| Yield Strength, min, ksi [MPa] | .... |
| Elongation in 2 in. [50mm] or 4D, min, % | .... |
| Reduction or Area, min, % | .... |
| Brinell Hardness Number, HBW | 285 |
Fasteners
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Bolts -
Screws -
Studs -
Nuts -
Threaded Rods -
Pins -
Washers -
Components