ASTM A276 Type 444
ASTM A276 Type 444 is a material grade specification for cold-finished or hot-finished bars in 444 stainless steel, available in form of rounds, square, hexagons and other hot rolled extruded shapes. Boltport uses 444 bar stock to ASTM A276 specifications for manufacturing stainless steel 444 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 444 stainless steel round bars, square bars, hexagon bars and other extruded shapes.
Chemical Composition
| Grade Symbol | UNS Number | Elements | Composition, % |
|---|---|---|---|
| Type 444 | S44400 | Carbon | 0.025 max |
| Manganese | 1.00 max | ||
| Phosphorus | 0.040 max | ||
| Sulfur | 0.030 max | ||
| Silicon | 1.00 max | ||
| Chromium | 17.5 - 19.5 | ||
| Nickel | 1.00 max | ||
| Molybdenum | 1.75 - 2.50 | ||
| Nitrogen | 0.035 max | ||
| Titanium+Columbiun | 0.20+4 ×(C+N)-0.80 |
Mechanical Properties
| Property | Value | |
|---|---|---|
| Finish | Hot-Finished | Cold Finished |
| Tensile Strength, min, ksi [MPa] | 60 [415] | 60 [415] |
| Yield Strength, min, ksi [MPa] | 45 [310] | 45 [310] |
| Elongation in 2 in. [50mm] or 4D, min, % | 20 | 16 |
| Reduction or Area, min, % | 45 | 45 |
| Brinell Hardness Number, HBW | 217 | 217 |
Fasteners
-
Bolts -
Screws -
Studs -
Nuts -
Threaded Rods -
Pins -
Washers -
Components