ASTM A276 UNS S44004
ASTM A276 UNS S44004 is a material grade specification for cold-finished or hot-finished bars in S44004 stainless steel, available in form of rounds, square, hexagons and other hot rolled extruded shapes. Boltport uses S44004 bar stock to ASTM A276 specifications for manufacturing stainless steel S44004 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 S44004 stainless steel round bars, square bars, hexagon bars and other extruded shapes.
Chemical Composition
| Identification Symbol | UNS Number | Grade | Elements | Composition % |
|---|---|---|---|---|
| 440C | S44004 | 21 chromium, 26 nickel, 4.5 molybdenum |
Carbon | 0.02 max |
| Manganese | 2.00 max | |||
| Phosphorus | 0.045 max | |||
| Sulfur | 0.035 max | |||
| Silicon | 1.00 max | |||
| Nickel | 23.00 - 28.00 | |||
| Chromium | 19.00 - 23.00 | |||
| Molybdenum | 4.00 - 5.00 | |||
| Copper | 1.00 - 2.00 | |||
| Nitrogen | 0.10 max |
Mechanical Properties
| Property | Value |
|---|---|
| Finish | Hot-Finished & Cold Finished |
| Tensile Strength, min, ksi [MPa] | 71 [490] |
| Yield Strength, min, ksi [MPa] | 31 [215] |
| Elongation in 2 in. [50mm] or 4D, min, % | 35 |
| Reduction or Area, min, % | -- |
| Brinell Hardness Number, HBW | -- |
Fasteners
-
Bolts -
Screws -
Studs -
Nuts -
Threaded Rods -
Pins -
Washers -
Components