ASTM A276 UNS S44400
ASTM A276 UNS S44400 is a material grade specification for cold-finished or hot-finished bars in S44400 stainless steel, available in form of rounds, square, hexagons and other hot rolled extruded shapes. Ferrobend uses S44400 bar stock to ASTM A276 specifications for manufacturing stainless steel S44400 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 S44400 stainless steel round bars, square bars, hexagon bars and other extruded shapes.
Chemical Composition
| Identification Symbol | UNS Number | Elements | Composition % |
|---|---|---|---|
| 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 | ||
| Molybdenum | 1.75 - 2.50 | ||
| Nitrogen | 0.035 | ||
| Titanium + Columbium | 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 |
