Ferritics Alloys 444
Physical Properties of 444 Alloys in the Annealed Condition at -20°F to +100°F
| Tensile Strength | Yield Strength | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | UNS Designation | Spec. | psi | MPa | ksi | psi | MPa | ksi | Elongation in 2 in. (min.) % | Grain Size Req. | Max. Hardness | Modulus of Elasticity (x106psi) | Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) | Thermal Conductivity (BTU-in/ ft2-h-°F) |
| 444 | S44400 | A268 | 60,000 | 415 | 60 | 40,000 | 275 | 40 | 12* | — | 100 Rb | — | 7.7 | 186 |
*for 0.049” average wall
Composition of 444 tubing and pipe
| Grade | 444 |
|---|---|
| UNS Designation | S44400 |
| Nickel (Ni) | 1.00 |
| Chromium (Cr) | 17.5–19.5 |
| Iron (Fe) | Bal. |
| Molybdenum (Mo) | 1.75–2.50 |
| Titanium (Ti) Max. | 0.20 + 4x (C + N) Min. to 0.80 Max. |
| Aluminum (Al) Max. | — |
| Cobalt (Co) Max. | — |
| Tungsten (W) | — |
| Vanadium (V) Max. | — |
| Copper (Cu) Max. | — |
| Manganese (Mn) Max. | 1.00 |
| Niobium (Nb) plus Tantalum | — |
| Carbon (C) Max. | 0.025 |
| Nitrogen (N) Max. | 0.035 |
| Silicon (Si) Max. | 1.00 |
| Sulphur (S) Max. | 0.030 |
| Phosphorous (P) Max. | 0.040 |
| Other Elements | — |
444 Product Range
| Alloy | UNS Designation | Werkstoff NR. | Specifications* |
|---|---|---|---|
| 444 | S44400 | N/A | A/SA268 |
*Note: The specifications noted including ASTM, ASME, or other applicable authorities are correct at the time of publication. Other specifications may apply for use of these materials in different applications.
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