Physical Properties of 254 Alloys in the Annealed Condition at -20°F to +100°F
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Tensile Strength |
Yield Strength |
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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) |
254 |
S31254 |
A249, A312 |
98,000 |
675 |
98 |
45,000 |
310 |
45 |
40 |
— |
96 Rb |
28.0 |
8.5 |
90 |
Composition of 254 tubing and pipe
Grade |
254 |
UNS Designation |
S32154 |
Nickel (Ni) |
17.5–18.5 |
Chromium (Cr) |
19.5–20.5 |
Iron (Fe) |
Bal. |
Molybdenum (Mo) |
6.0–6.5 |
Titanium (Ti) Max. |
— |
Aluminum (Al) Max. |
— |
Cobalt (Co) Max. |
— |
Tungsten (W) |
— |
Vanadium (V) Max. |
— |
Copper (Cu) Max. |
0.50–1.00 |
Manganese (Mn) Max. |
1.00 |
Niobium (Nb) plus Tantalum |
— |
Carbon (C) Max. |
0.020 |
Nitrogen (N) Max. |
0.18–0.25 |
Silicon (Si) Max. |
0.80 |
Sulphur (S) Max. |
0.010 |
Phosphorous (P) Max. |
0.030 |
Other Elements |
— |
254 Product Range
Alloy |
UNS Designation |
Werkstoff NR. |
Specifications* |
254 |
S31254 |
1.4547 |
A/SA249, A269, A270, A/SA312
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Product Image
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