Physical Properties of Super Austenitic 904L 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) |
904L |
N08904 |
A249, A312 |
71,000 |
490 |
71 |
31,000 |
215 |
31 |
35 |
— |
90 Rb |
28.0 |
8.5 |
79 |
904L |
N08904 |
B673, B674 |
71,000 |
490 |
71 |
31,000 |
215 |
31 |
35 |
— |
— |
— |
8.5 |
79 |
Composition of Super Austenitic 904L tubing and pipe
Grade |
904L |
UNS Designation |
N08904 |
Nickel (Ni) |
23.0 – 28.0 |
Chromium (Cr) |
19.0 – 23.0 |
Iron (Fe) |
Bal. |
Molybdenum (Mo) |
4.0 – 5.0 |
Titanium (Ti) Max. |
— |
Aluminum (Al) Max. |
— |
Cobalt (Co) Max. |
— |
Tungsten (W) |
— |
Vanadium (V) Max. |
— |
Copper (Cu) Max. |
1.00 – 2.00 |
Manganese (Mn) Max. |
2.00 |
Niobium (Nb) plus Tantalum |
— |
Carbon (C) Max. |
0.020 |
Nitrogen (N) Max. |
0.10 |
Silicon (Si) Max. |
1.00 |
Sulphur (S) Max. |
0.035 |
Phosphorous (P) Max. |
0.045 |
Other Elements |
— |
Super Austenitic 904L Product Range
Alloy |
UNS Designation |
Werkstoff NR. |
Specifications* |
904L |
N08904 |
1.4539 |
A269, A/SA249, B/SB674, A/SA312, B/SB673
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Product Image
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