Physical Properties of Super Austenitic 800/800H/800HT 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 (x106 psi) |
Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) |
Thermal Conductivity (BTU-in/ ft2-h-°F) |
| 800 |
N08800 |
B514, B515 |
75,000 |
520 |
75 |
30,000 |
205 |
30 |
30 |
— |
— |
— |
7.9 |
80 |
| 800H |
N08810 |
B514, B515 |
65,000 |
450 |
65 |
25,000 |
170 |
25 |
30 |
5 & coarser |
— |
— |
7.9 |
80 |
| 800HT |
N08811 |
B514, B515 |
65,000 |
450 |
65 |
25,000 |
170 |
25 |
30 |
5 & coarser |
— |
— |
7.9 |
80 |
Composition of Super Austenitic 800/800H/800HT tubing and pipe
| Grade |
800 |
800H |
800HT |
| UNS Designation |
N08800 |
N08810 |
N08811 |
| Nickel (Ni) |
30.0–35.0 |
30.0–35.0 |
30.0– 35.0 |
| Chromium (Cr) |
19.0–23.0 |
19.0–23.0 |
19.0–23.0 |
| Iron (Fe) |
39.5 Min. |
39.5 Min. |
39.5 Min. |
| Molybdenum (Mo) |
— |
— |
— |
| Titanium (Ti) Max. |
0.15–0.60 |
0.15–0.60 |
0.15–0.60* |
| Aluminum (Al) Max. |
0.15–0.60 |
0.15–0.60 |
0.15–0.60 |
| Cobalt (Co) Max. |
— |
— |
— |
| Tungsten (W) |
— |
— |
— |
| Vanadium (V) Max. |
— |
— |
— |
| Copper (Cu) Max. |
0.75 |
0.75 |
0.75 |
| Manganese (Mn) Max. |
1.5 |
1.5 |
1.5 |
| Niobium (Nb) plus Tantalum |
— |
— |
— |
| Carbon (C) Max. |
0.10 |
0.05–0.10 |
0.06–0.10 |
| Nitrogen (N) Max. |
— |
— |
— |
| Silicon (Si) Max. |
1.00 |
1.00 |
100 |
| Sulphur (S) Max. |
0.015 |
0.015 |
0.1015 |
| Phosphorous (P) Max. |
— |
— |
— |
| Other Elements |
— |
— |
— |
Super Austenitic 800/800H/800HT Product Range
| Alloy |
UNS Designation |
Werkstoff NR. |
Specifications* |
| 800 |
N08800 |
1.4876 |
B/SB515, B/SB514 |
| 800H |
N08810 |
1.4876 |
B/SB515, B/SB514 |
| 800HT |
N08811 |
1.4876 |
B/SB515, B/SB514 |
*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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