Physical Properties of AL 29-4C 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 Desig-nation |
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) |
| AL 29-4C |
S44735 |
A268 |
75,000 |
515 |
75 |
60,000 |
415 |
60 |
10* |
— |
100 Rb |
28.0 |
5.2 |
119 |
*for 0.049” average wall
Composition of AL 29-4C tubing and pipe
| Grade |
AL 29-4C |
| UNS Designation |
S44735 |
| Nickel (Ni) |
1.00 |
| Chromium (Cr) |
28.00–30.00 |
| Iron (Fe) |
Bal. |
| Molybdenum (Mo) |
3.60–4.20 |
| Titanium (Ti) 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. |
0.030 |
| Nitrogen (N) Max. |
0.045 |
| Silicon (Si) Max. |
1.00 |
| Sulphur (S) Max. |
0.030 |
| Phosphorous (P) Max. |
0.040 |
| Other Elements |
— |
**(Ti + Cb) 0.20 - 1.00, & 6 (C + N) min
AL 29-4C Product Range
| Alloy |
UNS Designation |
Werkstoff NR. |
Specifications* |
| AL 29-4C |
S44735 |
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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