HAYNES® 188 alloy is a cobalt-nickel-chromium-tungsten alloy that possesses excellent strength and corrosion resistance at elevated temperatures.
Chemical composition
| Composition |
USN R30188 |
| Carbon | 0.05 - 0.15 |
| Manganese | 1.25 max |
| Silicon | 0.20 - 0.50 |
| Chromium | 20.00 -24.00 |
| Tungsten | 13.00 - 16.00 |
| Iron | 3.00 max |
| Cobalt | Balance |
| Lanthanum | 0.03 - 0.15 |
| Nickel | 20.00 - 24.00 |
Physical properties
| Metric | English | |
| Density | 8.98 g/cm³ | 0.324 lbs/in³ |
| Modulus of Elasticity | 232 GPa | 33.7 Mpsi |
| Electrical Resistivity | 101.0 µohm*m | 39.6 µohm*in |
| Thermal Conductivity | 10.4 W/m*°K | 72 BTU*in/hr*ft²*°F |
| Coefficient of thermal expansion | 12.1 µm/(m*°C) | 6.7 µin/(in*°F) |
*Values calculated at 22 °C [72 °F]
Mechanical properties
| Cold worked % |
Yield strength |
Ultimate tensile strength |
Elongation |
| 0 | 938 MPa [136 ksi] | 1324 MPa [192 ksi] | 34 |
| 20 | 1110 MPa [161 ksi] | 1544 MPa [224 ksi] | 5.6 |
| 37 | 1641 MPa [238 ksi] | 2013 MPa [292 ksi] | 4.1 |
|
50 |
1813 MPa [263 ksi] | 2165 MPa [314 ksi] | 3.3 |
|
* Values are typical and may not represent all diameters. Test method will affect results. |
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