Temper B (Half-Hard) K93500 Alloy
Half-hard K93500 alloy is K93500 alloy in the half-hard temper. The graph bars on the material properties cards below compare half-hard K93500 alloy to: low-expansion iron alloys (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Poisson's Ratio
0.3
Shear Modulus
72 GPa 10 x 106 psi
Tensile Strength: Ultimate (UTS)
680 MPa 98 x 103 psi
Thermal Properties
Latent Heat of Fusion
270 J/g
Melting Completion (Liquidus)
1430 °C 2600 °F
Melting Onset (Solidus)
1380 °C 2520 °F
Specific Heat Capacity
460 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
12 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
30 % relative
Density
8.2 g/cm3 510 lb/ft3
Embodied Carbon
4.7 kg CO2/kg material
Embodied Energy
65 MJ/kg 28 x 103 BTU/lb
Embodied Water
130 L/kg 16 gal/lb
Common Calculations
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
23 points
Strength to Weight: Bending
21 points
Thermal Shock Resistance
21 points
Alloy Composition
| Fe | 61.4 to 63 | |
| Ni | 32 to 32 | |
| Co | 5.0 to 5.0 | |
| Mn | 0 to 0.6 | |
| Si | 0 to 0.25 | |
| Cr | 0 to 0.25 | |
| Al | 0 to 0.1 | |
| Ti | 0 to 0.1 | |
| Zr | 0 to 0.1 | |
| Mg | 0 to 0.1 | |
| C | 0 to 0.050 | |
| P | 0 to 0.015 | |
| S | 0 to 0.015 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM F1684: Standard Specification for Iron-Nickel and Iron-Nickel-Cobalt Alloys for Low Thermal Expansion Applications
Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015