Temper A (Annealed) K93500 Alloy
Annealed K93500 alloy is K93500 alloy in the annealed condition. It has the lowest strength compared to the other variants of K93500 alloy. The graph bars on the material properties cards below compare annealed 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
Brinell Hardness
160
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Poisson's Ratio
0.3
Rockwell B Hardness
73
Shear Modulus
72 GPa 10 x 106 psi
Tensile Strength: Ultimate (UTS)
490 MPa 72 x 103 psi
Tensile Strength: Yield (Proof)
290 MPa 42 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
Resilience: Unit (Modulus of Resilience)
220 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
17 points
Thermal Shock Resistance
15 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