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Temper C (Full-Hard) K93500 Alloy

Full-hard K93500 alloy is K93500 alloy in the full-hard temper. It has the highest strength compared to the other variants of K93500 alloy. The graph bars on the material properties cards below compare full-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)

810 MPa 120 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

27 points

Strength to Weight: Bending

23 points

Thermal Shock Resistance

25 points

Alloy Composition

Iron (Fe)Fe 61.4 to 63
Nickel (Ni)Ni 32 to 32
Cobalt (Co)Co 5.0 to 5.0
Manganese (Mn)Mn 0 to 0.6
Silicon (Si)Si 0 to 0.25
Chromium (Cr)Cr 0 to 0.25
Aluminum (Al)Al 0 to 0.1
Titanium (Ti)Ti 0 to 0.1
Zirconium (Zr)Zr 0 to 0.1
Magnesium (Mg)Mg 0 to 0.1
Carbon (C)C 0 to 0.050
Phosphorus (P)P 0 to 0.015
Sulfur (S)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