K93500 Alloy vs. ACI-ASTM CF8C Steel

Both K93500 alloy and ACI-ASTM CF8C steel are iron alloys. They have 73% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is K93500 alloy and the bottom bar is ACI-ASTM CF8C steel.

UNS K93500 Low Expansion Alloy ACI-ASTM CF8C (SCS21, J92710) Cast Stainless Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.3
Poisson's Ratio		0.28

Shear Modulus, GPa		72
Shear Modulus, GPa		77

Tensile Strength: Ultimate (UTS), MPa		490 to 810
Tensile Strength: Ultimate (UTS), MPa		530

Thermal Properties

Latent Heat of Fusion, J/g		270
Latent Heat of Fusion, J/g		300

Melting Completion (Liquidus), °C		1430
Melting Completion (Liquidus), °C		1420

Melting Onset (Solidus), °C		1380
Melting Onset (Solidus), °C		1430

Specific Heat Capacity, J/kg-K		460
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		17

Otherwise Unclassified Properties

Base Metal Price, % relative		30
Base Metal Price, % relative		19

Density, g/cm³		8.2
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		4.7
Embodied Carbon, kg CO₂/kg material		3.7

Embodied Energy, MJ/kg		65
Embodied Energy, MJ/kg		53

Embodied Water, L/kg		130
Embodied Water, L/kg		150

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		23
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		17 to 27
Strength to Weight: Axial, points		19

Strength to Weight: Bending, points		17 to 23
Strength to Weight: Bending, points		19

Thermal Shock Resistance, points		15 to 25
Thermal Shock Resistance, points		11

Alloy Composition

Aluminum (Al), %		0 to 0.1
Aluminum (Al), %		0

Carbon (C), %		0 to 0.050
Carbon (C), %		0 to 0.080

Chromium (Cr), %		0 to 0.25
Chromium (Cr), %		18 to 21

Cobalt (Co), %		5.0
Cobalt (Co), %		0

Iron (Fe), %		61.4 to 63
Iron (Fe), %		61.8 to 73

Magnesium (Mg), %		0 to 0.1
Magnesium (Mg), %		0

Manganese (Mn), %		0 to 0.6
Manganese (Mn), %		0 to 1.5

Molybdenum (Mo), %		0
Molybdenum (Mo), %		0 to 0.5

Nickel (Ni), %		32
Nickel (Ni), %		9.0 to 12

Niobium (Nb), %		0
Niobium (Nb), %		0 to 1.0

Phosphorus (P), %		0 to 0.015
Phosphorus (P), %		0 to 0.040

Silicon (Si), %		0 to 0.25
Silicon (Si), %		0 to 2.0

Sulfur (S), %		0 to 0.015
Sulfur (S), %		0 to 0.040

Titanium (Ti), %		0 to 0.1
Titanium (Ti), %		0

Zirconium (Zr), %		0 to 0.1
Zirconium (Zr), %		0