K93050 Alloy vs. SAE-AISI 4340M Steel

Both K93050 alloy and SAE-AISI 4340M steel are iron alloys. They have 65% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is K93050 alloy and the bottom bar is SAE-AISI 4340M steel.

UNS K93050 Low Expansion Alloy SAE-AISI 4340M (300M, K44220) Silicon-Vanadium Steel

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.3
Poisson's Ratio		0.29

Shear Modulus, GPa		72
Shear Modulus, GPa		72

Tensile Strength: Ultimate (UTS), MPa		500 to 680
Tensile Strength: Ultimate (UTS), MPa		2340

Thermal Properties

Latent Heat of Fusion, J/g		270
Latent Heat of Fusion, J/g		280

Melting Completion (Liquidus), °C		1430
Melting Completion (Liquidus), °C		1440

Melting Onset (Solidus), °C		1380
Melting Onset (Solidus), °C		1400

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		13

Otherwise Unclassified Properties

Base Metal Price, % relative		26
Base Metal Price, % relative		3.9

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

Embodied Carbon, kg CO₂/kg material		4.7
Embodied Carbon, kg CO₂/kg material		1.9

Embodied Energy, MJ/kg		65
Embodied Energy, MJ/kg		26

Embodied Water, L/kg		120
Embodied Water, L/kg		55

Common Calculations

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

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

Strength to Weight: Axial, points		17 to 23
Strength to Weight: Axial, points		84

Strength to Weight: Bending, points		17 to 21
Strength to Weight: Bending, points		51

Thermal Shock Resistance, points		16 to 21
Thermal Shock Resistance, points		70

Alloy Composition

Carbon (C), %		0 to 0.15
Carbon (C), %		0.38 to 0.43

Chromium (Cr), %		0 to 0.25
Chromium (Cr), %		0.7 to 1.0

Cobalt (Co), %		0 to 0.5
Cobalt (Co), %		0

Iron (Fe), %		61.4 to 63.9
Iron (Fe), %		93.3 to 94.8

Manganese (Mn), %		0 to 1.0
Manganese (Mn), %		0.65 to 0.9

Molybdenum (Mo), %		0
Molybdenum (Mo), %		0.35 to 0.45

Nickel (Ni), %		36
Nickel (Ni), %		1.7 to 2.0

Phosphorus (P), %		0 to 0.020
Phosphorus (P), %		0 to 0.012

Selenium (Se), %		0.15 to 0.3
Selenium (Se), %		0

Silicon (Si), %		0 to 0.35
Silicon (Si), %		1.5 to 1.8

Sulfur (S), %		0 to 0.020
Sulfur (S), %		0 to 0.012

Vanadium (V), %		0
Vanadium (V), %		0.050 to 0.1