K93050 Alloy vs. S17400 Stainless Steel

Both K93050 alloy and S17400 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is K93050 alloy and the bottom bar is S17400 stainless steel.

UNS K93050 Low Expansion Alloy UNS S17400 (17-4 PH, Alloy 630) Stainless 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		0.28

Shear Modulus, GPa		72
Shear Modulus, GPa		75

Tensile Strength: Ultimate (UTS), MPa		500 to 680
Tensile Strength: Ultimate (UTS), MPa		910 to 1390

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		11

Otherwise Unclassified Properties

Base Metal Price, % relative		26
Base Metal Price, % relative		14

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

Embodied Carbon, kg CO₂/kg material		4.7
Embodied Carbon, kg CO₂/kg material		2.7

Embodied Energy, MJ/kg		65
Embodied Energy, MJ/kg		39

Embodied Water, L/kg		120
Embodied Water, L/kg		130

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 23
Strength to Weight: Axial, points		32 to 49

Strength to Weight: Bending, points		17 to 21
Strength to Weight: Bending, points		27 to 35

Thermal Shock Resistance, points		16 to 21
Thermal Shock Resistance, points		30 to 46

Alloy Composition

Carbon (C), %		0 to 0.15
Carbon (C), %		0 to 0.070

Chromium (Cr), %		0 to 0.25
Chromium (Cr), %		15 to 17

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

Copper (Cu), %		0
Copper (Cu), %		3.0 to 5.0

Iron (Fe), %		61.4 to 63.9
Iron (Fe), %		70.4 to 78.9

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

Nickel (Ni), %		36
Nickel (Ni), %		3.0 to 5.0

Niobium (Nb), %		0
Niobium (Nb), %		0.15 to 0.45

Phosphorus (P), %		0 to 0.020
Phosphorus (P), %		0 to 0.040

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

Silicon (Si), %		0 to 0.35
Silicon (Si), %		0 to 1.0

Sulfur (S), %		0 to 0.020
Sulfur (S), %		0 to 0.030