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K93050 Alloy vs. S21900 Stainless Steel

Both K93050 alloy and S21900 stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is K93050 alloy and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 72
78
Tensile Strength: Ultimate (UTS), MPa 500 to 680
710

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1430
1400
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 460
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 26
15
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 4.7
3.0
Embodied Energy, MJ/kg 65
43
Embodied Water, L/kg 120
160

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 17 to 23
26
Strength to Weight: Bending, points 17 to 21
23
Thermal Shock Resistance, points 16 to 21
15

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.080
Chromium (Cr), % 0 to 0.25
19 to 21.5
Cobalt (Co), % 0 to 0.5
0
Iron (Fe), % 61.4 to 63.9
59.4 to 67.4
Manganese (Mn), % 0 to 1.0
8.0 to 10
Nickel (Ni), % 36
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.020
0 to 0.045
Selenium (Se), % 0.15 to 0.3
0
Silicon (Si), % 0 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030