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S21904 Stainless Steel vs. K94200 Alloy

Both S21904 stainless steel and K94200 alloy are iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is K94200 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
140
Elongation at Break, % 17 to 51
5.0 to 32
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 78
54
Shear Strength, MPa 510 to 620
330 to 410
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
500 to 710
Tensile Strength: Yield (Proof), MPa 390 to 910
270 to 650

Thermal Properties

Melting Onset (Solidus), °C 1350
1440
Specific Heat Capacity, J/kg-K 480
500
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 17
5.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
3.0

Otherwise Unclassified Properties

Density, g/cm3 7.7
8.2

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
35 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
250 to 1460
Stiffness to Weight: Axial, points 14
9.8
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 25 to 36
17 to 24
Strength to Weight: Bending, points 23 to 29
17 to 22
Thermal Diffusivity, mm2/s 3.8
3.7
Thermal Shock Resistance, points 15 to 21
49 to 70

Comparable Variants