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SAE-AISI H42 Steel vs. S21900 Stainless Steel

Both SAE-AISI H42 steel and S21900 stainless steel are iron alloys. They have 68% of their average alloy composition in common. 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 SAE-AISI H42 steel and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 700 to 1980
710

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1620
1400
Melting Onset (Solidus), °C 1570
1350
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 24
14
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 24
15
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.8
3.0
Embodied Energy, MJ/kg 130
43
Embodied Water, L/kg 98
160

Common Calculations

PREN (Pitting Resistance) 31
25
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 23 to 65
26
Strength to Weight: Bending, points 21 to 42
23
Thermal Diffusivity, mm2/s 6.5
3.8
Thermal Shock Resistance, points 20 to 57
15

Alloy Composition

Carbon (C), % 0.55 to 0.7
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
19 to 21.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 79.3 to 83.8
59.4 to 67.4
Manganese (Mn), % 0.15 to 0.4
8.0 to 10
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 0 to 0.3
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0