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SAE-AISI H21 Steel vs. S24000 Stainless Steel

Both SAE-AISI H21 steel and S24000 stainless steel are iron alloys. They have 69% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H21 steel and the bottom bar is S24000 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 76
77
Tensile Strength: Ultimate (UTS), MPa 720 to 1790
770

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1630
1390
Melting Onset (Solidus), °C 1580
1350
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 11
17

Otherwise Unclassified Properties

Base Metal Price, % relative 23
12
Density, g/cm3 8.5
7.6
Embodied Carbon, kg CO2/kg material 4.5
2.7
Embodied Energy, MJ/kg 68
39
Embodied Water, L/kg 72
150

Common Calculations

PREN (Pitting Resistance) 19
23
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 23 to 58
28
Strength to Weight: Bending, points 21 to 38
24
Thermal Shock Resistance, points 24 to 59
16

Alloy Composition

Carbon (C), % 0.28 to 0.36
0 to 0.080
Chromium (Cr), % 3.0 to 3.8
17 to 19
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87.6 to 93.8
61.5 to 69
Manganese (Mn), % 0.15 to 0.4
11.5 to 14.5
Nickel (Ni), % 0 to 0.3
2.3 to 3.7
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0.15 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 8.5 to 10
0
Vanadium (V), % 0.3 to 0.6
0