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SAE-AISI H21 Steel vs. S30600 Stainless Steel

Both SAE-AISI H21 steel and S30600 stainless steel are iron alloys. They have 66% 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 H21 steel and the bottom bar is S30600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 720 to 1790
610

Thermal Properties

Latent Heat of Fusion, J/g 250
350
Melting Completion (Liquidus), °C 1630
1380
Melting Onset (Solidus), °C 1580
1330
Specific Heat Capacity, J/kg-K 440
490
Thermal Conductivity, W/m-K 27
14
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 23
19
Density, g/cm3 8.5
7.6
Embodied Carbon, kg CO2/kg material 4.5
3.6
Embodied Energy, MJ/kg 68
51
Embodied Water, L/kg 72
150

Common Calculations

PREN (Pitting Resistance) 19
18
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 23 to 58
22
Strength to Weight: Bending, points 21 to 38
21
Thermal Diffusivity, mm2/s 7.1
3.7
Thermal Shock Resistance, points 24 to 59
14

Alloy Composition

Carbon (C), % 0.28 to 0.36
0 to 0.018
Chromium (Cr), % 3.0 to 3.8
17 to 18.5
Copper (Cu), % 0 to 0.25
0 to 0.5
Iron (Fe), % 87.6 to 93.8
58.9 to 65.3
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 0 to 0.3
14 to 15.5
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.15 to 0.5
3.7 to 4.3
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 8.5 to 10
0
Vanadium (V), % 0.3 to 0.6
0