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SAE-AISI H14 Steel vs. S21640 Stainless Steel

Both SAE-AISI H14 steel and S21640 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H14 steel and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 710 to 2030
740

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1530
1430
Melting Onset (Solidus), °C 1490
1380
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 35
15
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 15
17
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 2.7
3.6
Embodied Energy, MJ/kg 39
51
Embodied Water, L/kg 73
150

Common Calculations

PREN (Pitting Resistance) 13
26
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 69
27
Strength to Weight: Bending, points 22 to 44
23
Thermal Diffusivity, mm2/s 9.3
4.0
Thermal Shock Resistance, points 24 to 68
16

Alloy Composition

Carbon (C), % 0.35 to 0.45
0 to 0.080
Chromium (Cr), % 4.8 to 5.5
17.5 to 19.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 86.5 to 89.9
63 to 74.3
Manganese (Mn), % 0.2 to 0.5
3.5 to 6.5
Molybdenum (Mo), % 0
0.5 to 2.0
Nickel (Ni), % 0 to 0.3
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0
0.080 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0.8 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 4.0 to 5.3
0