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SAE-AISI H25 Steel vs. S21800 Stainless Steel

Both SAE-AISI H25 steel and S21800 stainless steel are iron alloys. They have 67% 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 H25 steel and the bottom bar is S21800 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 79
75
Tensile Strength: Ultimate (UTS), MPa 710 to 1620
740

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Melting Completion (Liquidus), °C 1750
1360
Melting Onset (Solidus), °C 1700
1310
Specific Heat Capacity, J/kg-K 420
500
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 38
15
Density, g/cm3 9.1
7.5
Embodied Carbon, kg CO2/kg material 6.2
3.1
Embodied Energy, MJ/kg 93
45
Embodied Water, L/kg 83
150

Common Calculations

PREN (Pitting Resistance) 29
19
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
26
Strength to Weight: Axial, points 22 to 50
27
Strength to Weight: Bending, points 20 to 34
24
Thermal Shock Resistance, points 22 to 49
17

Alloy Composition

Carbon (C), % 0.22 to 0.32
0 to 0.1
Chromium (Cr), % 3.8 to 4.5
16 to 18
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 77.2 to 81.3
59.1 to 65.4
Manganese (Mn), % 0.15 to 0.4
7.0 to 9.0
Nickel (Ni), % 0 to 0.3
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0.15 to 0.4
3.5 to 4.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0.4 to 0.6
0