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SAE-AISI H25 Steel vs. S31727 Stainless Steel

Both SAE-AISI H25 steel and S31727 stainless steel are iron alloys. They have 63% 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 S31727 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 79
78
Tensile Strength: Ultimate (UTS), MPa 710 to 1620
630

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1750
1440
Melting Onset (Solidus), °C 1700
1390
Specific Heat Capacity, J/kg-K 420
470
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 38
24
Density, g/cm3 9.1
8.0
Embodied Carbon, kg CO2/kg material 6.2
4.7
Embodied Energy, MJ/kg 93
64
Embodied Water, L/kg 83
180

Common Calculations

PREN (Pitting Resistance) 29
35
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 22 to 50
22
Strength to Weight: Bending, points 20 to 34
20
Thermal Shock Resistance, points 22 to 49
14

Alloy Composition

Carbon (C), % 0.22 to 0.32
0 to 0.030
Chromium (Cr), % 3.8 to 4.5
17.5 to 19
Copper (Cu), % 0 to 0.25
2.8 to 4.0
Iron (Fe), % 77.2 to 81.3
53.7 to 61.3
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 0 to 0.3
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.15 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0.4 to 0.6
0