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SAE-AISI H25 Steel vs. S32803 Stainless Steel

Both SAE-AISI H25 steel and S32803 stainless steel are iron alloys. They have 70% 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 H25 steel and the bottom bar is S32803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 79
81
Tensile Strength: Ultimate (UTS), MPa 710 to 1620
680

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Melting Completion (Liquidus), °C 1750
1450
Melting Onset (Solidus), °C 1700
1400
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 26
16
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 38
19
Density, g/cm3 9.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
3.7
Embodied Energy, MJ/kg 93
53
Embodied Water, L/kg 83
180

Common Calculations

PREN (Pitting Resistance) 29
36
Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 22 to 50
25
Strength to Weight: Bending, points 20 to 34
22
Thermal Diffusivity, mm2/s 6.7
4.4
Thermal Shock Resistance, points 22 to 49
22

Alloy Composition

Carbon (C), % 0.22 to 0.32
0 to 0.015
Chromium (Cr), % 3.8 to 4.5
28 to 29
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 77.2 to 81.3
62.9 to 67.1
Manganese (Mn), % 0.15 to 0.4
0 to 0.5
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 0 to 0.3
3.0 to 4.0
Niobium (Nb), % 0
0.15 to 0.5
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.15 to 0.4
0 to 0.55
Sulfur (S), % 0 to 0.030
0 to 0.0035
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0.4 to 0.6
0