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SAE-AISI H25 Steel vs. S44725 Stainless Steel

Both SAE-AISI H25 steel and S44725 stainless steel are iron alloys. They have 75% 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 S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 79
81
Tensile Strength: Ultimate (UTS), MPa 710 to 1620
500

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1750
1450
Melting Onset (Solidus), °C 1700
1410
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 26
17
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 38
15
Density, g/cm3 9.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
3.1
Embodied Energy, MJ/kg 93
44
Embodied Water, L/kg 83
170

Common Calculations

PREN (Pitting Resistance) 29
33
Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 22 to 50
18
Strength to Weight: Bending, points 20 to 34
18
Thermal Diffusivity, mm2/s 6.7
4.6
Thermal Shock Resistance, points 22 to 49
16

Alloy Composition

Carbon (C), % 0.22 to 0.32
0 to 0.015
Chromium (Cr), % 3.8 to 4.5
25 to 28.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 77.2 to 81.3
67.6 to 73.5
Manganese (Mn), % 0.15 to 0.4
0 to 0.4
Molybdenum (Mo), % 0
1.5 to 2.5
Nickel (Ni), % 0 to 0.3
0 to 0.3
Niobium (Nb), % 0
0 to 0.26
Nitrogen (N), % 0
0 to 0.018
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.4
0 to 0.040
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0 to 0.26
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0.4 to 0.6
0