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SAE-AISI H25 Steel vs. SAE-AISI S7 Steel

Both SAE-AISI H25 steel and SAE-AISI S7 steel are iron alloys. They have 84% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H25 steel and the bottom bar is SAE-AISI S7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 79
74
Tensile Strength: Ultimate (UTS), MPa 710 to 1620
670 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1750
1460
Melting Onset (Solidus), °C 1700
1420
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 26
40
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 38
5.0
Density, g/cm3 9.1
7.8
Embodied Carbon, kg CO2/kg material 6.2
2.3
Embodied Energy, MJ/kg 93
31
Embodied Water, L/kg 83
65

Common Calculations

PREN (Pitting Resistance) 29
8.4
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 22 to 50
24 to 72
Strength to Weight: Bending, points 20 to 34
22 to 46
Thermal Diffusivity, mm2/s 6.7
11
Thermal Shock Resistance, points 22 to 49
22 to 66

Alloy Composition

Carbon (C), % 0.22 to 0.32
0.45 to 0.55
Chromium (Cr), % 3.8 to 4.5
3.0 to 3.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 77.2 to 81.3
91.6 to 94.9
Manganese (Mn), % 0.15 to 0.4
0.2 to 0.9
Molybdenum (Mo), % 0
1.3 to 1.8
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.15 to 0.4
0.2 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 to 0.3

Comparable Variants