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SAE-AISI H25 Steel vs. ACI-ASTM CN7M Steel

Both SAE-AISI H25 steel and ACI-ASTM CN7M steel are iron alloys. They have 48% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H25 steel and the bottom bar is ACI-ASTM CN7M 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
77
Tensile Strength: Ultimate (UTS), MPa 710 to 1620
480

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Melting Completion (Liquidus), °C 1750
1410
Melting Onset (Solidus), °C 1700
1450
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 26
21
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 38
32
Density, g/cm3 9.1
8.1
Embodied Carbon, kg CO2/kg material 6.2
5.6
Embodied Energy, MJ/kg 93
78
Embodied Water, L/kg 83
210

Common Calculations

PREN (Pitting Resistance) 29
29
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 22 to 50
17
Strength to Weight: Bending, points 20 to 34
17
Thermal Diffusivity, mm2/s 6.7
5.6
Thermal Shock Resistance, points 22 to 49
12

Alloy Composition

Carbon (C), % 0.22 to 0.32
0 to 0.070
Chromium (Cr), % 3.8 to 4.5
19 to 22
Copper (Cu), % 0 to 0.25
3.0 to 4.0
Iron (Fe), % 77.2 to 81.3
37.4 to 48.5
Manganese (Mn), % 0.15 to 0.4
0 to 1.5
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0 to 0.3
27.5 to 30.5
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.4
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0.4 to 0.6
0