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Annealed SAE-AISI H25 vs. Annealed SAE-AISI M2

Both annealed SAE-AISI H25 and annealed SAE-AISI M2 are iron alloys. Both are furnished in the annealed condition. They have a moderately high 91% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is annealed SAE-AISI H25 and the bottom bar is annealed SAE-AISI M2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 710
760

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1750
1610
Melting Onset (Solidus), °C 1700
1570
Specific Heat Capacity, J/kg-K 420
440
Thermal Conductivity, W/m-K 26
22
Thermal Expansion, µm/m-K 12
10

Otherwise Unclassified Properties

Base Metal Price, % relative 38
24
Density, g/cm3 9.1
8.4
Embodied Carbon, kg CO2/kg material 6.2
8.8
Embodied Energy, MJ/kg 93
130
Embodied Water, L/kg 83
98

Common Calculations

PREN (Pitting Resistance) 29
31
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 22
25
Strength to Weight: Bending, points 20
22
Thermal Diffusivity, mm2/s 6.7
5.9
Thermal Shock Resistance, points 22
27

Alloy Composition

Carbon (C), % 0.22 to 0.32
0.78 to 1.1
Chromium (Cr), % 3.8 to 4.5
3.8 to 4.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 77.2 to 81.3
78.5 to 83.4
Manganese (Mn), % 0.15 to 0.4
0.15 to 0.4
Molybdenum (Mo), % 0
4.5 to 5.5
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.15 to 0.4
0.2 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 14 to 16
5.5 to 6.8
Vanadium (V), % 0.4 to 0.6
1.8 to 2.2