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Annealed SAE-AISI M2 vs. Annealed SAE-AISI S5

Both annealed SAE-AISI M2 and annealed SAE-AISI S5 are iron alloys. Both are furnished in the annealed condition. They have 84% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is annealed SAE-AISI M2 and the bottom bar is annealed SAE-AISI S5.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Rockwell B Hardness 99
95
Shear Modulus, GPa 77
72
Tensile Strength: Ultimate (UTS), MPa 760
680

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1610
1440
Melting Onset (Solidus), °C 1570
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 22
42
Thermal Expansion, µm/m-K 10
12

Otherwise Unclassified Properties

Base Metal Price, % relative 24
3.1
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.8
2.1
Embodied Energy, MJ/kg 130
29
Embodied Water, L/kg 98
51

Common Calculations

PREN (Pitting Resistance) 31
2.9
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 25
25
Strength to Weight: Bending, points 22
22
Thermal Diffusivity, mm2/s 5.9
11
Thermal Shock Resistance, points 27
23

Alloy Composition

Carbon (C), % 0.78 to 1.1
0.5 to 0.65
Chromium (Cr), % 3.8 to 4.5
0 to 0.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 78.5 to 83.4
93.6 to 97
Manganese (Mn), % 0.15 to 0.4
0.6 to 1.0
Molybdenum (Mo), % 4.5 to 5.5
0.2 to 1.4
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
1.8 to 2.3
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0 to 0.35