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SAE-AISI M3 Class 2 Steel vs. ASTM A182 Grade F12 Class 2

Both SAE-AISI M3 class 2 steel and ASTM A182 grade F12 class 2 are iron alloys. They have 81% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M3 class 2 steel and the bottom bar is ASTM A182 grade F12 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 770 to 2210
540

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1620
1460
Melting Onset (Solidus), °C 1570
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 26
43
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
2.8
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 12
1.6
Embodied Energy, MJ/kg 180
21
Embodied Water, L/kg 110
52

Common Calculations

PREN (Pitting Resistance) 33
2.8
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 74
19
Strength to Weight: Bending, points 22 to 45
19
Thermal Diffusivity, mm2/s 7.2
12
Thermal Shock Resistance, points 24 to 69
16

Alloy Composition

Carbon (C), % 1.2 to 1.3
0.1 to 0.2
Chromium (Cr), % 3.8 to 4.5
0.8 to 1.3
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.8 to 82.3
96.4 to 98.3
Manganese (Mn), % 0.15 to 0.4
0.3 to 0.8
Molybdenum (Mo), % 4.8 to 6.5
0.44 to 0.65
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0.1 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 5.0 to 6.8
0
Vanadium (V), % 2.8 to 3.8
0