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SAE-AISI M2 Steel vs. ASTM A182 Grade F5a

Both SAE-AISI M2 steel and ASTM A182 grade F5a are iron alloys. They have 86% 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 M2 steel and the bottom bar is ASTM A182 grade F5a.

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
74
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
710

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1610
1460
Melting Onset (Solidus), °C 1570
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 22
40
Thermal Expansion, µm/m-K 10
13

Otherwise Unclassified Properties

Base Metal Price, % relative 24
4.5
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.8
1.8
Embodied Energy, MJ/kg 130
24
Embodied Water, L/kg 98
69

Common Calculations

PREN (Pitting Resistance) 31
6.8
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 25 to 71
25
Strength to Weight: Bending, points 22 to 44
23
Thermal Diffusivity, mm2/s 5.9
11
Thermal Shock Resistance, points 27 to 76
20

Alloy Composition

Carbon (C), % 0.78 to 1.1
0 to 0.25
Chromium (Cr), % 3.8 to 4.5
4.0 to 6.0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 78.5 to 83.4
91.4 to 95.6
Manganese (Mn), % 0.15 to 0.4
0 to 0.6
Molybdenum (Mo), % 4.5 to 5.5
0.44 to 0.65
Nickel (Ni), % 0 to 0.3
0 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0 to 0.5
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