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SAE-AISI M6 Steel vs. ASTM A387 Grade 2 Steel

Both SAE-AISI M6 steel and ASTM A387 grade 2 steel are iron alloys. They have 74% 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 M6 steel and the bottom bar is ASTM A387 grade 2 steel.

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 840 to 2210
470 to 550

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1560
1470
Melting Onset (Solidus), °C 1510
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 17
45
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 39
2.6
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.0
1.6
Embodied Energy, MJ/kg 120
20
Embodied Water, L/kg 160
50

Common Calculations

PREN (Pitting Resistance) 28
2.4
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28 to 73
16 to 20
Strength to Weight: Bending, points 24 to 45
17 to 19
Thermal Diffusivity, mm2/s 4.7
12
Thermal Shock Resistance, points 26 to 68
14 to 16

Alloy Composition

Carbon (C), % 0.75 to 0.85
0.050 to 0.21
Chromium (Cr), % 3.8 to 4.5
0.5 to 0.8
Cobalt (Co), % 11 to 13
0
Iron (Fe), % 68.8 to 74.6
97.1 to 98.3
Manganese (Mn), % 0.15 to 0.4
0.55 to 0.8
Molybdenum (Mo), % 4.5 to 5.5
0.45 to 0.6
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.2 to 0.45
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 3.8 to 4.8
0
Vanadium (V), % 1.3 to 1.7
0

Comparable Variants