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ASTM A387 Grade 21 Steel vs. SAE-AISI M10 Steel

Both ASTM A387 grade 21 steel and SAE-AISI M10 steel are iron alloys. They have 89% 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 ASTM A387 grade 21 steel and the bottom bar is SAE-AISI M10 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
76
Tensile Strength: Ultimate (UTS), MPa 500 to 590
740 to 2170

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1470
1520
Melting Onset (Solidus), °C 1430
1470
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 41
31
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
14
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.8
8.3
Embodied Energy, MJ/kg 23
120
Embodied Water, L/kg 62
100

Common Calculations

PREN (Pitting Resistance) 6.4
31
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
26 to 76
Strength to Weight: Bending, points 18 to 20
23 to 47
Thermal Diffusivity, mm2/s 11
8.5
Thermal Shock Resistance, points 14 to 17
23 to 68

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.84 to 1.1
Chromium (Cr), % 2.8 to 3.3
3.8 to 4.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 94.4 to 96
82.3 to 85.6
Manganese (Mn), % 0.3 to 0.6
0.1 to 0.4
Molybdenum (Mo), % 0.9 to 1.1
7.8 to 8.5
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0.2 to 0.45
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0
1.8 to 2.2

Comparable Variants