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Annealed SAE-AISI M10 vs. ASTM A387 Grade 21 Class 1

Both annealed SAE-AISI M10 and ASTM A387 grade 21 class 1 are iron alloys. Both are furnished in the annealed condition. They have 89% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is annealed SAE-AISI M10 and the bottom bar is ASTM A387 grade 21 class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
74
Tensile Strength: Ultimate (UTS), MPa 740
500

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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