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SAE-AISI M7 Steel vs. ASTM B817 Type II

SAE-AISI M7 steel belongs to the iron alloys classification, while ASTM B817 type II belongs to the titanium alloys. There are 19 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 M7 steel and the bottom bar is ASTM B817 type II.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
100
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 77
40
Tensile Strength: Ultimate (UTS), MPa 760 to 2210
900 to 960

Thermal Properties

Latent Heat of Fusion, J/g 270
400
Melting Completion (Liquidus), °C 1560
1580
Melting Onset (Solidus), °C 1510
1530
Specific Heat Capacity, J/kg-K 450
550
Thermal Expansion, µm/m-K 12
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 18
37
Density, g/cm3 8.1
4.6
Embodied Carbon, kg CO2/kg material 8.9
40
Embodied Energy, MJ/kg 130
650
Embodied Water, L/kg 100
220

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
34
Strength to Weight: Axial, points 26 to 76
55 to 58
Strength to Weight: Bending, points 23 to 47
45 to 47
Thermal Shock Resistance, points 24 to 69
62 to 66

Alloy Composition

Aluminum (Al), % 0
5.0 to 6.0
Carbon (C), % 1.0 to 1.1
0 to 0.1
Chlorine (Cl), % 0
0 to 0.2
Chromium (Cr), % 3.5 to 4.0
0
Copper (Cu), % 0 to 0.25
0.35 to 1.0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 79.8 to 83.8
0.35 to 1.0
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 8.2 to 9.2
0
Nickel (Ni), % 0 to 0.3
0
Nitrogen (N), % 0
0 to 0.040
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.55
0 to 0.1
Sodium (Na), % 0
0 to 0.2
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 0
82.1 to 87.8
Tungsten (W), % 1.4 to 2.1
0
Vanadium (V), % 1.8 to 2.3
5.0 to 6.0
Residuals, % 0
0 to 0.4