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AWS ERTi-7 vs. SAE-AISI M7 Steel

AWS ERTi-7 belongs to the titanium alloys classification, while SAE-AISI M7 steel belongs to the iron alloys. There are 20 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 AWS ERTi-7 and the bottom bar is SAE-AISI M7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
77
Tensile Strength: Ultimate (UTS), MPa 340
760 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 420
270
Melting Completion (Liquidus), °C 1670
1560
Melting Onset (Solidus), °C 1620
1510
Specific Heat Capacity, J/kg-K 540
450
Thermal Conductivity, W/m-K 21
28
Thermal Expansion, µm/m-K 8.7
12

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.1
Embodied Carbon, kg CO2/kg material 47
8.9
Embodied Energy, MJ/kg 800
130
Embodied Water, L/kg 470
100

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 21
26 to 76
Strength to Weight: Bending, points 24
23 to 47
Thermal Diffusivity, mm2/s 8.8
7.8
Thermal Shock Resistance, points 26
24 to 69

Alloy Composition

Carbon (C), % 0 to 0.030
1.0 to 1.1
Chromium (Cr), % 0
3.5 to 4.0
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.12
79.8 to 83.8
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0
8.2 to 9.2
Nickel (Ni), % 0
0 to 0.3
Nitrogen (N), % 0 to 0.015
0
Oxygen (O), % 0.080 to 0.16
0
Palladium (Pd), % 0.12 to 0.25
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 0.55
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 99.417 to 99.8
0
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.8 to 2.3