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AWS ERTi-2 vs. SAE-AISI M4 Steel

AWS ERTi-2 belongs to the titanium alloys classification, while SAE-AISI M4 steel belongs to the iron alloys. There are 21 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 AWS ERTi-2 and the bottom bar is SAE-AISI M4 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
76
Tensile Strength: Ultimate (UTS), MPa 340
770 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 420
260
Melting Completion (Liquidus), °C 1670
1610
Melting Onset (Solidus), °C 1620
1560
Specific Heat Capacity, J/kg-K 540
440
Thermal Conductivity, W/m-K 21
25
Thermal Expansion, µm/m-K 8.7
12

Otherwise Unclassified Properties

Base Metal Price, % relative 37
25
Density, g/cm3 4.5
8.3
Embodied Carbon, kg CO2/kg material 31
14
Embodied Energy, MJ/kg 510
210
Embodied Water, L/kg 110
110

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 21
26 to 72
Strength to Weight: Bending, points 24
23 to 45
Thermal Diffusivity, mm2/s 8.7
6.9
Thermal Shock Resistance, points 27
24 to 68

Alloy Composition

Carbon (C), % 0 to 0.030
1.3 to 1.4
Chromium (Cr), % 0
3.8 to 4.8
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.12
75.9 to 81.4
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0
4.3 to 5.5
Nickel (Ni), % 0
0 to 0.3
Nitrogen (N), % 0 to 0.015
0
Oxygen (O), % 0.080 to 0.16
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 0.45
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 99.667 to 99.92
0
Tungsten (W), % 0
5.3 to 6.5
Vanadium (V), % 0
3.8 to 4.5