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AWS ERTi-12 vs. S21904 Stainless Steel

AWS ERTi-12 belongs to the titanium alloys classification, while S21904 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-12 and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 12
17 to 51
Fatigue Strength, MPa 200
380 to 550
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
78
Tensile Strength: Ultimate (UTS), MPa 480
700 to 1000
Tensile Strength: Yield (Proof), MPa 340
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
980
Melting Completion (Liquidus), °C 1670
1400
Melting Onset (Solidus), °C 1620
1350
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
14
Thermal Expansion, µm/m-K 8.7
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 37
15
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 31
3.0
Embodied Energy, MJ/kg 510
43
Embodied Water, L/kg 110
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 550
380 to 2070
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 30
25 to 36
Strength to Weight: Bending, points 30
23 to 29
Thermal Diffusivity, mm2/s 8.7
3.8
Thermal Shock Resistance, points 37
15 to 21

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.15
59.5 to 67.4
Manganese (Mn), % 0
8.0 to 10
Molybdenum (Mo), % 0.2 to 0.4
0
Nickel (Ni), % 0.060 to 0.090
5.5 to 7.5
Nitrogen (N), % 0 to 0.015
0.15 to 0.4
Oxygen (O), % 0.080 to 0.16
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 99.147 to 99.66
0