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AWS ERTi-1 vs. S31727 Stainless Steel

AWS ERTi-1 belongs to the titanium alloys classification, while S31727 stainless steel belongs to the iron alloys. There are 25 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-1 and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 24
40
Fatigue Strength, MPa 120
240
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
78
Tensile Strength: Ultimate (UTS), MPa 240
630
Tensile Strength: Yield (Proof), MPa 170
270

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
1010
Melting Completion (Liquidus), °C 1670
1440
Melting Onset (Solidus), °C 1620
1390
Specific Heat Capacity, J/kg-K 540
470
Thermal Expansion, µm/m-K 8.7
16

Otherwise Unclassified Properties

Base Metal Price, % relative 37
24
Density, g/cm3 4.5
8.0
Embodied Carbon, kg CO2/kg material 31
4.7
Embodied Energy, MJ/kg 510
64
Embodied Water, L/kg 110
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
200
Resilience: Unit (Modulus of Resilience), kJ/m3 140
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 15
22
Strength to Weight: Bending, points 19
20
Thermal Shock Resistance, points 19
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 0
17.5 to 19
Copper (Cu), % 0
2.8 to 4.0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.080
53.7 to 61.3
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 0
14.5 to 16.5
Nitrogen (N), % 0 to 0.012
0.15 to 0.21
Oxygen (O), % 0.030 to 0.1
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 99.773 to 99.97
0