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AWS ERTi-7 vs. EN 1.4439 Stainless Steel

AWS ERTi-7 belongs to the titanium alloys classification, while EN 1.4439 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-7 and the bottom bar is EN 1.4439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 20
40
Fatigue Strength, MPa 190
270
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
79
Tensile Strength: Ultimate (UTS), MPa 340
680
Tensile Strength: Yield (Proof), MPa 280
310

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
980
Melting Completion (Liquidus), °C 1670
1460
Melting Onset (Solidus), °C 1620
1410
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
14
Thermal Expansion, µm/m-K 8.7
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
2.3

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 47
4.5
Embodied Energy, MJ/kg 800
61
Embodied Water, L/kg 470
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
220
Resilience: Unit (Modulus of Resilience), kJ/m3 360
240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 21
24
Strength to Weight: Bending, points 24
22
Thermal Diffusivity, mm2/s 8.8
3.8
Thermal Shock Resistance, points 26
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 0
16.5 to 18.5
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.12
58.7 to 66.9
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 0
12.5 to 14.5
Nitrogen (N), % 0 to 0.015
0.12 to 0.22
Oxygen (O), % 0.080 to 0.16
0
Palladium (Pd), % 0.12 to 0.25
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 99.417 to 99.8
0