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AWS ERTi-7 vs. EN 1.4640 Stainless Steel

AWS ERTi-7 belongs to the titanium alloys classification, while EN 1.4640 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-7 and the bottom bar is EN 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 20
51
Fatigue Strength, MPa 190
230 to 250
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
77
Tensile Strength: Ultimate (UTS), MPa 340
620 to 650
Tensile Strength: Yield (Proof), MPa 280
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 420
280
Maximum Temperature: Mechanical, °C 320
930
Melting Completion (Liquidus), °C 1670
1420
Melting Onset (Solidus), °C 1620
1380
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 8.7
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
2.7

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 47
2.8
Embodied Energy, MJ/kg 800
40
Embodied Water, L/kg 470
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 360
150 to 170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 21
22 to 23
Strength to Weight: Bending, points 24
21
Thermal Diffusivity, mm2/s 8.8
4.0
Thermal Shock Resistance, points 26
14 to 15

Alloy Composition

Carbon (C), % 0 to 0.030
0.030 to 0.080
Chromium (Cr), % 0
18 to 19
Copper (Cu), % 0
1.3 to 2.0
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.12
67.4 to 73.6
Manganese (Mn), % 0
1.5 to 4.0
Nickel (Ni), % 0
5.5 to 6.9
Nitrogen (N), % 0 to 0.015
0.030 to 0.11
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 0.5
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 99.417 to 99.8
0