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AWS ERTi-7 vs. AISI 348H Stainless Steel

AWS ERTi-7 belongs to the titanium alloys classification, while AISI 348H stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-7 and the bottom bar is AISI 348H 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
200
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
77
Tensile Strength: Ultimate (UTS), MPa 340
580
Tensile Strength: Yield (Proof), MPa 280
230

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
940
Melting Completion (Liquidus), °C 1670
1430
Melting Onset (Solidus), °C 1620
1390
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
3.9
Embodied Energy, MJ/kg 800
56
Embodied Water, L/kg 470
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
190
Resilience: Unit (Modulus of Resilience), kJ/m3 360
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 21
21
Strength to Weight: Bending, points 24
20
Thermal Diffusivity, mm2/s 8.8
4.1
Thermal Shock Resistance, points 26
13

Alloy Composition

Carbon (C), % 0 to 0.030
0.040 to 0.1
Chromium (Cr), % 0
17 to 19
Cobalt (Co), % 0
0 to 0.2
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.12
63.8 to 73.6
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
9.0 to 13
Niobium (Nb), % 0
0.32 to 1.0
Nitrogen (N), % 0 to 0.015
0
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 0.75
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0 to 0.1
Titanium (Ti), % 99.417 to 99.8
0