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AWS ERTi-5 vs. ASTM A387 Grade 21L Class 1

AWS ERTi-5 belongs to the titanium alloys classification, while ASTM A387 grade 21L class 1 belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-5 and the bottom bar is ASTM A387 grade 21L class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 10
21
Fatigue Strength, MPa 470
160
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
74
Tensile Strength: Ultimate (UTS), MPa 900
500
Tensile Strength: Yield (Proof), MPa 830
230

Thermal Properties

Latent Heat of Fusion, J/g 410
260
Maximum Temperature: Mechanical, °C 340
480
Melting Completion (Liquidus), °C 1610
1470
Melting Onset (Solidus), °C 1560
1430
Specific Heat Capacity, J/kg-K 560
470
Thermal Conductivity, W/m-K 7.1
41
Thermal Expansion, µm/m-K 9.6
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 36
4.1
Density, g/cm3 4.4
7.9
Embodied Carbon, kg CO2/kg material 38
1.8
Embodied Energy, MJ/kg 610
23
Embodied Water, L/kg 200
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87
84
Resilience: Unit (Modulus of Resilience), kJ/m3 3250
140
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 56
18
Strength to Weight: Bending, points 46
18
Thermal Diffusivity, mm2/s 2.9
11
Thermal Shock Resistance, points 63
14

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.050
0 to 0.1
Chromium (Cr), % 0
2.8 to 3.3
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.22
94.4 to 96.1
Manganese (Mn), % 0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0.12 to 0.2
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 88.2 to 90.9
0
Vanadium (V), % 3.5 to 4.5
0