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ASTM A387 Grade 12 Steel vs. AWS ERTi-7

ASTM A387 grade 12 steel belongs to the iron alloys classification, while AWS ERTi-7 belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 12 steel and the bottom bar is AWS ERTi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 25
20
Fatigue Strength, MPa 190 to 230
190
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
40
Tensile Strength: Ultimate (UTS), MPa 470 to 520
340
Tensile Strength: Yield (Proof), MPa 260 to 310
280

Thermal Properties

Latent Heat of Fusion, J/g 250
420
Maximum Temperature: Mechanical, °C 430
320
Melting Completion (Liquidus), °C 1470
1670
Melting Onset (Solidus), °C 1420
1620
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 44
21
Thermal Expansion, µm/m-K 13
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.6
47
Embodied Energy, MJ/kg 21
800
Embodied Water, L/kg 51
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 110
64
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 250
360
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 16 to 18
21
Strength to Weight: Bending, points 17 to 18
24
Thermal Diffusivity, mm2/s 12
8.8
Thermal Shock Resistance, points 14 to 15
26

Alloy Composition

Carbon (C), % 0.050 to 0.17
0 to 0.030
Chromium (Cr), % 0.8 to 1.2
0
Hydrogen (H), % 0
0 to 0.0080
Iron (Fe), % 97 to 98.2
0 to 0.12
Manganese (Mn), % 0.4 to 0.65
0
Molybdenum (Mo), % 0.45 to 0.6
0
Nitrogen (N), % 0
0 to 0.015
Oxygen (O), % 0
0.080 to 0.16
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.15 to 0.4
0
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
99.417 to 99.8