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ACI-ASTM CN7M Steel vs. AWS ERTi-7

ACI-ASTM CN7M 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 ACI-ASTM CN7M steel and the bottom bar is AWS ERTi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 44
20
Fatigue Strength, MPa 190
190
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
40
Tensile Strength: Ultimate (UTS), MPa 480
340
Tensile Strength: Yield (Proof), MPa 200
280

Thermal Properties

Latent Heat of Fusion, J/g 310
420
Maximum Temperature: Mechanical, °C 1100
320
Melting Completion (Liquidus), °C 1410
1670
Melting Onset (Solidus), °C 1450
1620
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 21
21
Thermal Expansion, µm/m-K 15
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
7.3

Otherwise Unclassified Properties

Density, g/cm3 8.1
4.5
Embodied Carbon, kg CO2/kg material 5.6
47
Embodied Energy, MJ/kg 78
800
Embodied Water, L/kg 210
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
64
Resilience: Unit (Modulus of Resilience), kJ/m3 110
360
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 17
21
Strength to Weight: Bending, points 17
24
Thermal Diffusivity, mm2/s 5.6
8.8
Thermal Shock Resistance, points 12
26

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 19 to 22
0
Copper (Cu), % 3.0 to 4.0
0
Hydrogen (H), % 0
0 to 0.0080
Iron (Fe), % 37.4 to 48.5
0 to 0.12
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 27.5 to 30.5
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 0.040
0
Silicon (Si), % 0 to 1.5
0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
99.417 to 99.8