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ACI-ASTM CN7M Steel vs. AWS ERTi-1

ACI-ASTM CN7M steel belongs to the iron alloys classification, while AWS ERTi-1 belongs to the titanium 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 ACI-ASTM CN7M steel and the bottom bar is AWS ERTi-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 44
24
Fatigue Strength, MPa 190
120
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
41
Tensile Strength: Ultimate (UTS), MPa 480
240
Tensile Strength: Yield (Proof), MPa 200
170

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
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 32
37
Density, g/cm3 8.1
4.5
Embodied Carbon, kg CO2/kg material 5.6
31
Embodied Energy, MJ/kg 78
510
Embodied Water, L/kg 210
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
52
Resilience: Unit (Modulus of Resilience), kJ/m3 110
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 17
15
Strength to Weight: Bending, points 17
19
Thermal Diffusivity, mm2/s 5.6
8.7
Thermal Shock Resistance, points 12
19

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 0.0050
Iron (Fe), % 37.4 to 48.5
0 to 0.080
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 0.012
Oxygen (O), % 0
0.030 to 0.1
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.5
0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
99.773 to 99.97