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EN 1.7703 Steel vs. Grade 9 Titanium

EN 1.7703 steel belongs to the iron alloys classification, while grade 9 titanium belongs to the titanium alloys. There are 30 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 EN 1.7703 steel and the bottom bar is grade 9 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 20
11 to 17
Fatigue Strength, MPa 320 to 340
330 to 480
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 74
40
Shear Strength, MPa 420 to 430
430 to 580
Tensile Strength: Ultimate (UTS), MPa 670 to 690
700 to 960
Tensile Strength: Yield (Proof), MPa 460 to 500
540 to 830

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 460
330
Melting Completion (Liquidus), °C 1470
1640
Melting Onset (Solidus), °C 1430
1590
Specific Heat Capacity, J/kg-K 470
550
Thermal Conductivity, W/m-K 39
8.1
Thermal Expansion, µm/m-K 13
9.1

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.2
37
Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 2.5
36
Embodied Energy, MJ/kg 35
580
Embodied Water, L/kg 61
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 650
1380 to 3220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 24
43 to 60
Strength to Weight: Bending, points 22
39 to 48
Thermal Diffusivity, mm2/s 11
3.3
Thermal Shock Resistance, points 19 to 20
52 to 71

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0.11 to 0.15
0 to 0.080
Chromium (Cr), % 2.0 to 2.5
0
Copper (Cu), % 0 to 0.2
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 94.6 to 96.4
0 to 0.25
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0 to 0.25
0
Niobium (Nb), % 0 to 0.070
0
Nitrogen (N), % 0 to 0.012
0 to 0.030
Oxygen (O), % 0
0 to 0.15
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.1
0
Sulfur (S), % 0 to 0.0050
0
Titanium (Ti), % 0 to 0.030
92.6 to 95.5
Vanadium (V), % 0.25 to 0.35
2.0 to 3.0
Residuals, % 0
0 to 0.4