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ASTM B817 Type II vs. EN 1.8918 Steel

ASTM B817 type II belongs to the titanium alloys classification, while EN 1.8918 steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM B817 type II and the bottom bar is EN 1.8918 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 3.0 to 13
19
Fatigue Strength, MPa 390 to 530
330
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
73
Tensile Strength: Ultimate (UTS), MPa 900 to 960
640
Tensile Strength: Yield (Proof), MPa 780 to 900
490

Thermal Properties

Latent Heat of Fusion, J/g 400
250
Maximum Temperature: Mechanical, °C 350
400
Melting Completion (Liquidus), °C 1580
1460
Melting Onset (Solidus), °C 1530
1420
Specific Heat Capacity, J/kg-K 550
470
Thermal Expansion, µm/m-K 9.9
13

Otherwise Unclassified Properties

Base Metal Price, % relative 37
2.5
Density, g/cm3 4.6
7.8
Embodied Carbon, kg CO2/kg material 40
1.7
Embodied Energy, MJ/kg 650
24
Embodied Water, L/kg 220
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
640
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 34
24
Strength to Weight: Axial, points 55 to 58
23
Strength to Weight: Bending, points 45 to 47
21
Thermal Shock Resistance, points 62 to 66
19

Alloy Composition


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Aluminum (Al), % 5.0 to 6.0
0.020 to 0.050
Carbon (C), % 0 to 0.1
0 to 0.2
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
0 to 0.3
Copper (Cu), % 0.35 to 1.0
0 to 0.7
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0.35 to 1.0
95.2 to 98.9
Manganese (Mn), % 0
1.1 to 1.7
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 0
0 to 0.8
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0 to 0.040
0 to 0.025
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.1
0 to 0.6
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.0050
Tin (Sn), % 1.5 to 2.5
0
Titanium (Ti), % 82.1 to 87.8
0 to 0.030
Vanadium (V), % 5.0 to 6.0
0 to 0.2
Residuals, % 0 to 0.4
0