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ASTM B817 Type II vs. R30556 Alloy

ASTM B817 type II belongs to the titanium alloys classification, while R30556 alloy 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 R30556 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
210
Elongation at Break, % 3.0 to 13
45
Fatigue Strength, MPa 390 to 530
320
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
81
Tensile Strength: Ultimate (UTS), MPa 900 to 960
780
Tensile Strength: Yield (Proof), MPa 780 to 900
350

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 350
1100
Melting Completion (Liquidus), °C 1580
1420
Melting Onset (Solidus), °C 1530
1330
Specific Heat Capacity, J/kg-K 550
450
Thermal Expansion, µm/m-K 9.9
15

Otherwise Unclassified Properties

Base Metal Price, % relative 37
70
Density, g/cm3 4.6
8.4
Embodied Carbon, kg CO2/kg material 40
8.7
Embodied Energy, MJ/kg 650
130
Embodied Water, L/kg 220
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
290
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
290
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 34
23
Strength to Weight: Axial, points 55 to 58
26
Strength to Weight: Bending, points 45 to 47
22
Thermal Shock Resistance, points 62 to 66
18

Alloy Composition

Aluminum (Al), % 5.0 to 6.0
0.1 to 0.5
Boron (B), % 0
0 to 0.020
Carbon (C), % 0 to 0.1
0.050 to 0.15
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
21 to 23
Cobalt (Co), % 0
16 to 21
Copper (Cu), % 0.35 to 1.0
0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0.35 to 1.0
20.4 to 38.2
Lanthanum (La), % 0
0.0050 to 0.1
Manganese (Mn), % 0
0.5 to 2.0
Molybdenum (Mo), % 0
2.5 to 4.0
Nickel (Ni), % 0
19 to 22.5
Niobium (Nb), % 0
0 to 0.3
Nitrogen (N), % 0 to 0.040
0.1 to 0.3
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0.2 to 0.8
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.015
Tantalum (Ta), % 0
0.3 to 1.3
Tin (Sn), % 1.5 to 2.5
0
Titanium (Ti), % 82.1 to 87.8
0
Tungsten (W), % 0
2.0 to 3.5
Vanadium (V), % 5.0 to 6.0
0
Zinc (Zn), % 0
0.0010 to 0.1
Residuals, % 0 to 0.4
0