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ASTM B817 Type II vs. ACI-ASTM CD3MN Steel

ASTM B817 type II belongs to the titanium alloys classification, while ACI-ASTM CD3MN steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM B817 type II and the bottom bar is ACI-ASTM CD3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 3.0 to 13
29
Fatigue Strength, MPa 390 to 530
340
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 40
79
Tensile Strength: Ultimate (UTS), MPa 900 to 960
710
Tensile Strength: Yield (Proof), MPa 780 to 900
460

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 350
1060
Melting Completion (Liquidus), °C 1580
1450
Melting Onset (Solidus), °C 1530
1400
Specific Heat Capacity, J/kg-K 550
480
Thermal Expansion, µm/m-K 9.9
13

Otherwise Unclassified Properties

Base Metal Price, % relative 37
18
Density, g/cm3 4.6
7.8
Embodied Carbon, kg CO2/kg material 40
3.6
Embodied Energy, MJ/kg 650
50
Embodied Water, L/kg 220
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
180
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
530
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 34
25
Strength to Weight: Axial, points 55 to 58
25
Strength to Weight: Bending, points 45 to 47
23
Thermal Shock Resistance, points 62 to 66
20

Alloy Composition


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Aluminum (Al), % 5.0 to 6.0
0
Carbon (C), % 0 to 0.1
0 to 0.030
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
21 to 23.5
Copper (Cu), % 0.35 to 1.0
0 to 1.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0.35 to 1.0
62.6 to 71.9
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
4.5 to 6.5
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 to 1.0
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 1.5 to 2.5
0
Titanium (Ti), % 82.1 to 87.8
0
Vanadium (V), % 5.0 to 6.0
0
Residuals, % 0 to 0.4
0