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ASTM B817 Type II vs. SAE-AISI 9254 Steel

ASTM B817 type II belongs to the titanium alloys classification, while SAE-AISI 9254 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 SAE-AISI 9254 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 3.0 to 13
20
Fatigue Strength, MPa 390 to 530
280
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
72
Tensile Strength: Ultimate (UTS), MPa 900 to 960
660
Tensile Strength: Yield (Proof), MPa 780 to 900
410

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 350
410
Melting Completion (Liquidus), °C 1580
1440
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
2.2
Density, g/cm3 4.6
7.7
Embodied Carbon, kg CO2/kg material 40
1.5
Embodied Energy, MJ/kg 650
20
Embodied Water, L/kg 220
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
450
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 34
25
Strength to Weight: Axial, points 55 to 58
24
Strength to Weight: Bending, points 45 to 47
22
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
0.51 to 0.59
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
0.6 to 0.8
Copper (Cu), % 0.35 to 1.0
0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0.35 to 1.0
96.1 to 97.1
Manganese (Mn), % 0
0.6 to 0.8
Nitrogen (N), % 0 to 0.040
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.1
1.2 to 1.6
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.040
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