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ASTM Grade HT Steel vs. Grade 11 Titanium

ASTM grade HT steel belongs to the iron alloys classification, while grade 11 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HT steel and the bottom bar is grade 11 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
120
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 4.6
29
Fatigue Strength, MPa 130
170
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
38
Tensile Strength: Ultimate (UTS), MPa 500
310
Tensile Strength: Yield (Proof), MPa 270
230

Thermal Properties

Latent Heat of Fusion, J/g 310
420
Maximum Temperature: Mechanical, °C 1010
320
Melting Completion (Liquidus), °C 1390
1660
Melting Onset (Solidus), °C 1340
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 12
22
Thermal Expansion, µm/m-K 15
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
3.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
7.3

Otherwise Unclassified Properties

Density, g/cm3 8.0
4.5
Embodied Carbon, kg CO2/kg material 5.4
47
Embodied Energy, MJ/kg 76
800
Embodied Water, L/kg 190
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
81
Resilience: Unit (Modulus of Resilience), kJ/m3 180
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 3.2
8.9
Thermal Shock Resistance, points 12
22

Alloy Composition


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Carbon (C), % 0.35 to 0.75
0 to 0.080
Chromium (Cr), % 15 to 19
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 38.2 to 51.7
0 to 0.2
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 33 to 37
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.5
0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
98.8 to 99.88
Residuals, % 0
0 to 0.4