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ASTM A228 Music Wire vs. Grade 7 Titanium

ASTM A228 music wire belongs to the iron alloys classification, while grade 7 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A228 music wire and the bottom bar is grade 7 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
150
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 12
24
Fatigue Strength, MPa 1280
250
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 72
38
Shear Strength, MPa 1470
270
Tensile Strength: Ultimate (UTS), MPa 2450
420
Tensile Strength: Yield (Proof), MPa 2050
340

Thermal Properties

Latent Heat of Fusion, J/g 250
420
Maximum Temperature: Mechanical, °C 400
320
Melting Completion (Liquidus), °C 1450
1660
Melting Onset (Solidus), °C 1410
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 49
22
Thermal Expansion, µm/m-K 12
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
7.2

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.4
47
Embodied Energy, MJ/kg 19
800
Embodied Water, L/kg 45
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
95
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 87
26
Strength to Weight: Bending, points 52
28
Thermal Diffusivity, mm2/s 13
8.9
Thermal Shock Resistance, points 79
31

Alloy Composition

Carbon (C), % 0.7 to 1.0
0 to 0.080
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 98 to 99
0 to 0.3
Manganese (Mn), % 0.2 to 0.6
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.1 to 0.3
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
98.7 to 99.88
Residuals, % 0
0 to 0.4