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ASTM A228 Music Wire vs. ASTM Grade LC9 Steel

Both ASTM A228 music wire and ASTM grade LC9 steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 27 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 A228 music wire and the bottom bar is ASTM grade LC9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12
22
Fatigue Strength, MPa 1280
420
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 2450
660
Tensile Strength: Yield (Proof), MPa 2050
590

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 400
430
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
10

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
8.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
2.3
Embodied Energy, MJ/kg 19
31
Embodied Water, L/kg 45
65

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
140
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 87
23
Strength to Weight: Bending, points 52
21
Thermal Shock Resistance, points 79
20

Alloy Composition

Carbon (C), % 0.7 to 1.0
0 to 0.13
Chromium (Cr), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 98 to 99
87.4 to 91.5
Manganese (Mn), % 0.2 to 0.6
0 to 0.9
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 0
8.5 to 10
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.1 to 0.3
0 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.045
Vanadium (V), % 0
0 to 0.030