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ASTM A369 Grade FP12 vs. ASTM A228 Music Wire

Both ASTM A369 grade FP12 and ASTM A228 music wire are iron alloys. They have a very high 98% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP12 and the bottom bar is ASTM A228 music wire.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
710
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
12
Fatigue Strength, MPa 170
1280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 300
1470
Tensile Strength: Ultimate (UTS), MPa 470
2450
Tensile Strength: Yield (Proof), MPa 250
2050

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 430
400
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
49
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.4
Embodied Energy, MJ/kg 21
19
Embodied Water, L/kg 52
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
87
Strength to Weight: Bending, points 17
52
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 14
79

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.7 to 1.0
Chromium (Cr), % 0.8 to 1.3
0
Iron (Fe), % 96.8 to 98.4
98 to 99
Manganese (Mn), % 0.3 to 0.61
0.2 to 0.6
Molybdenum (Mo), % 0.44 to 0.65
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0.1 to 0.3
Sulfur (S), % 0 to 0.025
0 to 0.030