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ASTM A228 Music Wire vs. ASTM A369 Grade FP12

Both ASTM A228 music wire and ASTM A369 grade FP12 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 A228 music wire and the bottom bar is ASTM A369 grade FP12.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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