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ASTM A228 Music Wire vs. ACI-ASTM CH20 Steel

Both ASTM A228 music wire and ACI-ASTM CH20 steel are iron alloys. They have 61% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A228 music wire and the bottom bar is ACI-ASTM CH20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 12
38
Fatigue Strength, MPa 1280
290
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
78
Tensile Strength: Ultimate (UTS), MPa 2450
610
Tensile Strength: Yield (Proof), MPa 2050
350

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1450
1410
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 49
14
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.7
Embodied Energy, MJ/kg 19
53
Embodied Water, L/kg 45
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
200
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 87
22
Strength to Weight: Bending, points 52
21
Thermal Diffusivity, mm2/s 13
3.7
Thermal Shock Resistance, points 79
15

Alloy Composition

Carbon (C), % 0.7 to 1.0
0 to 0.2
Chromium (Cr), % 0
22 to 26
Iron (Fe), % 98 to 99
54.7 to 66
Manganese (Mn), % 0.2 to 0.6
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
12 to 15
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.1 to 0.3
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040