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ASTM A372 Grade K Steel vs. ASTM A228 Music Wire

Both ASTM A372 grade K steel and ASTM A228 music wire are iron alloys. They have a very high 96% 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 A372 grade K steel and the bottom bar is ASTM A228 music wire.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
710
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
12
Fatigue Strength, MPa 440
1280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 490
1470
Tensile Strength: Ultimate (UTS), MPa 780
2450
Tensile Strength: Yield (Proof), MPa 620
2050

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
400
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 48
49
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 4.4
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.4
Embodied Energy, MJ/kg 24
19
Embodied Water, L/kg 57
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27
87
Strength to Weight: Bending, points 24
52
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 23
79

Alloy Composition

Carbon (C), % 0 to 0.18
0.7 to 1.0
Chromium (Cr), % 1.0 to 1.8
0
Iron (Fe), % 93.4 to 96.6
98 to 99
Manganese (Mn), % 0.1 to 0.4
0.2 to 0.6
Molybdenum (Mo), % 0.2 to 0.6
0
Nickel (Ni), % 2.0 to 3.3
0
Phosphorus (P), % 0 to 0.015
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0.1 to 0.3
Sulfur (S), % 0 to 0.010
0 to 0.030