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ASTM A228 Music Wire vs. S21904 Stainless Steel

Both ASTM A228 music wire and S21904 stainless steel are iron alloys. They have 64% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A228 music wire and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
210 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 12
17 to 51
Fatigue Strength, MPa 1280
380 to 550
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
78
Shear Strength, MPa 1470
510 to 620
Tensile Strength: Ultimate (UTS), MPa 2450
700 to 1000
Tensile Strength: Yield (Proof), MPa 2050
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
980
Melting Completion (Liquidus), °C 1450
1400
Melting Onset (Solidus), °C 1410
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 49
14
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
15
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
3.0
Embodied Energy, MJ/kg 19
43
Embodied Water, L/kg 45
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
160 to 310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 87
25 to 36
Strength to Weight: Bending, points 52
23 to 29
Thermal Diffusivity, mm2/s 13
3.8
Thermal Shock Resistance, points 79
15 to 21

Alloy Composition

Carbon (C), % 0.7 to 1.0
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Iron (Fe), % 98 to 99
59.5 to 67.4
Manganese (Mn), % 0.2 to 0.6
8.0 to 10
Nickel (Ni), % 0
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0.1 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030