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ASTM A228 Music Wire vs. AISI 302 Stainless Steel

Both ASTM A228 music wire and AISI 302 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 30 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 AISI 302 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
170 to 440
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 12
4.5 to 46
Fatigue Strength, MPa 1280
210 to 520
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Shear Strength, MPa 1470
400 to 830
Tensile Strength: Ultimate (UTS), MPa 2450
580 to 1430
Tensile Strength: Yield (Proof), MPa 2050
230 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
710
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 49
16
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
15
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.0
Embodied Energy, MJ/kg 19
42
Embodied Water, L/kg 45
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
59 to 260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 87
21 to 51
Strength to Weight: Bending, points 52
20 to 36
Thermal Diffusivity, mm2/s 13
4.4
Thermal Shock Resistance, points 79
12 to 31

Alloy Composition

Carbon (C), % 0.7 to 1.0
0 to 0.15
Chromium (Cr), % 0
17 to 19
Iron (Fe), % 98 to 99
67.9 to 75
Manganese (Mn), % 0.2 to 0.6
0 to 2.0
Nickel (Ni), % 0
8.0 to 10
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0.1 to 0.3
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030