ASTM A228 (SWP-A, K08500) Music Wire
Carbon & Non-Alloy Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength2450MPa
Yield Strength2050MPa
Brinell Hardness710HB
Maximum Service Temperature400°C
Chemical Composition
C
0.7 to 1.0%
MN
0.2 to 0.6%
SI
0.1 to 0.3%
P
0 to 0.025%
S
0 to 0.030%
FE
98 to 99%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
12 %
Fatigue Strength
1280 MPa
Poisson's Ratio
0.29
Shear Modulus
72 GPa
Shear Strength
1470 MPa
Tensile Strength: Ultimate (UTS)
2450 MPa
Tensile Strength: Yield (Proof)
2050 MPa
Hardness
Brinell Hardness
710
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
400 °C
Melting Completion (Liquidus)
1450 °C
Melting Onset (Solidus)
1410 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
49 W/m-K
Thermal Diffusivity
13 mm 2 /s
Thermal Expansion
12 µm/m-K
Thermal Shock Resistance
79 points
Electrical
Electrical Conductivity: Equal Volume
7.1 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.2 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
280 MJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
87 points
Strength to Weight: Bending
52 points
Environmental
Base Metal Price
1.8 % relative
Embodied Carbon
1.4 kg CO 2 /kg material
Embodied Energy
19 MJ/kg
Embodied Energy
19 MJ/kg 8.0 x 10 3 BTU/lb
Embodied Water
45 L/kg
Embodied Water
45 L/kg 5.4 gal/lb
Registered Designations & Aliases
ASTM A228 (SWP-A, K08500) Music WireK08500SWP-A
Standards
ASTM A228 ASTM A228: Standard Specification for Steel Wire, Music Spring Quality