Grade VDC Steel vs. ASTM B628 Ag-Cu

Grade VDC steel belongs to the iron alloys classification, while ASTM B628 Ag-Cu belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is grade VDC steel and the bottom bar is ASTM B628 Ag-Cu.

Grade VDC Spring Steel ASTM B628 Silver-Copper Eutectic Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		83

Poisson's Ratio		0.29
Poisson's Ratio		0.36

Shear Modulus, GPa		80
Shear Modulus, GPa		31

Tensile Strength: Ultimate (UTS), MPa		1700
Tensile Strength: Ultimate (UTS), MPa		350 to 760

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		140

Melting Completion (Liquidus), °C		1450
Melting Completion (Liquidus), °C		780

Melting Onset (Solidus), °C		1410
Melting Onset (Solidus), °C		780

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		280

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		7.1
Electrical Conductivity: Equal Volume, % IACS		84

Electrical Conductivity: Equal Weight (Specific), % IACS		8.1
Electrical Conductivity: Equal Weight (Specific), % IACS		75

Otherwise Unclassified Properties

Density, g/cm³		7.8
Density, g/cm³		10

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		4.6

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		14

Strength to Weight: Axial, points		60
Strength to Weight: Axial, points		9.5 to 21

Strength to Weight: Bending, points		40
Strength to Weight: Bending, points		11 to 18

Thermal Shock Resistance, points		50
Thermal Shock Resistance, points		16 to 34

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.0050

Cadmium (Cd), %		0
Cadmium (Cd), %		0 to 0.050

Carbon (C), %		0.6 to 0.75
Carbon (C), %		0

Chromium (Cr), %		0 to 0.3
Chromium (Cr), %		0

Copper (Cu), %		0 to 0.060
Copper (Cu), %		26.6 to 29

Iron (Fe), %		98.3 to 99.35
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0
Lead (Pb), %		0 to 0.030

Manganese (Mn), %		0.5 to 1.0
Manganese (Mn), %		0

Nickel (Ni), %		0
Nickel (Ni), %		0 to 0.010

Phosphorus (P), %		0 to 0.020
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		0.15 to 0.3
Silicon (Si), %		0

Silver (Ag), %		0
Silver (Ag), %		71 to 73

Sulfur (S), %		0 to 0.020
Sulfur (S), %		0

Zinc (Zn), %		0
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.21