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Grade VDC Steel vs. Solder Alloy 121

Grade VDC steel belongs to the iron alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. There are 24 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 grade VDC steel and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 510
11
Elastic (Young's, Tensile) Modulus, GPa 190
21
Poisson's Ratio 0.29
0.43
Shear Modulus, GPa 80
7.5
Tensile Strength: Ultimate (UTS), MPa 1700
32

Thermal Properties

Latent Heat of Fusion, J/g 250
29
Melting Completion (Liquidus), °C 1450
290
Melting Onset (Solidus), °C 1410
230
Specific Heat Capacity, J/kg-K 470
140
Thermal Conductivity, W/m-K 51
31
Thermal Expansion, µm/m-K 13
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
80
Density, g/cm3 7.8
11
Embodied Carbon, kg CO2/kg material 1.4
5.6
Embodied Energy, MJ/kg 19
93
Embodied Water, L/kg 47
580

Common Calculations

Stiffness to Weight: Axial, points 13
1.1
Stiffness to Weight: Bending, points 24
8.6
Strength to Weight: Axial, points 60
0.84
Strength to Weight: Bending, points 40
2.1
Thermal Diffusivity, mm2/s 14
20
Thermal Shock Resistance, points 50
3.9

Alloy Composition

Aluminum (Al), % 0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.5
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.25
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0.6 to 0.75
0
Chromium (Cr), % 0 to 0.3
0
Copper (Cu), % 0 to 0.060
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 98.3 to 99.35
0 to 0.020
Lead (Pb), % 0
83.4 to 85.5
Manganese (Mn), % 0.5 to 1.0
0
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0.15 to 0.3
0
Silver (Ag), % 0
0 to 0.1
Sulfur (S), % 0 to 0.020
0
Tin (Sn), % 0
14.5 to 15.5
Zinc (Zn), % 0
0 to 0.0010