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ASTM A229 Spring Steel vs. Solder Alloy 123

ASTM A229 spring steel belongs to the iron alloys classification, while solder alloy 123 belongs to the otherwise unclassified metals. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is solder alloy 123.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 490 to 550
8.0
Elastic (Young's, Tensile) Modulus, GPa 190
18
Elongation at Break, % 14
45
Poisson's Ratio 0.29
0.44
Shear Modulus, GPa 72
6.2
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
28

Thermal Properties

Latent Heat of Fusion, J/g 250
26
Melting Completion (Liquidus), °C 1450
310
Melting Onset (Solidus), °C 1410
300
Specific Heat Capacity, J/kg-K 470
130
Thermal Conductivity, W/m-K 50
23
Thermal Expansion, µm/m-K 12
29

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
75
Density, g/cm3 7.8
11
Embodied Carbon, kg CO2/kg material 1.4
4.5
Embodied Energy, MJ/kg 19
74
Embodied Water, L/kg 46
500

Common Calculations

Stiffness to Weight: Axial, points 13
0.9
Stiffness to Weight: Bending, points 24
7.8
Strength to Weight: Axial, points 60 to 67
0.69
Strength to Weight: Bending, points 40 to 43
1.8
Thermal Diffusivity, mm2/s 14
16
Thermal Shock Resistance, points 54 to 60
3.8

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 0.1
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0.55 to 0.85
0
Copper (Cu), % 0
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 97.5 to 99
0 to 0.020
Lead (Pb), % 0
93.5 to 95.5
Manganese (Mn), % 0.3 to 1.2
0
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
0
Silver (Ag), % 0
0 to 0.1
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 0
4.5 to 5.5
Zinc (Zn), % 0
0 to 0.0010