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ASTM A229 Spring Steel vs. Solder Alloy 704

ASTM A229 spring steel belongs to the iron alloys classification, while solder alloy 704 belongs to the otherwise unclassified metals. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 704.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 490 to 550
14
Elastic (Young's, Tensile) Modulus, GPa 190
51
Elongation at Break, % 14
30
Poisson's Ratio 0.29
0.36
Shear Modulus, GPa 72
19
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
55

Thermal Properties

Latent Heat of Fusion, J/g 250
62
Melting Completion (Liquidus), °C 1450
240
Melting Onset (Solidus), °C 1410
220
Specific Heat Capacity, J/kg-K 470
220
Thermal Conductivity, W/m-K 50
50
Thermal Expansion, µm/m-K 12
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
13
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
15

Otherwise Unclassified Properties

Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 1.4
19
Embodied Energy, MJ/kg 19
320

Common Calculations

Stiffness to Weight: Axial, points 13
3.8
Stiffness to Weight: Bending, points 24
17
Strength to Weight: Axial, points 60 to 67
2.1
Strength to Weight: Bending, points 40 to 43
4.3
Thermal Diffusivity, mm2/s 14
30
Thermal Shock Resistance, points 54 to 60
3.5

Alloy Composition

Aluminum (Al), % 0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.1
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.1
Cadmium (Cd), % 0
0 to 0.0020
Carbon (C), % 0.55 to 0.85
0
Copper (Cu), % 0
0 to 0.050
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
0 to 0.070
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
4.8 to 5.2
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 0
94.3 to 95.2
Zinc (Zn), % 0
0 to 0.0010