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SAE-AISI M33 Steel vs. Solder Alloy 121

SAE-AISI M33 steel belongs to the iron alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M33 steel and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
21
Poisson's Ratio 0.29
0.43
Shear Modulus, GPa 78
7.5
Tensile Strength: Ultimate (UTS), MPa 810 to 2210
32

Thermal Properties

Latent Heat of Fusion, J/g 270
29
Melting Completion (Liquidus), °C 1550
290
Melting Onset (Solidus), °C 1500
230
Specific Heat Capacity, J/kg-K 440
140
Thermal Conductivity, W/m-K 20
31
Thermal Expansion, µm/m-K 12
28

Otherwise Unclassified Properties

Base Metal Price, % relative 32
80
Density, g/cm3 8.2
11
Embodied Carbon, kg CO2/kg material 7.7
5.6
Embodied Energy, MJ/kg 110
93
Embodied Water, L/kg 150
580

Common Calculations

Stiffness to Weight: Axial, points 14
1.1
Stiffness to Weight: Bending, points 24
8.6
Strength to Weight: Axial, points 27 to 75
0.84
Strength to Weight: Bending, points 24 to 46
2.1
Thermal Diffusivity, mm2/s 5.5
20
Thermal Shock Resistance, points 25 to 68
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), % 0.85 to 0.92
0
Chromium (Cr), % 3.5 to 4.0
0
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 71.4 to 76.3
0 to 0.020
Lead (Pb), % 0
83.4 to 85.5
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 9.0 to 10
0
Nickel (Ni), % 0 to 0.3
0 to 0.010
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.15 to 0.5
0
Silver (Ag), % 0
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
14.5 to 15.5
Tungsten (W), % 1.3 to 2.1
0
Vanadium (V), % 1.0 to 1.4
0
Zinc (Zn), % 0
0 to 0.0010