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S82121 Stainless Steel vs. C68100 Brass

S82121 stainless steel belongs to the iron alloys classification, while C68100 brass belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S82121 stainless steel and the bottom bar is C68100 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
100
Elongation at Break, % 28
29
Poisson's Ratio 0.27
0.3
Shear Modulus, GPa 78
40
Tensile Strength: Ultimate (UTS), MPa 730
380
Tensile Strength: Yield (Proof), MPa 510
140

Thermal Properties

Latent Heat of Fusion, J/g 290
170
Maximum Temperature: Mechanical, °C 1020
120
Melting Completion (Liquidus), °C 1430
890
Melting Onset (Solidus), °C 1380
870
Specific Heat Capacity, J/kg-K 480
390
Thermal Conductivity, W/m-K 15
98
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
24
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
27

Otherwise Unclassified Properties

Base Metal Price, % relative 14
23
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.8
2.8
Embodied Energy, MJ/kg 40
47
Embodied Water, L/kg 150
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
86
Resilience: Unit (Modulus of Resilience), kJ/m3 660
94
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 25
20
Strength to Weight: Axial, points 26
13
Strength to Weight: Bending, points 23
15
Thermal Diffusivity, mm2/s 4.0
32
Thermal Shock Resistance, points 20
13

Alloy Composition

Aluminum (Al), % 0
0 to 0.010
Carbon (C), % 0 to 0.035
0
Chromium (Cr), % 21 to 23
0
Copper (Cu), % 0.2 to 1.2
56 to 60
Iron (Fe), % 66.7 to 75.4
0.25 to 1.3
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 1.0 to 2.5
0.010 to 0.5
Molybdenum (Mo), % 0.3 to 1.3
0
Nickel (Ni), % 2.0 to 4.0
0
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.040 to 0.15
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0.75 to 1.1
Zinc (Zn), % 0
36.4 to 43
Residuals, % 0
0 to 0.5