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C68400 Brass vs. S20431 Stainless Steel

C68400 brass belongs to the copper alloys classification, while S20431 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is C68400 brass and the bottom bar is S20431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
210
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 18
46
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 41
76
Shear Strength, MPa 330
500
Tensile Strength: Ultimate (UTS), MPa 540
710
Tensile Strength: Yield (Proof), MPa 310
350

Thermal Properties

Latent Heat of Fusion, J/g 210
280
Maximum Temperature: Mechanical, °C 130
890
Melting Completion (Liquidus), °C 840
1400
Melting Onset (Solidus), °C 820
1360
Specific Heat Capacity, J/kg-K 400
480
Thermal Conductivity, W/m-K 66
15
Thermal Expansion, µm/m-K 20
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 87
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 99
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 23
12
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 2.7
2.5
Embodied Energy, MJ/kg 47
36
Embodied Water, L/kg 320
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
270
Resilience: Unit (Modulus of Resilience), kJ/m3 460
310
Stiffness to Weight: Axial, points 7.5
14
Stiffness to Weight: Bending, points 20
25
Strength to Weight: Axial, points 19
25
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 21
4.0
Thermal Shock Resistance, points 18
15

Alloy Composition

Aluminum (Al), % 0 to 0.5
0
Boron (B), % 0.0010 to 0.030
0
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0
17 to 18
Copper (Cu), % 59 to 64
1.5 to 3.5
Iron (Fe), % 0 to 1.0
66.1 to 74.4
Lead (Pb), % 0 to 0.090
0
Manganese (Mn), % 0.2 to 1.5
5.0 to 7.0
Nickel (Ni), % 0 to 0.5
2.0 to 4.0
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0.030 to 0.3
0 to 0.045
Silicon (Si), % 1.5 to 2.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.5
0
Zinc (Zn), % 28.6 to 39.3
0
Residuals, % 0 to 0.5
0