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C68400 Brass vs. AISI 431 Stainless Steel

C68400 brass belongs to the copper alloys classification, while AISI 431 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 AISI 431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
250
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 18
15 to 17
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 41
77
Shear Strength, MPa 330
550 to 840
Tensile Strength: Ultimate (UTS), MPa 540
890 to 1380
Tensile Strength: Yield (Proof), MPa 310
710 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 210
280
Maximum Temperature: Mechanical, °C 130
850
Melting Completion (Liquidus), °C 840
1510
Melting Onset (Solidus), °C 820
1450
Specific Heat Capacity, J/kg-K 400
480
Thermal Conductivity, W/m-K 66
26
Thermal Expansion, µm/m-K 20
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 87
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 99
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 23
9.0
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 2.7
2.2
Embodied Energy, MJ/kg 47
31
Embodied Water, L/kg 320
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
140 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 460
1270 to 2770
Stiffness to Weight: Axial, points 7.5
14
Stiffness to Weight: Bending, points 20
25
Strength to Weight: Axial, points 19
32 to 50
Strength to Weight: Bending, points 19
27 to 36
Thermal Diffusivity, mm2/s 21
7.0
Thermal Shock Resistance, points 18
28 to 43

Alloy Composition

Aluminum (Al), % 0 to 0.5
0
Boron (B), % 0.0010 to 0.030
0
Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
15 to 17
Copper (Cu), % 59 to 64
0
Iron (Fe), % 0 to 1.0
78.2 to 83.8
Lead (Pb), % 0 to 0.090
0
Manganese (Mn), % 0.2 to 1.5
0 to 1.0
Nickel (Ni), % 0 to 0.5
1.3 to 2.5
Phosphorus (P), % 0.030 to 0.3
0 to 0.040
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