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SAE-AISI 8645 Steel vs. C38000 Brass

SAE-AISI 8645 steel belongs to the iron alloys classification, while C38000 brass belongs to the copper alloys. There are 27 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 SAE-AISI 8645 steel and the bottom bar is C38000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
100
Elongation at Break, % 12 to 23
17
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 73
39
Shear Strength, MPa 380 to 400
230
Tensile Strength: Ultimate (UTS), MPa 600 to 670
380
Tensile Strength: Yield (Proof), MPa 390 to 560
120

Thermal Properties

Latent Heat of Fusion, J/g 250
170
Maximum Temperature: Mechanical, °C 410
110
Melting Completion (Liquidus), °C 1460
800
Melting Onset (Solidus), °C 1420
760
Specific Heat Capacity, J/kg-K 470
380
Thermal Conductivity, W/m-K 39
110
Thermal Expansion, µm/m-K 13
21

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
22
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.5
2.7
Embodied Energy, MJ/kg 20
46
Embodied Water, L/kg 50
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 120
50
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 840
74
Stiffness to Weight: Axial, points 13
7.1
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 21 to 24
13
Strength to Weight: Bending, points 20 to 22
14
Thermal Diffusivity, mm2/s 10
37
Thermal Shock Resistance, points 18 to 20
13

Alloy Composition

Aluminum (Al), % 0
0 to 0.5
Carbon (C), % 0.43 to 0.48
0
Chromium (Cr), % 0.4 to 0.6
0
Copper (Cu), % 0
55 to 60
Iron (Fe), % 96.5 to 97.7
0 to 0.35
Lead (Pb), % 0
1.5 to 2.5
Manganese (Mn), % 0.75 to 1.0
0
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.4 to 0.7
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0
Tin (Sn), % 0
0 to 0.3
Zinc (Zn), % 0
35.9 to 43.5
Residuals, % 0
0 to 0.5