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SAE-AISI 4340 Steel vs. CC331G Bronze

SAE-AISI 4340 steel belongs to the iron alloys classification, while CC331G bronze belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4340 steel and the bottom bar is CC331G bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 360
140
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 12 to 22
20
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 73
43
Tensile Strength: Ultimate (UTS), MPa 690 to 1280
620
Tensile Strength: Yield (Proof), MPa 470 to 1150
240

Thermal Properties

Latent Heat of Fusion, J/g 250
230
Maximum Temperature: Mechanical, °C 430
220
Melting Completion (Liquidus), °C 1460
1060
Melting Onset (Solidus), °C 1420
1000
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 44
61
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
13
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
14

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
28
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 1.7
3.2
Embodied Energy, MJ/kg 22
53
Embodied Water, L/kg 53
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 170
97
Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 3490
250
Stiffness to Weight: Axial, points 13
7.6
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 24 to 45
21
Strength to Weight: Bending, points 22 to 33
19
Thermal Diffusivity, mm2/s 12
17
Thermal Shock Resistance, points 20 to 38
22

Alloy Composition

Aluminum (Al), % 0
8.5 to 10.5
Carbon (C), % 0.38 to 0.43
0
Chromium (Cr), % 0.7 to 0.9
0
Copper (Cu), % 0
83 to 86.5
Iron (Fe), % 95.1 to 96.3
1.5 to 3.5
Lead (Pb), % 0
0 to 0.1
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0.6 to 0.8
0 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 1.7 to 2.0
0 to 1.5
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.2
Sulfur (S), % 0 to 0.040
0
Tin (Sn), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.5