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SAE-AISI 4340 Steel vs. C86400 Bronze

SAE-AISI 4340 steel belongs to the iron alloys classification, while C86400 bronze belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4340 steel and the bottom bar is C86400 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
100
Elongation at Break, % 12 to 22
17
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 73
40
Tensile Strength: Ultimate (UTS), MPa 690 to 1280
470
Tensile Strength: Yield (Proof), MPa 470 to 1150
150

Thermal Properties

Latent Heat of Fusion, J/g 250
170
Maximum Temperature: Mechanical, °C 430
120
Melting Completion (Liquidus), °C 1460
880
Melting Onset (Solidus), °C 1420
860
Specific Heat Capacity, J/kg-K 470
390
Thermal Conductivity, W/m-K 44
88
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
19
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
22

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
23
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.7
2.8
Embodied Energy, MJ/kg 22
48
Embodied Water, L/kg 53
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 170
63
Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 3490
110
Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 24 to 45
16
Strength to Weight: Bending, points 22 to 33
17
Thermal Diffusivity, mm2/s 12
29
Thermal Shock Resistance, points 20 to 38
16

Alloy Composition

Aluminum (Al), % 0
0.5 to 1.5
Carbon (C), % 0.38 to 0.43
0
Chromium (Cr), % 0.7 to 0.9
0
Copper (Cu), % 0
56 to 62
Iron (Fe), % 95.1 to 96.3
0.4 to 2.0
Lead (Pb), % 0
0.5 to 1.5
Manganese (Mn), % 0.6 to 0.8
0.1 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 1.7 to 2.0
0 to 1.0
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
0.5 to 1.5
Zinc (Zn), % 0
34 to 42
Residuals, % 0
0 to 1.0