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SAE-AISI 4340 Steel vs. C95500 Bronze

SAE-AISI 4340 steel belongs to the iron alloys classification, while C95500 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 C95500 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 360
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
120
Elongation at Break, % 12 to 22
8.4 to 10
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 73
44
Tensile Strength: Ultimate (UTS), MPa 690 to 1280
700 to 850
Tensile Strength: Yield (Proof), MPa 470 to 1150
320 to 470

Thermal Properties

Latent Heat of Fusion, J/g 250
230
Maximum Temperature: Mechanical, °C 430
230
Melting Completion (Liquidus), °C 1460
1050
Melting Onset (Solidus), °C 1420
1040
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 44
42
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
28
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 1.7
3.5
Embodied Energy, MJ/kg 22
57
Embodied Water, L/kg 53
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 170
58 to 61
Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 3490
420 to 950
Stiffness to Weight: Axial, points 13
8.0
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 24 to 45
24 to 29
Strength to Weight: Bending, points 22 to 33
21 to 24
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 20 to 38
24 to 29

Alloy Composition

Aluminum (Al), % 0
10 to 11.5
Carbon (C), % 0.38 to 0.43
0
Chromium (Cr), % 0.7 to 0.9
0
Copper (Cu), % 0
78 to 84
Iron (Fe), % 95.1 to 96.3
3.0 to 5.0
Manganese (Mn), % 0.6 to 0.8
0 to 3.5
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 1.7 to 2.0
3.0 to 5.5
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0
Residuals, % 0
0 to 0.5