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AISI 321 Stainless Steel vs. C87700 Bronze

AISI 321 stainless steel belongs to the iron alloys classification, while C87700 bronze belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is C87700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 34 to 50
3.6
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
42
Tensile Strength: Ultimate (UTS), MPa 590 to 690
300
Tensile Strength: Yield (Proof), MPa 220 to 350
120

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 870
180
Melting Completion (Liquidus), °C 1430
980
Melting Onset (Solidus), °C 1400
900
Specific Heat Capacity, J/kg-K 480
400
Thermal Conductivity, W/m-K 16
120
Thermal Expansion, µm/m-K 17
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
45
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
48

Otherwise Unclassified Properties

Base Metal Price, % relative 16
29
Density, g/cm3 7.8
8.5
Embodied Carbon, kg CO2/kg material 3.2
2.7
Embodied Energy, MJ/kg 45
45
Embodied Water, L/kg 140
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
8.6
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
64
Stiffness to Weight: Axial, points 14
7.4
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 21 to 25
9.8
Strength to Weight: Bending, points 20 to 22
12
Thermal Diffusivity, mm2/s 4.1
34
Thermal Shock Resistance, points 13 to 15
11

Alloy Composition

Antimony (Sb), % 0
0 to 0.1
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
87.5 to 90.5
Iron (Fe), % 65.3 to 74
0 to 0.5
Lead (Pb), % 0
0 to 0.090
Manganese (Mn), % 0 to 2.0
0 to 0.8
Nickel (Ni), % 9.0 to 12
0 to 0.25
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.15
Silicon (Si), % 0 to 0.75
2.5 to 3.5
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 2.0
Titanium (Ti), % 0 to 0.7
0
Zinc (Zn), % 0
7.0 to 9.0
Residuals, % 0
0 to 0.8