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AISI 431 Stainless Steel vs. C91700 Bronze

AISI 431 stainless steel belongs to the iron alloys classification, while C91700 bronze belongs to the copper alloys. There are 29 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 431 stainless steel and the bottom bar is C91700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
90
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 15 to 17
13
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 77
41
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
330
Tensile Strength: Yield (Proof), MPa 710 to 1040
170

Thermal Properties

Latent Heat of Fusion, J/g 280
190
Maximum Temperature: Mechanical, °C 850
170
Melting Completion (Liquidus), °C 1510
1020
Melting Onset (Solidus), °C 1450
850
Specific Heat Capacity, J/kg-K 480
370
Thermal Conductivity, W/m-K 26
71
Thermal Expansion, µm/m-K 12
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
10
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
10

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
36
Density, g/cm3 7.7
8.7
Embodied Carbon, kg CO2/kg material 2.2
3.9
Embodied Energy, MJ/kg 31
63
Embodied Water, L/kg 120
400

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
35
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
140
Stiffness to Weight: Axial, points 14
6.9
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 32 to 50
11
Strength to Weight: Bending, points 27 to 36
12
Thermal Diffusivity, mm2/s 7.0
22
Thermal Shock Resistance, points 28 to 43
12

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.2
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 0
84.2 to 87.5
Iron (Fe), % 78.2 to 83.8
0 to 0.2
Lead (Pb), % 0
0 to 0.25
Manganese (Mn), % 0 to 1.0
0
Nickel (Ni), % 1.3 to 2.5
1.2 to 2.0
Phosphorus (P), % 0 to 0.040
0 to 0.3
Silicon (Si), % 0 to 1.0
0 to 0.0050
Sulfur (S), % 0 to 0.030
0 to 0.050
Tin (Sn), % 0
11.3 to 12.5
Zinc (Zn), % 0
0 to 0.25