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S31655 Stainless Steel vs. C68800 Brass

S31655 stainless steel belongs to the iron alloys classification, while C68800 brass belongs to the copper alloys. There are 30 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 S31655 stainless steel and the bottom bar is C68800 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 39
2.0 to 36
Poisson's Ratio 0.28
0.32
Rockwell B Hardness 88
81 to 99
Shear Modulus, GPa 78
41
Shear Strength, MPa 490
380 to 510
Tensile Strength: Ultimate (UTS), MPa 710
570 to 890
Tensile Strength: Yield (Proof), MPa 350
390 to 790

Thermal Properties

Latent Heat of Fusion, J/g 290
190
Maximum Temperature: Mechanical, °C 1010
160
Melting Completion (Liquidus), °C 1430
960
Melting Onset (Solidus), °C 1380
950
Specific Heat Capacity, J/kg-K 480
400
Thermal Conductivity, W/m-K 15
40
Thermal Expansion, µm/m-K 16
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
18
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
20

Otherwise Unclassified Properties

Base Metal Price, % relative 17
26
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 3.3
2.8
Embodied Energy, MJ/kg 46
48
Embodied Water, L/kg 160
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
16 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 310
710 to 2860
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 25
19 to 30
Strength to Weight: Bending, points 23
19 to 25
Thermal Diffusivity, mm2/s 4.0
12
Thermal Shock Resistance, points 16
19 to 30

Alloy Composition

Aluminum (Al), % 0
3.0 to 3.8
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 19.5 to 21.5
0
Cobalt (Co), % 0
0.25 to 0.55
Copper (Cu), % 0 to 1.0
70.8 to 75.5
Iron (Fe), % 63.2 to 71.9
0 to 0.2
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0.5 to 1.5
0
Nickel (Ni), % 8.0 to 9.5
0
Nitrogen (N), % 0.14 to 0.25
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Zinc (Zn), % 0
21.3 to 24.1
Residuals, % 0
0 to 0.5