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C87900 Brass vs. ASTM A387 Grade 91 Class 2

C87900 brass belongs to the copper alloys classification, while ASTM A387 grade 91 class 2 belongs to the iron 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 C87900 brass and the bottom bar is ASTM A387 grade 91 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 25
20
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 41
75
Tensile Strength: Ultimate (UTS), MPa 480
670
Tensile Strength: Yield (Proof), MPa 240
470

Thermal Properties

Latent Heat of Fusion, J/g 190
270
Maximum Temperature: Mechanical, °C 130
600
Melting Completion (Liquidus), °C 930
1460
Melting Onset (Solidus), °C 900
1420
Specific Heat Capacity, J/kg-K 390
470
Thermal Conductivity, W/m-K 120
26
Thermal Expansion, µm/m-K 20
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 15
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 17
10

Otherwise Unclassified Properties

Base Metal Price, % relative 24
7.0
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 2.7
2.6
Embodied Energy, MJ/kg 46
37
Embodied Water, L/kg 320
88

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
120
Resilience: Unit (Modulus of Resilience), kJ/m3 270
580
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 20
25
Strength to Weight: Axial, points 17
24
Strength to Weight: Bending, points 17
22
Thermal Diffusivity, mm2/s 37
6.9
Thermal Shock Resistance, points 16
19

Alloy Composition

Aluminum (Al), % 0 to 0.15
0 to 0.020
Antimony (Sb), % 0 to 0.050
0
Arsenic (As), % 0 to 0.050
0
Carbon (C), % 0
0.080 to 0.12
Chromium (Cr), % 0
8.0 to 9.5
Copper (Cu), % 63 to 69.2
0
Iron (Fe), % 0 to 0.4
87.3 to 90.3
Lead (Pb), % 0 to 0.25
0
Manganese (Mn), % 0 to 0.15
0.3 to 0.6
Molybdenum (Mo), % 0
0.85 to 1.1
Nickel (Ni), % 0 to 0.5
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.010
0 to 0.020
Silicon (Si), % 0.8 to 1.2
0.2 to 0.5
Sulfur (S), % 0 to 0.050
0 to 0.010
Tin (Sn), % 0 to 0.25
0
Titanium (Ti), % 0
0 to 0.010
Vanadium (V), % 0
0.18 to 0.25
Zinc (Zn), % 30 to 36
0
Zirconium (Zr), % 0
0 to 0.010