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C87800 Brass vs. ASTM A387 Grade 21 Steel

C87800 brass belongs to the copper alloys classification, while ASTM A387 grade 21 steel 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 C87800 brass and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 25
21
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 42
74
Tensile Strength: Ultimate (UTS), MPa 590
500 to 590
Tensile Strength: Yield (Proof), MPa 350
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Maximum Temperature: Mechanical, °C 170
480
Melting Completion (Liquidus), °C 920
1470
Melting Onset (Solidus), °C 820
1430
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 28
41
Thermal Expansion, µm/m-K 18
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 27
4.1
Density, g/cm3 8.3
7.9
Embodied Carbon, kg CO2/kg material 2.7
1.8
Embodied Energy, MJ/kg 44
23
Embodied Water, L/kg 300
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 540
140 to 320
Stiffness to Weight: Axial, points 7.4
13
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 20
18 to 21
Strength to Weight: Bending, points 19
18 to 20
Thermal Diffusivity, mm2/s 8.3
11
Thermal Shock Resistance, points 21
14 to 17

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Antimony (Sb), % 0 to 0.050
0
Arsenic (As), % 0 to 0.050
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
2.8 to 3.3
Copper (Cu), % 80 to 84.2
0
Iron (Fe), % 0 to 0.15
94.4 to 96
Lead (Pb), % 0 to 0.15
0
Magnesium (Mg), % 0 to 0.010
0
Manganese (Mn), % 0 to 0.15
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.010
0 to 0.025
Silicon (Si), % 3.8 to 4.2
0 to 0.5
Sulfur (S), % 0 to 0.050
0 to 0.025
Tin (Sn), % 0 to 0.25
0
Zinc (Zn), % 12 to 16
0
Residuals, % 0 to 0.5
0