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CC755S Brass vs. ASTM A387 Grade 21 Steel

CC755S brass belongs to the copper alloys classification, while ASTM A387 grade 21 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is CC755S brass and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 9.5
21
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 40
74
Tensile Strength: Ultimate (UTS), MPa 390
500 to 590
Tensile Strength: Yield (Proof), MPa 250
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 170
260
Maximum Temperature: Mechanical, °C 120
480
Melting Completion (Liquidus), °C 820
1470
Melting Onset (Solidus), °C 780
1430
Specific Heat Capacity, J/kg-K 390
470
Thermal Conductivity, W/m-K 120
41
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 30
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 23
4.1
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 2.7
1.8
Embodied Energy, MJ/kg 46
23
Embodied Water, L/kg 330
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 33
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 290
140 to 320
Stiffness to Weight: Axial, points 7.1
13
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 14
18 to 21
Strength to Weight: Bending, points 15
18 to 20
Thermal Diffusivity, mm2/s 38
11
Thermal Shock Resistance, points 13
14 to 17

Alloy Composition

Aluminum (Al), % 0.4 to 0.7
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
2.8 to 3.3
Copper (Cu), % 59.5 to 61
0
Iron (Fe), % 0.050 to 0.2
94.4 to 96
Lead (Pb), % 1.2 to 1.7
0
Manganese (Mn), % 0 to 0.050
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.050
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Tin (Sn), % 0 to 0.3
0
Zinc (Zn), % 35.8 to 38.9
0