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C38000 Brass vs. ASTM A387 Grade 21 Steel

C38000 brass belongs to the copper alloys classification, while ASTM A387 grade 21 steel belongs to the iron alloys. There are 27 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 C38000 brass and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 17
21
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 39
74
Shear Strength, MPa 230
310 to 370
Tensile Strength: Ultimate (UTS), MPa 380
500 to 590
Tensile Strength: Yield (Proof), MPa 120
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 170
260
Maximum Temperature: Mechanical, °C 110
480
Melting Completion (Liquidus), °C 800
1470
Melting Onset (Solidus), °C 760
1430
Specific Heat Capacity, J/kg-K 380
470
Thermal Conductivity, W/m-K 110
41
Thermal Expansion, µm/m-K 21
13

Otherwise Unclassified Properties

Base Metal Price, % relative 22
4.1
Density, g/cm3 8.0
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 50
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 74
140 to 320
Stiffness to Weight: Axial, points 7.1
13
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 13
18 to 21
Strength to Weight: Bending, points 14
18 to 20
Thermal Diffusivity, mm2/s 37
11
Thermal Shock Resistance, points 13
14 to 17

Alloy Composition

Aluminum (Al), % 0 to 0.5
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
2.8 to 3.3
Copper (Cu), % 55 to 60
0
Iron (Fe), % 0 to 0.35
94.4 to 96
Lead (Pb), % 1.5 to 2.5
0
Manganese (Mn), % 0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Tin (Sn), % 0 to 0.3
0
Zinc (Zn), % 35.9 to 43.5
0
Residuals, % 0 to 0.5
0