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ASTM A387 Grade 21 Steel vs. CC490K Brass

ASTM A387 grade 21 steel belongs to the iron alloys classification, while CC490K brass belongs to the copper 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 ASTM A387 grade 21 steel and the bottom bar is CC490K brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
76
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 21
15
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 74
40
Tensile Strength: Ultimate (UTS), MPa 500 to 590
230
Tensile Strength: Yield (Proof), MPa 230 to 350
110

Thermal Properties

Latent Heat of Fusion, J/g 260
190
Maximum Temperature: Mechanical, °C 480
160
Melting Completion (Liquidus), °C 1470
980
Melting Onset (Solidus), °C 1430
910
Specific Heat Capacity, J/kg-K 470
370
Thermal Conductivity, W/m-K 41
72
Thermal Expansion, µm/m-K 13
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
16
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
16

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
30
Density, g/cm3 7.9
8.8
Embodied Carbon, kg CO2/kg material 1.8
2.9
Embodied Energy, MJ/kg 23
47
Embodied Water, L/kg 62
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
28
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
54
Stiffness to Weight: Axial, points 13
6.8
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 18 to 21
7.3
Strength to Weight: Bending, points 18 to 20
9.5
Thermal Diffusivity, mm2/s 11
22
Thermal Shock Resistance, points 14 to 17
8.2

Alloy Composition

Aluminum (Al), % 0
0 to 0.010
Antimony (Sb), % 0
0 to 0.3
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 2.8 to 3.3
0
Copper (Cu), % 0
81 to 86
Iron (Fe), % 94.4 to 96
0 to 0.5
Lead (Pb), % 0
3.0 to 6.0
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
0 to 2.0
Phosphorus (P), % 0 to 0.025
0 to 0.050
Silicon (Si), % 0 to 0.5
0 to 0.010
Sulfur (S), % 0 to 0.025
0 to 0.1
Tin (Sn), % 0
2.0 to 3.5
Zinc (Zn), % 0
7.0 to 9.5