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ASTM A387 Grade 21 Steel vs. CC330G Bronze

ASTM A387 grade 21 steel belongs to the iron alloys classification, while CC330G bronze 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 CC330G bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
110
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 21
20
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 74
42
Tensile Strength: Ultimate (UTS), MPa 500 to 590
530
Tensile Strength: Yield (Proof), MPa 230 to 350
190

Thermal Properties

Latent Heat of Fusion, J/g 260
230
Maximum Temperature: Mechanical, °C 480
220
Melting Completion (Liquidus), °C 1470
1050
Melting Onset (Solidus), °C 1430
1000
Specific Heat Capacity, J/kg-K 470
430
Thermal Conductivity, W/m-K 41
62
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
14
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
15

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
29
Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 1.8
3.2
Embodied Energy, MJ/kg 23
52
Embodied Water, L/kg 62
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
82
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
170
Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 18 to 21
18
Strength to Weight: Bending, points 18 to 20
17
Thermal Diffusivity, mm2/s 11
17
Thermal Shock Resistance, points 14 to 17
19

Alloy Composition

Aluminum (Al), % 0
8.0 to 10.5
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 2.8 to 3.3
0
Copper (Cu), % 0
87 to 92
Iron (Fe), % 94.4 to 96
0 to 1.2
Lead (Pb), % 0
0 to 0.3
Manganese (Mn), % 0.3 to 0.6
0 to 0.5
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 0.2
Sulfur (S), % 0 to 0.025
0
Tin (Sn), % 0
0 to 0.3
Zinc (Zn), % 0
0 to 0.5