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CC381H Copper-nickel vs. ASTM A387 Grade 21 Steel

CC381H copper-nickel 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 CC381H copper-nickel and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 140
190
Elongation at Break, % 20
21
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 52
74
Tensile Strength: Ultimate (UTS), MPa 380
500 to 590
Tensile Strength: Yield (Proof), MPa 140
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 240
260
Maximum Temperature: Mechanical, °C 260
480
Melting Completion (Liquidus), °C 1180
1470
Melting Onset (Solidus), °C 1120
1430
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 30
41
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.8
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 40
4.1
Density, g/cm3 8.9
7.9
Embodied Carbon, kg CO2/kg material 5.0
1.8
Embodied Energy, MJ/kg 73
23
Embodied Water, L/kg 280
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 60
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 68
140 to 320
Stiffness to Weight: Axial, points 8.6
13
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 12
18 to 21
Strength to Weight: Bending, points 13
18 to 20
Thermal Diffusivity, mm2/s 8.4
11
Thermal Shock Resistance, points 13
14 to 17

Alloy Composition

Aluminum (Al), % 0 to 0.010
0
Carbon (C), % 0 to 0.030
0.050 to 0.15
Chromium (Cr), % 0
2.8 to 3.3
Copper (Cu), % 64.5 to 69.9
0
Iron (Fe), % 0.5 to 1.5
94.4 to 96
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0.6 to 1.2
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 29 to 31
0
Phosphorus (P), % 0 to 0.010
0 to 0.025
Silicon (Si), % 0 to 0.1
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.025
Zinc (Zn), % 0 to 0.5
0