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AISI 444 Stainless Steel vs. CR021A Copper

AISI 444 stainless steel belongs to the iron alloys classification, while CR021A copper belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AISI 444 stainless steel and the bottom bar is CR021A copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Elongation at Break, % 23
15
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 78
43
Tensile Strength: Ultimate (UTS), MPa 470
230
Tensile Strength: Yield (Proof), MPa 310
140

Thermal Properties

Latent Heat of Fusion, J/g 290
210
Maximum Temperature: Mechanical, °C 930
200
Melting Completion (Liquidus), °C 1460
1090
Melting Onset (Solidus), °C 1420
1040
Specific Heat Capacity, J/kg-K 480
390
Thermal Conductivity, W/m-K 23
380
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
98
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
99

Otherwise Unclassified Properties

Base Metal Price, % relative 15
31
Density, g/cm3 7.7
9.0
Embodied Carbon, kg CO2/kg material 3.4
2.6
Embodied Energy, MJ/kg 47
41
Embodied Water, L/kg 130
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
31
Resilience: Unit (Modulus of Resilience), kJ/m3 240
83
Stiffness to Weight: Axial, points 14
7.2
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 17
7.1
Strength to Weight: Bending, points 17
9.3
Thermal Diffusivity, mm2/s 6.2
110
Thermal Shock Resistance, points 16
8.1

Alloy Composition

Bismuth (Bi), % 0
0 to 0.00050
Carbon (C), % 0 to 0.025
0
Chromium (Cr), % 17.5 to 19.5
0
Copper (Cu), % 0
99.95 to 99.998
Iron (Fe), % 73.3 to 80.8
0
Lead (Pb), % 0
0 to 0.0050
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 1.8 to 2.5
0
Nickel (Ni), % 0 to 1.0
0
Niobium (Nb), % 0.2 to 0.8
0
Nitrogen (N), % 0 to 0.035
0
Phosphorus (P), % 0 to 0.040
0.0020 to 0.0070
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
0 to 0.015
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0.2 to 0.8
0