Nickel Alloy 201 (2.4068, N02201, NA12)
Nickel 201 is a nickel alloy formulated for primary forming into wrought products. 2.4068 is the EN numeric designation for this material. NA12 is the British Standard (BS) designation. N02201 is the UNS number. And Nickel Alloy 201 is the common industry name.
It has the highest electrical conductivity among wrought nickels. In addition, it can have the lowest tensile strength and has the highest thermal conductivity.
The properties of nickel 201 include six common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare nickel 201 to: wrought nickels (top), all nickel alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
180 GPa 27 x 106 psi
Elongation at Break
4.5 to 45 %
Fatigue Strength
42 to 210 MPa 6.1 to 30 x 103 psi
Poisson's Ratio
0.31
Shear Modulus
70 GPa 10 x 106 psi
Shear Strength
270 to 380 MPa 39 to 55 x 103 psi
Tensile Strength: Ultimate (UTS)
390 to 660 MPa 56 to 95 x 103 psi
Tensile Strength: Yield (Proof)
80 to 510 MPa 12 to 74 x 103 psi
Thermal Properties
Curie Temperature
360 °C 680 °F
Latent Heat of Fusion
290 J/g
Maximum Temperature: Mechanical
900 °C 1650 °F
Melting Completion (Liquidus)
1450 °C 2630 °F
Melting Onset (Solidus)
1440 °C 2620 °F
Specific Heat Capacity
440 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
78 W/m-K 45 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
19 % IACS
Electrical Conductivity: Equal Weight (Specific)
19 % IACS
Otherwise Unclassified Properties
Base Metal Price
65 % relative
Density
8.9 g/cm3 550 lb/ft3
Embodied Carbon
11 kg CO2/kg material
Embodied Energy
150 MJ/kg 63 x 103 BTU/lb
Embodied Water
230 L/kg 28 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
25 to 130 MJ/m3
Resilience: Unit (Modulus of Resilience)
17 to 720 kJ/m3
Stiffness to Weight: Axial
11 points
Stiffness to Weight: Bending
21 points
Strength to Weight: Axial
12 to 20 points
Strength to Weight: Bending
13 to 19 points
Thermal Diffusivity
20 mm2/s
Thermal Shock Resistance
11 to 19 points
Alloy Composition
| Ni | 99 to 100 | |
| Fe | 0 to 0.4 | |
| Mn | 0 to 0.35 | |
| Si | 0 to 0.35 | |
| Cu | 0 to 0.25 | |
| C | 0 to 0.020 | |
| S | 0 to 0.010 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B725: Standard Specification for Welded Nickel (UNS N02200/UNS N02201) and Nickel Copper Alloy (UNS N04400) Pipe
ASTM B160: Standard Specification for Nickel Rod and Bar
ASTM B161: Standard Specification for Nickel Seamless Pipe and Tube
Welding Metallurgy and Weldability of Nickel-Base Alloys, John C. Lippold et al., 2009
ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys, Joseph R. Davis (editor), 2000
Engineering Properties of Nickel and Nickel Alloys, John L. Everhart, 1971
Nickel Alloys, Ulrich Heubner (editor), 1998
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015