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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


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


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

Nickel (Ni)Ni 99 to 100
Iron (Fe)Fe 0 to 0.4
Manganese (Mn)Mn 0 to 0.35
Silicon (Si)Si 0 to 0.35
Copper (Cu)Cu 0 to 0.25
Carbon (C)C 0 to 0.020
Sulfur (S)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