Nickel 201 N02201 2.4068 Pure Alloy Pipe & Tube

Nickel 201 alloy is a commercially pure wrought alloy having properties similar to that of nickel 200 alloy, but with a lower carbon content to avoid embrittlement by inter-granular carbon at high temperatures.

It is resistant to acids and alkalis, and dry gases at room temperature. It is also resistant to mineral acids depending on the temperature and concentration of the solution.

Good resistance to corrosion in acids and alkalis and is most useful under reducing conditions.

Outstanding resistance to caustic alkalis up to and including the molten state.

In acid, alkaline and neutral salt solutions the material shows good resistance, but in oxidising salt solutions severe attack will occur.

Resistant to all dry gases at room temperature and in dry chlorine and hydrogen chloride may be used in temperatures up to 550C.

Resistance to mineral acids varies according to temperature and concentration and whether the solution is aerated or not. Corrosion resistance is better in de-aerated acid.

Nickel 201 can be hot formed to almost any shape. The temperature range 1200°F to 2250°F is recommended and should be carefully abided as the proper temperature is the most important factor in achieving hot malleability. Full information of the forming process should be sought and understood before proceeding.

Nickel 201 can be cold formed by all conventional methods, but because nickel alloys have greater stiffness than stainless steels more power is required to perform the operations.

Nickel 201 is the low carbon version of Nickel 200. It is preferred to Nickel 200 for applications involving exposure to temperatures above 600°F. With low base hardness and lower work-hardening rate, it is particularly suited for cold forming.

INTERNATIONAL STANDARDS
Country	Material	Pipe/Tube	Sheet/Plate	Bar/Rod	Fitting	Forging
USA ASTM	UNS N02201	B161	B162	B160	B366	B564
Germany DIN	2.4068	17751	17750	17752	–	17754
UK BS	NA 12	3074	3072	3076	–	–

Applications

The following are the list of applications of nickel 201 alloy:

Manufacture and handling of sodium hydroxide, particularly at temperature above 300C.

Production of viscose rayon. Manufacture of soap.

Analine hydrochloride production and in the chlorination of aliphatic hydrocarbons such as benzene, methane and ethane.

Manufacture of vinyl chloride monomer.

Reactors and vessels in which fluorine is generated and reacted with hydrocarbons.

Caustic evaporators

Combustion boats

Electronic components

Plater bars.

Chemical Composition

The chemical composition nickel 201 alloy is outlined in the following table.

Element	Content (%)
Nickel, Ni	≥ 99
Iron, Fe	≤ 0.4
Manganese, Mn	≤ 0.35
Silicon, Si	≤ 0.35
Copper, Cu	≤ 0.25
Carbon, C	≤ 0.020
Sulfur, S	≤ 0.010

Other Designation

Other designations that are equivalent to nickel 201 alloy include the following:

ASME SB-160 – SB 163

SAE AMS 5553

DIN 17740

DIN 17750 – 17754

BS 3072-3076

ASTM B 160 – B 163

ASTM B 725

ASTM B730

Physical Properties

The following table shows the physical properties of nickel 201 alloy.

Properties	Metric	Imperial
Density	8.89 g/cm3	0.321 lb/in3
Melting point	1435 – 1446°C	2615 – 2635°F

Mechanical Properties

The mechanical properties of nickel 201 alloy are displayed in the following table.

Properties	Metric	Imperial
Tensile strength (annealed)	403 MPa	58500 psi
Yield strength (annealed)	103 MPa	14900 psi
Elongation at break (annealed prior to test)	50%	50%

Thermal Properties

The thermal properties of nickel 201 alloy are given in the following table

Properties	Metric	Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F)	13.1 µm/m°C	7.28 µin/in°F
Thermal conductivity	79.3 W/mK	550 BTU.in/hrft².°F

Nominal Mechanical Properties of Nickel 201
Form	Condition	Tensile Strength Kpsi	Yield Strength (0.2% Offset) Kpsi	Elongation in 2″ (%)	Hardness
Rod and Bar	Hot Finished, Hot Finished and Annealed	50-60	10-25	60-40	75-100 Brinell
	Cold Drawn	60-100	35-90	35-10	125-200 Brinell
	Cold Drawn and Annealed	50-60	10-25	60-40	75-100 Brinell
Plate	Hot Rolled	50-70	12-25	60-35	—
	Hot Rolled and Annealed	50-70	12-35	60-40	—
Tube and Pipe*	Cold Drawn Annealed	50-70	10-28	60-40	62 Max Rockwell B
	Stress Relieved	60-105	30-85	35-15	70-95 Rockwell B

High Temperature Mechanical Properties of Annealed Nickel 201
Temp.°F	Tensile Strength, PSI	Yield Strength, PSI	Elongation,%	Reduction of Area, %
Room	58,500	15,000	50	73
200	56,100	15,400	45	74
400	54,000	14,800	44	72
600	52,500	15,300	42	72
800	41,200	13,500	58	80
1000	33,100	12,100	60	84
1200	22,200	10,200	74	90