201

Introduction

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.

The following section will discuss in detail about nickel 201 alloy.

Chemical Composition

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

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

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

Tensile strength (annealed)

403 MPa

Yield strength (annealed)

103 MPa

Elongation at break (annealed prior to test)

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

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

Applications

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

Caustic evaporators

Combustion boats

Electronic components

Plater bars.


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