ASTM ASME SB160 Alloy 201 UNS N02201 Bar

ASTM ASME SB160 Alloy 201, also known as UNS N02201, is a commercially pure (99.6%) nickel alloy closely related to Alloy 200 (UNS N02200). It exhibits excellent resistance to corrosion, particularly in reducing environments. When supplied in the form of bars, Alloy 201 can be used in various applications where resistance to corrosion and excellent thermal and electrical conductivity are essential. Here are some details about Alloy 201 bars:

Grade Name:

DIN: 2.4068

JIS: NW 2201

EN: Ni99.2

ASME: SB 160, UNS N02201

Elemental Composition:

Nickel (Ni): 99.0% min

Carbon (C): 0.02% max

Iron (Fe): 0.40% max

Manganese (Mn): 0.35% max

Silicon (Si): 0.35% max

Copper (Cu): 0.25% max

Sulfur (S): 0.010% max

Mechanical Properties (Typical values for annealed condition):

Tensile Strength: 55 ksi (380 MPa) min

Yield Strength (0.2% offset): 15 ksi (105 MPa) min

Elongation: 40% min

Hardness: 75 HRB max (Rockwell B scale)

Application Range:

Chemical processing: Equipment for handling corrosive acids and alkaline solutions.

Electrical industry: Components for electrical resistance heating, including heating coils and electrical conductors.

Marine industry: Components for seawater applications, such as heat exchangers and condensers.

Aerospace industry: Components for aircraft engines and airframes where resistance to corrosion and conductivity are required.

Food processing: Equipment for handling food products, such as cookware and food processing machinery.

Manufacturing Process:

Alloy 201 bars are typically manufactured through processes such as hot rolling, cold drawing, or hot forging. Annealing may be applied to relieve internal stresses and improve machinability.

Quality Control:

Material testing for chemical composition and mechanical properties.

Non-destructive testing (e.g., ultrasonic testing, radiographic testing).

Dimensional inspection.

Surface inspection.

Pressure testing (if applicable).

Other Common Types:

In addition to bars, Alloy 201 is available in various other forms such as sheets, plates, pipes, tubes, fittings, and welding wire.

Common Q&A:

Q: Can Alloy 201 withstand high temperatures?

A: Alloy 201 has limited high-temperature strength compared to other nickel alloys. It is typically used in applications where temperatures do not exceed 600°C (1112°F).

Q: Is Alloy 201 weldable?

A: Yes, Alloy 201 is weldable using conventional welding techniques. It's recommended to use matching composition filler metals to ensure the integrity of the weld joint.

Q: What are the corrosion resistance properties of Alloy 201?

A: Alloy 201 offers excellent resistance to various corrosive environments, including acids, alkaline solutions, and seawater. However, it is susceptible to attack by oxidizing acids and halogens.

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