Nickel 200

Chemistry*

Typical Inventory

Round Bar, Plate, Tubing, Pipe, Fastener

Applications

• Manufacture and handling of sodium hydroxide, particularly at temperature above 300 °C.
• Production of viscose rayon. Manufacturing of soap.
• Analine hydrochloride production and in the chlorination of aliphatic hydrocarbons such as benzene, methane, and ethane.
• Manufacturing of vinyl chloride monomer.
• Reactors and vessels in which fluorine is generated and reacted with hydrocarbons.

General Data

Nickel 200 has native properties to provide strong resistance to corrosion in acids and alkalis. It is especially useful under reducing conditions. The alloy has outstanding resistance to caustic alkalis, which includes its molten state. The alloy shows good resistance in acid, alkaline, and neutral salt solutions. However, in oxidizing salt solutions severe corrosion will occur. The Nickel 200 alloy is resistant to all dry gases at room temperature. In dry chlorine and hydrogen chloride, nickel alloy 200 may be used in temperatures up to 550 °C. Its resistance to mineral acids varies according to temperature, concentration, and solution aeration. Its corrosion resistance displays better in de-aerated acid.

Mechanical Properties

The typical properties listed can usually be provided in rounds, sheet, strip, plate, & custom forgings. We have the equipment to produce small quantities in special sizes to meet our customers’ specific needs. The table below shows Special Metals' Nominal Mechanical Properties of Alloy 200. For most common forms and exceptions, check out the datasheet linked underneath the table.

UTS = Ultimate Tensile Strength, YS = Yield Strength, OS = Offset, HF = Hot Finished, CD = Cold Drawn, Ann. = Annealed, NA = Not Available, HRB = Rockwell Hardness B scale

Common Specifications

Note that the specifications listed are common for this alloy but are for reference only and may be specific to a certain form. The specifications listed are not comprehensive nor indicative of any edition, revision, or similar such as an amendment. Please, reach out to our sales department to request the Material Test Report (MTR) or to confirm your required specifications.

Machining

Nickel and cobalt based alloys can be difficult to machinine. However, it should be emphasized that these alloys can be machined using conventional production methods at satisfactory rates. These alloys harden rapidly, generate high heat during cutting, weld to the cutting tool surface and offer high resistance to metal removal because of their high shear strengths. The following are key points which should be considered during machining operations:

• CAPACITY - Machine should be rigid and overpowered as much as possible.
• RIGIDITY - Work piece and tool should be held rigid. Minimize tool overhang.
• TOOL SHARPNESS - Make sure tools are sharp at all times. Change to sharpened tools at regular intervals rather than out of necessity. A 0.015 inch wear land is considered a dull tool.
• TOOLS - Use positive rake angle tools for most machining operations. Negative rake angle tools can be considered for intermittent cuts and heavy stock removal. Carbide-tipped tools are suggested for most applications. High speed tools can be used, with lower production rates, and are often recommended for intermittent cuts.
• POSITIVE CUTS - Use heavy, constant, feeds to maintain positive cutting action. If feed slows and the tool dwells in the cut, work hardening occurs, tool life deteriorates and close tolerances are impossible.
• LUBRICATION - lubricants are desirable. Soluble oils are recommended especially when using carbide tooling.

Terms and Conditions

References

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