NICKEL ALLOYS - Nickel 400 (UNS04400)

Nickel and nickel alloys are non-ferrous metals with:

• High strength and toughness
• Excellent corrosion resistance
• Superior elevated temperature properties

Alloy 400 (UNS04400)

Characteristics

• Excellent resistance to chloride ion stress corrosion cracking.
• Good mechanical properties from subzero temperatures up to about 480C.
• Corrosion resistance in an extensive range of marine and chemical environments. From pure water to non-oxidizing mineral acids, salts and alkalis.
• This alloy is more resistant to nickel under reducing conditions and more resistant than copper under oxidizing conditions, it does show however better resistance to reducing media than oxidizing.
• Good resistance to sulphuric and hydrofluoric acids. Aeration however will result in increased corrosion rates. May be used to handle hydrochloric acid, but the presence of oxidising salts will greatly accelerate corrosive attack.
• Resistance to neutral, alkaline and acid salts is shown, but poor resistance is found with oxidizing acid salts such as ferric chloride.

Applications

1. Feed water and stream generator tubing
2. Brine heaters, sea water scrubbers in tanker inert gas systems
3. Sulphuric acid and hydrofluoric acid alkylation plants
4. Pickling bath heating coils
5. Heat exchangers in a variety of industries
6. Transfer piping from oil refinery crude columns
7. Propeller and pump shafts
8. Plant for the refining of uranium and isotope separation in the production of nuclear fuel.
9. Pumps and valves used in the manufacture of perchlorethylene, chlorinated plastics.
10. Monoethanolamine (MEA) reboiling tube.
11. Cladding for the upper areas of oil refinery crude columns.

Size ranges

• OD 6.0-89.0mm
• WT 0.5-8.0mm
• Up to 12 meters

The tubes are strictly implements the standard specification ASTM B161/ASME SB161, ASTM B163/ASME SB163, ASTM B167/ASME SB167.

NICKEL ALLOYS - Nickel 201 (UNS02201)

Nickel and nickel alloys are non-ferrous metals with:

• High strength and toughness 

• Excellent corrosion resistance

• Superior elevated temperature properties

Nickel 201 (UNS 02201)

Characteristics

• 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.
• Virtually immune to inter granular attack above 315C, chlorates must be kept to a minimum.
• In acid, alkaline and neutral salt solutions the material shows good resistance, but in oxidizing 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 deaerated acid.

Applications

• Manufacture and handling of sodium hydroxide, particularly at temperature above 300C.
• Production of viscose rayon. Manufacture of soap.
• Aniline hydrochloride production and in the chlorination of aliphatic hydrocarbons such as benzene, methane and ethane.
• Manufacture of vinyl chloride monomer.
• Storage and distribution systems for phenol - immunity from any form of attack ensures absolute product purity.
• Reactors and vessels in which fluorine is generated and reacted with hydrocarbons.

Size ranges

• OD 6.0 - 89.0 mm
• WT 0.5 - 8.0 mm
• Up to 12 meters

The tubes are strictly implements the standard specification ASTM B161/ASME SB161, ASTM B163/ASME SB163, ASTM B167/ASME SB167.