View
223
Download
0
Category
Preview:
Citation preview
8/13/2019 01B Non-Ferrous Material
1/13
Non-Ferrous MaterialWe will discuss about: Zinc (Seng) Copper (Tembaga) Nickel Aluminum
Including their properties and application in pipingcomponents.
The use of non-ferrous metals for other purpose (i.e.corrosion protection anode) may be discussedseparately.
8/13/2019 01B Non-Ferrous Material
2/13
Sharing & Discussion 2
DefinitionNon-ferrous: metallic material with non-iron basedchemical contents.Iron (Fe) does not share a major percentage in thechemical composition. Iron and Steel are not a memberof this group.
Advantages of Non-Ferrous compared to FerrousLight Weight (relatively).Corrosion Resistant in some environments where Iron
and Steel are attacked.
High electrical conductivity.Sometimes, price of non-ferrous product can be
cheaper.
8/13/2019 01B Non-Ferrous Material
3/13
Sharing & Discussion 3
ASTM Standard for Non-FerrousNon-Ferrous is specified in ASTM B Series. The material groupsare: Aluminum and Aluminum Alloys Cobalt Alloys Copper and Copper Alloys Nickel and Nickel Alloys
Zirconium Alloys Titanium and Titanium Alloys
Each material group has a standard for product specification:Castings, forgings, pipes, tubes, plates, fittings, etc.
Wrought Alloy: An alloy that is suitable for mechanical formingbe
low melting-point temperatures.
8/13/2019 01B Non-Ferrous Material
4/13
8/13/2019 01B Non-Ferrous Material
5/13
Sharing & Discussion 5
Hot dip galvanizing is the process of applying a zinc coating tofabricated iron or steel material by immersing the material in abath consisting primarily of molten zinc.
During galvanizing, the molten zinc reacts with the iron in the steelto form a series of zinc/iron alloy layers.
8/13/2019 01B Non-Ferrous Material
6/13
Sharing & Discussion 6
ASTM Standards for Galvanizing
A53/A53M-06 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and SeamlessA123/A123M-02 StandardSpecification for Zinc (Hot-Dip Galvanized) Coatings on Iron and SteelProducts
A123/A123M-02 Standard Specification for Zinc (Hot-Dip Galvanized)Coatings on Iron and Steel Products
A653/A653M-06 Standard Specification for Steel Sheet, Zinc-Coated(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-DipProcess
A780-01 Standard Practice for Repair of Damaged and Uncoated Areasof Hot-Dip Galvanized Coatings
A795/A795M-04 Standard Specification for Black and Hot-DippedZinc-Coated (Galvanized) Welded and Seamless Steel Pipe for FireProtection Use
A865-03 Standard Specification for Threaded Couplings, Steel, Blackor Zinc-Coated (Galvanized) Welded or Seamless, for Use in Steel PipeJoints
8/13/2019 01B Non-Ferrous Material
7/13
Sharing & Discussion 7
Copper and Its AlloysUnalloyed copper (Cu) is soft, ductile, easy for cold working.Most copper alloys can not be hardened by heat treatment.Hardening can be done with cold-working and solid solutionalloying. Adding Zn, Sn & Ni is intended for mechanicalimprovement.Copper itself has a corrosion resistance to ambient atmosphere,sea water and industrial chemicals.Application of copper and copper alloys is limited to temperaturesbelow the lower recrystallization temperature. Duringrecrystallization, copper becomes soft and tensile strength is
reduced.ASME Boiler and Pressure Vessel Code gives 208 o C as maximumtemperature for the use of copper alloy pipe and tubing. ASME B31also limits to this temperature for steam, gas and air piping.
8/13/2019 01B Non-Ferrous Material
8/13
8/13/2019 01B Non-Ferrous Material
9/13
Sharing & Discussion 9
8/13/2019 01B Non-Ferrous Material
10/13
Sharing & Discussion 10
Corrosion Problem in Copper Alloys Oxygen Differential Corrosion; caused by low flow rate (less
oxygen), being a location for corrosion Erosion Corrosion by abbrasive particles; can damage surface Stress Corrosion/Crack in environment containing ammonia salts
and mercury Copper alloys can be used in Acetate, Phosphate, Low
concentration H2SO4 and hydrochlorate acids.
Copper alloys can not be used in oxidizing acids, such as highconcentration H2SO4 acids.
8/13/2019 01B Non-Ferrous Material
11/13
Sharing & Discussion 11
Nickel and Its Alloys Nickel itself is tough, malleable, good resistance to
oxidation and corrosion, especially in basic (alkaline)environment. It has a high cost Nickel is often coated or plated on metal surface
which is susceptible to corrosion. MONEL is alloy with approximately 65 wt% Ni and28% Cu, having high strength & corrosion resistance.
Used for valve and other components which are incontact with some acid, sea water and petroleumsolutions.
In Blue Sky Project,Monel trim is used for valve inCorrosive Water
8/13/2019 01B Non-Ferrous Material
12/13
Sharing & Discussion 12
EXAMPLE OF MONEL CLASS
8/13/2019 01B Non-Ferrous Material
13/13
Sharing & Discussion 13
Properties: Low Density High electrical and thermal conductivity Resistant to corrosion in ambient atmosphere
and chemicals, except strong alkalis Easy to be attacked by galvanic corrosion Can form a protective oxide layer that can
prevent further corrosion
Aluminum
Recommended