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Alloy 200 nickel pipe is made from commercially pure wrought nickel, with good mechanical properties, excellent resistance to many corrosives.
Typical applications include a variety of processing equipment, particularly to maintain product purity in handling foods, synthetic fibers, and alkalies.
Stock Size Range:Specifications:ASTM B 161, ASME SB161
Nickel 200 and Nickel 201 are solid solution strengthened, commercially pure wrought materials with good mechanical properties over a wide range of temperatures and excellent resistance to many corrosives, in particular hydroxides. Nickel 201 was a modification of 200 to control carbon (.02 max) which keeps it from being embrittled by intergranular precipitates at temperatures of 600 F to 1400 F in many processes. Typically, the elemental restrictions of both, nickel 200 and nickel 201, are combined into one, dual-certified chemistry resulting in a single alloy with the desired characteristics of both alloys, Nickel 200/201.
In what forms is Nickel 200/201 available at K.M Steel?
What are the characteristics of Nickel 200/201?
Both Nickel 200 and 201 offer corrosion resistance in reducing and neutral media as well as in oxidizing atmospheres provided that the oxidizing media allows the formation of a passive oxide film. This oxide film accounts for the materials excellent resistance in caustic environments. Corrosion rates in both marine and rural atmospheres are very low. The resistance of Nickel 200/201 to corrosion by distilled and natural waters is excellent. Plus it also gives excellent service in flowing sea water even at high velocity, but in stagnant or very low-velocity sea water severe local attack may occur under fouling organisms or other deposits. In hot water systems where the steam contains carbon dioxide and air in certain proportions, corrosion rates will be initially high but will decrease with time if conditions favor the formation of a protective film.
Nickel 200 is normally limited to service at temperatures below 600 F. At higher temperatures Nickel 200 products can suffer from graphitization which can result in severely compromised properties. When operating temperatures are expected to exceed 600 F, carbon content becomes critical. The lower carbon content of Nickel 201 makes the material resistant to graphitization and therefore less subject to embrittlement. Nickel 200 & 201 are approved for construction of pressure vessels and components under ASME Boiler and Pressure Vessel Code Section VIII, Division 1. Nickel 200 is approved for service up to 600 F while Nickel 201 is approved for service up to 1230 F. Melting point is 2615-2635 F.
| Annealed | 1000 psi | Mpa |
| Yield Strength (0.2% offset) | 15 min psi | 105 |
| Tensile Strength | 55 min psi | 380 |
| Elongation % in 2 inches | 35 |
UNS 32750 Duplex Stainless Steel Specification
Importer, Stockholder, Supplier and Exporter's of UNS 32750 Duplex Stainless Steel Pipes & Tubes in India
DUPLEX 2205
ASTM A 182, A 240, A 276, A 789, A 790, A 815UNS S31803, S32205NACE MR0175Forms of Duplex 2205 Available at K.M STeel India
SheetPlateBarPipe & Tube (welded & seamless)Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)Welding Wire and Welding ElectrodeStainless Steel 22052205 Duplex Overview
Duplex 2205 is a nitrogen enhanced duplex stainless steel that was developed to combat common corrosion problems encountered with the 300 series stainless steels. Duplex describes a family of stainless steels that are neither fully austenitic, like 304 stainless, nor purely ferritic, like 430 stainless. The structure of 2205 duplex stainless steel consists of austenite pools surrounded by a continuous ferrite phase. In the annealed condition, 2205 contains approximately 40-50% ferrite. Often referred to as the work horse grade, 2205 is the most widely used grade in the duplex family of stainless steels.
The advantage of a duplex structure is that it combines the favorable qualities of a ferritic alloy (stress corrosion cracking resistance and high strength) with those of an austenitic alloy (ease of fabrication and corrosion resistance).
Usage of 2205 Duplex stainless steel should be limited to temperatures below 600 F. Extended elevated temperature exposure can embrittle 2205 stainless.
Corrosion Resistance
2205 duplex stainless steel is a cost effective solution for many applications where the 300 series stainless steels are susceptible to chloride stress corrosion cracking. Stress corrosion cracking occurs when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides. Increasing temperatures also increase the susceptibility of stainless steels to stress corrosion cracking.
Benefits of UNS32750 Super Duplex Stainless Steel
Crevice CorrosionThe presence of crevices, almost unavoidable in practical constructions and operations, makes stainless steels more susceptable to corrosion in chloride enviroments. 2507 is highly resistant to crevice corrosion. The critical crevice corrosion temperatures of 2507 and several other high-performance stainless steels are shown above.
| C | Cr | Ni | Mo | N | Others |
| 0.020 | 25 | 7 | 4.0 | .27 | S=0.001 |
Milap Jain (K. M. Steel India)
122/C, GOHRA GANDHI BUILDING, 1ST FLOOR, OFFICE NO.37, 8TH KHETWADI BACK ROAD, MUMBAI, Maharashtra - 400004
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