Chemical compositions Ni > 99.0

Ni > 99.0, C<0.02

Ni-31Cu-2Fe (S £ 0.024)

Ni-31Cu-2Fe-0.04S

Ni-30Cu-2Fe-0.6Ti-2.7Al

Ni-15Cr-8Fe

Ni-23Cr-8Fe-1.4Al

Ni-29Cr-9Fe

Fe-33Ni-21Cr

Ni-15Cr-7Fe-2.5Ti-1Nb-0.7Al

Ni-19Cr-17Fe-3Mo-0.9Ti-0.5Al-5.1Nb

Fe-25Ni-15Cr-1.3Mo-2.1Ti-0.3Al

Ni-28Mo-5Fe-2Co Ni-28Mo-4Fe-2Co-Low Si, Low C Ni-30Mo-2Fe-2Co-2Cr-2W-2Mn

Ni-17Mo-16.5Cr-4.5W-5.3Fe-0.3V

Ni-16Mo-15.5Cr-5Fe-3.7W-2Co

Ni-16Mo-16Cr-2Fe-1.5Co

Ni-21Cr-13.5Mo-4Fe-3W-2Co

Ni-21.5Cr-9Mo^Fe

Ni-21.5Cr-9Mo^Fe

Ni-21Cr-16Mo-4Fe-3.7W-1.2Al

Ni-23Cr-15.7Mo-1Fe-0.3Al

42Ni-21.5Cr-25Fe-3Mo-2.2Cu-0.9Ti

Allox-system

Alloy no.

Features

Commercial pure Ni. Applicable in caustic solution below 315 0C Low C commercial pure Ni. Applicable in caustic solution above 315 0C

Applicable to the components for sea water, salt unit, crude distillation, etc.

Free machining grade of Alloy 400

P. H. version of Alloy 400, up to 600 0C. Applicable to pump-shaft, impellers, scrapers, etc.

Excellently resistant to in chloride SCC. Applicable to structural materials Excellently resistant to high-temperature oxidation. Applicable to oxidation-resistant parts Excellently resistant to many corrosive aqueous media, etc. Applicable to structural materials Highly resistant to high-temperature oxidation. Applicable to components for high-temperature use

Typical P. H. Ni-based alloy. Applicable to parts which need high tensile, creep and creep rupture properties Higher strength level than Alloy X-750. Applicable to parts which need high tensile, creep and creep rupture, etc. Age-hardenable alloy. Good strength and oxidation resistance up to 700 0C Excellently resistant to hydrochloric acid. But, weak to solutions with mixing of oxidant Improved on corrosion resistance in heat affected zone after welding of Alloy B

Minimized fabrication problems for Alloy B-2. Not applicable to the environment with ferric or cupric salt Excellent high resistance to oxidation, corrosion in chlorine, compounds with chlorine, oxidizing acid, etc.

Improved on fabricability and long range aging characteristics of Alloy C

Advanced Alloy B. Superior corrosion resistance to oxidizing environment compared to Alloy B

Improved on corrosion resistance of Alloy C-276 in oxidizing environment

High creep rupture strength and high resistance to corrosion and pitting in oxidizing environment Improved on low cycle fatigue properties and cold formability of Alloy 625

High Cr content of Alloy C-276. Excellent resistance to SCC, pitting and crevice corrosion in aggressive media Pure Ni-Cr-Mo alloy. Excellent corrosion resistance and thermal stability

Improved on aqueous corrosion resistance in a wide variety of corrosion media, modified by Alloy 800

Figure 7 Nickel-based alloy systems and theirfeatures (dotted line: reference material, P. H.: precipitation hardened). In nuclear power plants, several of these nickel-based alloys have been applied or are suitable as materials for various components, pipes, tubes, and other parts. The main applications or candidates of nickel-based alloys for various nuclear reactors are summarized in Table 2.