This group is preferred for their outstanding corrosion and high temperature resistance. In order to enhance their corrosion resistance they contain very large amounts of nickel and/or chrome and molybdenum. They are used in extremely corrosive conditions in the energy, chemical and petrochemical industries. They are mainly used in hottest parts of gas turbines for power generation and aircrafts, turbine blades and jet/rocket engines, in marine industry, submarines, chemical processing industry and nuclear reactors.

NICKEL 200/201 UNS N02200/N02201, 2.4060/2.4066
Alloy 20 UNS N08020, 2.4660, Carpenter 20, 20Cb-3, Incoloy 20
Alloy C-276 UNS N102761, 2.4819, Hastelloy C-276
Alloy X UNS N06002, 2.4665, Inconel HX, Hastelloy X
Alloy C22 N06022, 2.4602, Hastelloy C-22
Alloy 400 UNS N04400 , 2.4360, Alloy 400, Monel 400
Alloy 800H / 800HT® UNS N08810/N08811, 1.4959, Alloy 800, Incoloy 800H/HT
Alloy 825 UNS N08825, Incoloy 825
Alloy 600 UNS N06600, 2.4816, Inconel 600
Alloy 625 UNS N06625, 2.4856, Inconel 625
Alloy 617 UNS N06617, NiCr23Co12Mo, 2.4663
Alloy 825 UNS N08825, 2.4858
2205 UNS S31803, S32205
SUPER DUPLEX 2507 UNS S32750, 1.4410, F53, SAF2507
SUPER DUPLEX ZERON 100 UNS S32760, 1.4501
LDX2101 UNS S32101, 1.4162