Hot section strength, oxidation resistance, creep life and fastener capability — these are the grades the turbine industry specifies, and they are the grades ROBAN machines.
UNS N06002, DIN W. Nr. 2.4665
Turbine combustor parts, transition ducts and hot section hardware. Excellent oxidation resistance and good fabrication characteristics.
UNS N06625, DIN W. Nr. 2.4856
Combustor components, seals and duct hardware. Retains strength to 816 °C and resists chloride corrosion.
UNS N07718, DIN W. Nr. 2.4668
High-strength fasteners, shafts and rotating hardware through the 700 °C range, with good ageing characteristics.
UNS N06635
Combustor components and seal rings with excellent thermal stability and low thermal expansion.
UNS R30188
Combustion cans, transition ducts and afterburner components in military and commercial aero gas turbines.
UNS N07750, DIN W. Nr. 2.4669
Gas turbine discs, rings and high-strength fasteners where creep strength at elevated temperature is critical.
UNS S66286, DIN W. Nr. 1.4980
High-temperature fasteners and springs retaining strength above 600 °C.
Above roughly 600 °C the failure mode is no longer yield strength but creep. Below it, oxidation and corrosion dominate. The grade in the drawing reflects that calculation — and we machine what the drawing specifies.
Bolt material is a common failure point. We supply high-temperature fasteners in the nickel and superalloy grades matched to the joint temperature and the creep life required, as studs, bolts or assembled bolt sets.
Fastener enquiry