Technology Center > Grades Comparison Chart

Special nickel and precision expansion alloys follow UNS, W.Nr. and GB standards, leading to grade confusion during procurement and MTC checking. This page cross-matches all mainstream grades with three standard codes & density data, supporting drawing alignment, certificate verification and material cost budgeting.

Cross-check drawing grades like Alloy 825, Inconel 718, Hastelloy C276 via this table. Send grade & size to get stock specs, mill certificates and tailored quotations for plates, pipes, bars and forgings.

Beyond high-temp anti-corrosion nickel alloys, Fe-Ni precision expansion alloys serve electronic sealing and instrumentation parts, enabling grade verification for semiconductor, vacuum equipment and glass-to-metal sealing applications.

Grade Cross Reference Table Usage Guide：

• Drawing Matching Quickly convert overseas UNS / W.Nr. designations to domestic GB NS, GH and 4J grades to prevent wrong material orders.
• MTC Verification Cross-check factory mill certificates against three standard codes to avoid counterfeit or substitute materials.
• Material Selection Support Standard density data is included for pre-calculation of plate and pipe weight budgets.

Get Grade Based Quotation

GNEE STEEL maintains stock of all listed alloys. We offer full services: solution annealing, saw cutting, plasma cutting, NDT inspection, plus EN10204 3.1 / 3.2 certification. Our materials serve chemical, sour oil & gas, offshore and electronic sealing industries.