metal corrosion-resistant materials, as opposed to non-metallic corrosion-resistant materials, metal corrosion-resistant materials are mainly iron-based alloys (corrosion-resistant stainless steel); nickel-based alloys (Ni-Cr alloy, Ni-Cr-Mo alloy, Ni-Cu alloy, etc.) reactive metals.

    Domestic grades of corrosion resistant alloys include: NS111, NS112, NS113, NS131, NS141, NS142, NS143, NS311, NS314, NS315, NS321, NS322, NS331, NS332, NS333, NS334, NS335, NS336, NS334, NS341 NS411, NS331, NS333, NS334, NS335, NS336, NS334, NS341, NS341, NS411, etc.; foreign grades of corrosion-resistant alloys include: incoloy800/800H, incoloy825, inconel600/690/625, Hastelloy B/B2/C/C-4, etc.