1.4401 and 1.4404 are equivalent to 316L stainless steel‌. 1.4404 is the German DIN standard stainless steel, equivalent to the national standard 316L stainless steel.

410 stainless steel is a martensitic stainless steel with high hardness and strength, as well as good corrosion resistance.

1.4028 is a martensitic stainless steel with good machining properties and high corrosion resistance and polishing properties after heat treatment, as well as high strength and wear resistance. This material is particularly suitable for manufacturing plastic molds that bear high loads, high wear resistance, and are subject to corrosive media.

‌SUS420 tool steel (also known as 2Cr13) is a high-hardness, high-wear-resistant martensitic stainless steel known for its excellent cutting performance and good corrosion resistance‌‌.

410 stainless steel bar is a martensitic (high-strength chromium steel) stainless steel with good corrosion resistance and machinability. It is generally used as steel and cutting tool steel, and its UNS number is S41000.

304 is a common stainless steel material, the main components of which are 18% chromium and 8% nickel. 2B refers to the surface treatment method of stainless steel plate.