Duplex 2205 Stud Bolts
UNS S31803 · ASTM A182 F51 · EN 10204 3.1

Duplex 2205 is the most widely used duplex grade in EPC projects. It sits between standard austenitic stainless and Super Duplex in terms of cost and performance — which makes it the practical choice for the majority of process piping, heat exchangers, and pressure vessel flanges where corrosion resistance is needed but Super Duplex is over-specified.

We supply Duplex 2205 stud bolts to ASTM A182 F51 with matching A194 Grade 2HM heavy hex nuts. Available in all standard flange bolt lengths per ASME B16.5 and B16.47. Sizes from M8 to M56. EN 10204 3.1 mill certificates provided with every order. Ready stock maintained for fast dispatch.