STAINLESS AND DUPLEX STEEL FASTENERS

Stainless and duplex steel fasteners are critical for high-corrosion, high-strength applications in industries like oil/gas, chemical processing, and marine environments.

Common grades include 304/304L (general corrosion resistance), 316/316L (enhanced pitting resistance via molybdenum), and 17-4PH (precipitation-hardened for strength up to 1000 MPa). Available as bolts, nuts, screws, washers, and studs per ASTM A193/A194, sizes M3-M56. They offer tensile strengths 500-800 MPa with good weldability.?

UNS S32750 (2507 super duplex) and S32205 (2205) feature dual-phase microstructure for superior pitting resistance (PREN >40) and yield strengths ?550 MPa (116 ksi min), elongation 15-25%, hardness ?310 Brinell. Specs cover ASTM A479/A182 F53/F51, with hex bolts, studs up to 200mm length.