Duplex Steel UNS S31803 Bolts

 Duplex Steel UNS S31803 Bolts are constructed from austenitic-ferritic stainless steel developed to be stronger and more corrosion resistant than 300 series stainless steel. It aids users in avoiding stress corrosion cracking, which is very common with 316 and 317 stainless steel. Duplex steel UNS S31803 bolts are made from a mixture of austenitic and ferritic alloys. The mix of these alloys makes the grade extra strong and resistant to various chemical procedures 

Duplex Steel UNS S31803 has been tested at room temperature under reverse bending stress in comparison to SS316.

Duplex Steel UNS S31803 changes from ductile to brittle at -50 degrees celsius and can also become embrittled at 300-1000 degrees celsius. Thus a temperature range of -50 degrees celsius to 300 degrees celsius is suggested. The embrittlement of S31803 bolts is caused by exposure to temperatures exceeding 300 degrees celsius and a reduction in corrosion resistance.

Duplex Steel UNS S31803 Bolts provide an enhanced corrosion solution to stainless, with better sulfide corrosion resistance, chloride pitting resistance, and crevice corrosion resistance than 317L. Duplex Steel UNS S31803 Bolts are resistant to chloride pitting and crevice corrosion thanks to a mixture of chromium, molybdenum, and nitrogen, making them ideal for maritime conditions, closed-loop water systems and some food processing applications. It's crucial to remember that pitting corrosion can be a problem in chloride solutions when oxidizing media is present. In these conditions, the Duplex Steel UNS S31803 Bolts material's passive (protective) layer may be damaged, resulting in localized pitting.

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