Duplex Steel Steel

ʻO Duplex stainless steel grade 2205 (ʻike pū ʻia ʻo UNS S31803/S32205, ASTM A240 Type 2205, Inox 2205, AISI 318LN, SUS 329J3L, a i ʻole EN 1.4462) he ʻelua-phase (ferritic-austenitic2% alloying3%2% alloy). 2.5–3.5% molybdenum, 4.5–6.5% nickel, a ma kahi o 0.15% nitrogen. Hāʻawi kona microstructure kaulike i kahi hui kūʻokoʻa o ka ikaika kiʻekiʻe a me ke kūpaʻa corrosion maikaʻi loa. No ka laʻana, ʻoi aku ka maʻamau o ka papa 2205 ma kahi o ʻelua ʻelua o ka ikaika o ka 316L stainless steel, e ʻae ana i nā mea hoʻolālā e hoʻohana i nā ʻāpana ʻoi aku ka lahilahi a me ka māmā me ka ʻole o ka hana ʻana.

Hāʻawi maʻamau ka huila ma ke kūlana hoʻonā-annealed (ma ka ASTM A240/A240M) e mālama i kahi hale duplex kūpono. Paʻakikī ka papa 2205 mai nā mahana cryogenic (ma kahi o –50°C) a hiki i +300°C; Ma waho aʻe o kēia pae, hiki ke hana ʻia ka māhele sigma brittle i nā welds. Hana kēia mau waiwai i ka duplex 2205 i koho maikaʻi loa no ke koi ʻana i nā noi e like me ka hana kemika, ka aila a me ke kinoea waho, a me nā wahi kai kahi e koi ʻia ai ka ikaika kiʻekiʻe a me ke kūpaʻa chloride corrosion.