Waɗannan baƙin ƙarfe ne masu ɗauke da chromium mai girma (tsakanin 18 da 28%) da matsakaicin adadin nickel (tsakanin 4.5 da 8%). Abubuwan da ke cikin nickel bai isa ba don samar da cikakken tsarin austenitic kuma sakamakon haɗuwa da tsarin ferritic da austenitic ana kiransa duplex. Yawancin karafan duplex sun ƙunshi molybdenum a cikin kewayon 2.5-4%.
Abubuwan asali
- Babban juriya ga damuwa lalata fatattaka
- Ƙara juriya ga harin ion chloride
- Ƙarfin ƙarfi mafi girma da ƙarfin samarwa fiye da austenitic ko ƙarfe na ƙarfe
- Kyakkyawan weldability da tsari
Amfanin gama gari
- Aikace-aikacen ruwa, musamman a yanayin zafi kaɗan
- Desalination shuka
- Masu musayar zafi
- Kamfanin Petrochemical