Alloy Steel Seamless kav yog dav siv hauv cov roj av, kev lag luam roj ntsha, kev tsim kho hluav taws xob, kev tsim kho, kho mob, kho mob, kev tiv thaiv thiab hluav taws xob. P91 Alloy Steel yog siv nyob rau hauv kev lag luam muaj zog. Rau welded qauv, lub asme boiler thiab siab vessel code txwv cov pa roj carbon ntau dua 0.35%. Alloy cov hlau yog qhov zoo tagnrho rau cov ntawv thov uas yuav tsum muaj zog dua, ua rau muaj kev tiv thaiv hluav taws xob hlau qib.