The composition of A335 P91 material contains carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, vanadium, nitrogen, nickel, aluminum, niobium, titanium and zirconium. Ho na le mefuta e 'meli ea liphaephe tse se nang litsi le liphaephe tse ling. Phala e se nang letho e tsoa ho low e le 'ngoe ea lintho tse fumanehang, ha phala e sa sebeliseng e se e felisitsoe ke ho hlonepha kapa pampiri. Welding e ka ba bofemo kapa khale ho tloha pheletsong e le 'ngoe ho isa ho e' ngoe ho hlahisa tube. Boikarabello bo tlase ba phala ke 415Ma le matla a fokolang a metso e tlase ke 585mpa.