| 摘要 |
The invention relates to the use of a ferritic-austenitic stainless steel as construction material for components in the chemical industry, more particularly for components which will come into direct contact with caustic soda. Said steel is essentially consisting of, in weight -%: C ≤ 0,05 Si ≤ 0,8 Mn 0,3 - 4 N 0,2 - 0,6 Cr 28 - 35, pref. 29 - 33 Ni 3 - 10, pref. 3 - 7 Mo 1,0 - 4.0, pref. 1 - 3 Cu ≤ 1,0 W ≤ 2,0 S ≤ 0,010 Ce ≤ 0,2 and the remainder Fe with the unavoidable impurities. The steel is used for NaOH evaporators in form of tube, sheet, bar, welding material or casting. <IMAGE> |
