The main conclusions in this 《study on servicing properties of boiler tubes made from 18-8 type austenitic stainless steel》 have been briefly presented

including mainly the influence of changing regularity of micro-structure

the variation of mechnical behavior

the variation of structural properties in the servicing process of boiler tubes made from austenitic stainless steel

as well as the difference in manufacturing process of boiler tubes made from the said steel

upon safety in the survicing period.Study shows that as in the following:along with the lengthening of servicing term

the δ-phase in matirials will be graduall separated out

enbritlement of materials will be appear

and the anti-corrosion ability will reduce

moreover

improper solid-solution process may result in cracking in operation

in the event of destress process being not carried out

the risk of stress corrosion may be increased;during the time of welding

attention should be paid to control of the line energy consumption and the cooling speed.