A269 na-ekpuchi ma welded na enweghị nkebi igwe anaghị agba nchara maka izugbe ngwa ma ọ bụ na-achọ corrosion resistance na ala ma ọ bụ elu temp ojiji gụnyere 304L, 316L na 321. A249 na-welded naanị na-eji maka elu temp ngwa (ji esi mmiri ọkụ, okpomọkụ Exchanger).