ALOY 904L • UNS N08904 • WNR 1.4539

UNS NO8904, ti a mọ nigbagbogbo bi 904L, jẹ kekere carbon giga alloy austenitic alagbara, irin eyiti o jẹ lilo pupọ ni awọn ohun elo nibiti awọn ohun-ini ipata ti AISI 316L ati AISI 317L ko pe.

Ipilẹṣẹ bàbà si ipele yii fun ni awọn ohun-ini sooro ipata ti o ga ju awọn irin alagbara nickel chrome mora, ni pataki si imi-ọjọ, phosphoric ati acetic acids. Sibẹsibẹ, lilo lopin wa pẹlu awọn acid hydrochloric. O tun ni atako giga si pitting ni awọn solusan kiloraidi, resistance giga si awọn mejeeji crevice ati idaamu ipata wahala. Alloy 904L ṣe dara julọ ju awọn irin alagbara irin austenitic miiran nitori ilọpo giga ti nickel ati molybdenum.