El acero inoxidable 904L es un material de acero inoxidable austenítico de alta aleación y bajo contenido de carbono. El acero está desarrollado para su uso en soluciones no oxidantes como el ácido sulfúrico y también es adecuado para su uso en entornos neutros que contienen cloro (propensos a picaduras) y en entornos susceptibles a grietas y grietas por corrosión bajo tensión.
El 904L es un acero inoxidable austenítico monofásico con buena soldabilidad. Debido a su alto contenido de molibdeno y los consumibles especialmente diseñados de bajo contenido de impurezas, el metal de relleno, aunque austenita monofásica, evita el agrietamiento en caliente durante el proceso de soldadura.
904L cumple con los siguientes estándares: SS2562, DIN1.4539, ASTM N08904 y NFZ1 NCDU25-20.
Thermoforming:
This material is easy to thermoforming, but care must be taken to keep the thermoforming temperature between 950-1200 °C. Excessive temperature will reduce the forming ability of the steel, and the forming speed in the heating range will be accelerated.
If the final molding is carried out at a recrystallization temperature of, for example, 900 °C or higher and then rapidly cooled, it is generally not necessary to heat-treat after molding. It is also important to have the thermoformed workpiece as a whole at this temperature. In the case of local heating or local slow cooling of the case, after forming the need for heat treatment.
Cold forming:
904L has very good cold forming characteristics. Cold-formed, stamped and combined with other forming methods such as complex deep drawing can be used in product manufacturing.
The degree of cold forming and the final condition of the work piece determine whether the formed work piece needs to be annealed, for example annealing in the case of stress corrosion cracking.
Heat treatment:
904L is quenched and softened when heated to 1100-1150 °C, followed by accelerated cooling. In order to make the rapid cooling plate, if necessary, to accelerate the cooling water to cool.
