monel k 500 cold drawn monel alloy pipe

K-500 Special alloy materials metallurgy quality requirement is very high, in order to obtain high quality alloy, alloy composition must be accurate control and reduce the alloy of gases, harmful inclusions and non-metallic inclusion content to improve the purity of alloy,

Specification

Chemical composition

Mechanical properties:(Minimum value at 20°C)

MONEL alloy K-500 (UNS N05500/ W.Nr. 2.4375) is a nickel-copper alloy which  combines the excellent corrosion resistance of MONEL alloy 400 with the added advantages of greater strength and hardness.

The increased properties are obtained by adding aluminum and titanium to the nickel-copper base, and by heating under controlled conditions so that submicroscopic particles of Ni 3 (Ti, Al) are precipitated

throughout the matrix. The thermal processing used to effect precipitation is commonly called age hardening or aging. The composition of the alloy is given in Table 1. Typical applications for MONEL alloy K-500
products are chains and cables, fasteners and springs for marine service; pump and valve components for chemical processing; doctor blades and scrapers for pulp processing in paper production; oil well drill
collars and instruments, pump shafts and impellers, non-magnetic housings, safety lifts and valves for oil and gas production; and sensors and other electronic components.

The Monelk500 heat treatment

annealing treatment can be used to soften metal matrix after processing or to dissolve aging hardening phase.Though the low temperature of 760 ° C to 871 ° C so range also can get enough softening effect, but in order to later age hardening can achieve the optimal effect, suggested that thermal annealing temperature of the product with 982 ° C, annealing temperature of the cold drawn products with 1038 ° C.At more than 982 ° C temperature, grain growth speed very fast, if it is need careful grain structure, you need to high temperature heat treatment of control to the shortest time.

In order to obtain the best aging reaction and the maximum softening result, effective water quenching should be carried out immediately after heat treatment.Failure to quench water immediately or slow quenching speed will result in the precipitation of some aging hardening phase and damage the aging reaction.Adding 2% (by volume) of alcohol to the water quenching liquid reduces oxidation and facilitates pickling.