4J328

Other

4J328 / (4J34)

4J328 grade supplied by Shanxi Youte Steel (jlhsteel.net).

Chemical Composition (%)

C	0.03
SI	0.3
MN	0.5
P	0.02
S	0.02
NI	28.5
CO	19.5

Available Forms

Bar, Plate, Tube, Forging

Uses

Cobalt alloy with exceptional wear, galling and high-temperature corrosion resistance. Used in cutting tools, valve seats, dental and orthopaedic implants, gas-turbine parts.

Heat Treatment

Solution treated and aged (≈650–800 °C) for wear alloys; many Stellite-type grades are used as-cast or hardfaced.

Precautions

Very abrasive to tooling when hardfaced; machine in annealed condition where possible. Excellent galling resistance reduces need for lubrication.

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