HITACHI CLOSES THE GAP

INTEREST in tin powder for powder metallurgy is growing; not only does it find a place in non‐ferrous powder metallurgy, as in sintered porous bronzes used for bearings, but it is valuable as a sintering acid in ferrous powder metallurgy. Work at the Tin Research Institute demonstrates the advantages of small additions of tin powder in iron‐copper‐tin compacts for reducing the sintering temperature and increasing the dimensional stability and wear resistance. Tin powders are beingused worldwide for this purpose and not least in Japan.