Grace's Guide To British Industrial History

Registered UK Charity (No. 115342)

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,011 pages of information and 246,691 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Efco-Edwards Vacuum Metallurgy

From Graces Guide

1956 Joint venture company formed by Edwards High Vacuum and Efco to offer complete metallurgical installations[1]

1957 Developing a process to offer metals and alloys at a stage between true vacuum melting and simple degassing; useful for high quality castings of high alloys where it was impracticable to contain the mould in a vacuum[2]


See Also

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Sources of Information

  1. The Times, Jun 07, 1956
  2. The Times, Oct 23, 1957