From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Requesting information on Invar steel, coefficient of expansion for various alloys, and soldering methods for stainless steel.
| Identifier | ExFiles\Box 154a\1\ scan0015 | |
| Date | 11th November 1918 | |
| To EFC. from R.{Sir Henry Royce} c. to CJ. c. to EH. c. to Mr. Hall. X.3407.-RE "INVAR" STEEL. There is a metal called Invar which has a temperature coefficient expansion of practically nil. I have one or two applications of this in mind. Will you kindly find out what its composition is, probably it is very like the resistance alloys for electrical work, which have a very low coefficient change of resistance, due to change of temperature. Can you find out the relative coefficient of expansion of several modern materials, i.e. Stainless, Quick-Step, H.{Arthur M. Hanbury - Head Complaints} piston alloy, and ordinary piston alloy. Again referring to Invar, one thinks of Walls of Sheffield as being likely people. One form I want it in is about ¼" diameter rod 40" long. Can we obtain Stainless in sheet metal, have we any such sheet and does it solder well? I have used "Fluxite" for soldering and have got the impression that it is the well known chloride of zinc and resin melted up together, therefore really no better than ordinary "killed spirits" of the plumber, because one thinks that the resin would not prevent corrosion in a damp place. The solder you sent was just the correct proportions. Kindly let me know all you can find out about the above. Mr. Hall would probably have some data. R.{Sir Henry Royce} | ||