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).
Laboratory report on the cause of breakage in Nickel Steel Studs due to excessive hardness from overheating during descaling.
| Identifier | ExFiles\Box 95\2\ scan0259 | |
| Date | 9th May 1938 | |
| To BY.{R.W. Bailey - Chief Engineer} from H1/EJW. c. RHC{R. H. Coverley - Production Engineer}/EG. C. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} c. BY/NS.{Norman Scott} c. RHC{R. H. Coverley - Production Engineer}/Mr. W. Smith (Radiator Shop). ------------------------- H1/EJW.S/GS.9.5.38. M.1.595. LABORATORY. NICKEL STEEL STUDS G.73535. The hardness of the broken stud submitted was found to be 538 Brinell, which would account for the breakage. The studs could not be tapped in this condition, so it is evident that they must have been heated to an excessive temperature for the descaling operation which Mr. Smith (Radiator Shop) informs us is done prior to fluxing for tinning. Mr. Smith confirmed that this may have happened, and has already taken steps to prevent a recurrence of the trouble. H1/EJW. | ||