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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 analysis report on the material composition and suitability of a crankshaft.

Identifier  ExFiles\Box 76\3\  scan0081
Date  20th November 1918
  
Mr Hives.
c to Works.

Laboratory.
H14/B201118.

Re Crankshaft 1108. Wyman & Gordon (?).

Analysis.

Carbon .41
Manganese .66
Chromium .89
Phosphorus .017
Sulphur .037
Nickel 1.27

From the analysis this steel is not, I consider, very suitable for crankshaft work, since it would either require water hardening or oil hardening at a higher temperature than desirable for crankshaft material. There were evidences of weakness in the vicinity of the fracture.

The brinell hardness was found to be 302. The fracture was not so fibrous as generally obtained with a higher percentage of Nickel.

JrClt
  
  


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