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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).
Discrepancy in the yield stress specification for barrel steel and the potential rejection of supplied barrels.

Identifier  ExFiles\Box 176\3\  img122
Date  18th June 1940
  
YC

Ve. From Rm.{William Robotham - Chief Engineer}

Rm.{William Robotham - Chief Engineer}5/ML.18.6.40.

Ve.1/CD.18.8.40. With reference to your Memo. we note what you say about the barrel steel requiring to have a minimum yield of 50 tons but on the other hand, we would point out that you have had a copy of Cgh{W Clough}/EM.8/Wt.26.6.40. in which the specification for the barrel steel is quoted as being a yield stress of 45/50 tons per sq. ins.

The sixty barrels which have been supplied have been made to this specification and therefore it seems probable that some of them will have a yield of less than 50 tons.

I have asked Cgh{W Clough}/EM to let me have the figures, which will be submitted to you, with a view to seeing whether any of the barrels ought to be rejected.

Rm.{William Robotham - Chief Engineer}
  
  


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