Rolls-Royce Archives
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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).
Material specification sheet detailing chemical composition and heat treatment procedures.

Identifier  ExFiles\Box 153\2\  scan0136
Date  15th October 1936 guessed
  
X1300

Carbon .10 to .20 %
Sulphur .04 max.%
Phosphorous .04 max.%
Chrome .75 to 1.1%
Nickel 2.75 to 4%
Manganese .2 to .5%
Silicon .3 max.%

Carborise at 880°C.
Cool in box.
Quench in oil from 880°C.
Quench in oil from 780°E.{Mr Elliott - Chief Engineer}
Temper for 20 minutes at 200°C.
  
  


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