By: powerandpassion - 28th June 2017 at 09:42
Something like this but you would need to get your crankshaft (US or UK made?) analyzed for a definite answer. Generally class SAE 33XX, nickel chromium steel alloy, in the case of Merlin, nitrided.
By: TonyT - 25th June 2017 at 17:50
You could contact the RR historical branch, but whether they would give you the exact material spec is another question.
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June 24, 2017 at 2:28 pm