It wears far less. Also, steel of an earlier era is much better than that available today. I understand that the builders of the new loco that Rolls Royce are doing much of the work on, found that the characteristics of samples of original steel as used in similar engines, could not be matched by todays steels. alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx www.alanstepney.info Model Engineering, Steam Engine, and Railway technical pages. ----- Original Message ----- From: <peter.chadwick@xxxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Friday, October 15, 2004 4:21 PM Subject: [modeleng] Re: unknown thread Which leads to another question: would a plain cast iron cylinder ( and for that matter steam chest) suffer relatively little wear because of the graphite inclusions providing lubrication, or does it wear faster than a lubricated steel lienr? Peter Chadwick (soon to be on a 'plane home!) MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.