Steel EN 10083/C45 (DIN 17200)

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

Hi folks.. is the steel EN 10083/C45 (DIN 17200) suitable for crankshaft and cylinder sleeve in the IC engines?

 

Regards Jens Eirik

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

[macmarchParticipant @macmarch]

Hi Jens,

 

It is always difficult to specify a particular grade of material for a particular job.

So much depends on the stresses involved, the operating environment, running temperatures, lubrication etc. As far as I can see C45 is a quench and temper type of steel and if you cannot control that process then problems could arise.

I would go for something like this

EN10083-1, DIN CK40, 1.1186, C40E, EN8

For the sleeves you can’t beat a cast iron liner. A steel piston in a steel bore is a non starter.

 

A good source of info for IC engines would be any of the IC Engine magazines.

 

cheers

 

Ray

[Johan van ZantenParticipant @johanvanzanten]

Hi Jens Eirik,

 

I agree with Ray, but you can use C45 un hardened for crankshafts, camshafts and gears. Be carefull with (hard) soldering C45 parts.

For cylinders I always use cast iron with cast iron or aluminium pistons and C.I. rings.

 

Success with your engine.

 

 

Regards, Johan.

Edited By Johan van Zanten on 25/08/2011 18:57:00

[Ramon WilsonParticipant @ramonwilson3]

Hi Jens,

 

I would also like to add that it may depend on the size and type of engine. I have not used C45 but from what I have just checked on it’s a high carbon steel with a high tensile strength. It may actually be ‘overkill’ for your application. What type of engine is it and how will it be used.

If you have a source of C45 it (ie it might be free) for me it would depend on a couple of factors – does it machine well to a high finish or does it need to be heat treated and ground to obtain such. Personally I’m not in favour of the latter without the right equipment though I do know people who case harden and just lap with success

 

I have used so far EN24t for crankshafts. This turns well and providing the tool is sharp for the final cuts will give a very good surface finish which can then be lapped/honed/polished to a high degree. It is a very tough resilient steel ideal for the purpose.

 

I have made liners from cast and high tensile steel using cast iron pistons. Both materials lapped very well but the steel liner gave a better seal. The last engines used readily obtained EN1a – a free cutting mild steel – for the liners again with a cast piston. I did not get the lapped surface finish (visually) as I did with the high tensile steel but the quality of fit of piston to liner was as good as could be wished for and has improved considerably with running. How long that will continue remains to be seen but I would certainly use that combination again. These were all diesel engines so required good piston/liner fits.

Obviously it is a much easier material to work especially when cutting ports in and I have not noticed any distortion after machining. Some commercial engines have used this combination and I think you will find the Meketmyer brothers used it on their world beating high performance team race engines.

 

Hope this helps a bit more

 

Regards – Ramon

Edited By Ramon Wilson on 25/08/2011 20:18:41

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

I has maked the crankshaft of din17200/C45 with good results. I wrote about the material was suitable for the crankshaft and cylinder since i has builded the engines with used parts from car. When i turned the steel, the swarf is short, surface not very good, the steel is a bit hard to turn in nice finish. Better results with high rpm and slow feeding speed and light cut. Grinding with sandpaper gave good finish. Overall diameter and length is checked with micrometer and trimmed with sandpaper. I do not have toolpost grinder. See the pic of engine in avatar.

 

Before i used the material for the crankshaft and the cylinder from used drive shaft from front wheel drive car. The steel was annealed to make it machinable at the lathe. Some time steel from torsion spring from suspension. Never hardened the steel before use in the engine, no problem since i am using castor oil in the engine. My engines are running on bronze or aluminium bearing.

 

I am allways using cast iron as piston material running on cylinder of steel, the cast iron came from used cam shaft or brake disc.

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