steel c45 difference with s275

[gil]

I asked for the construction of turned steel pieces s275jr as standard uni en 10025-2.
the turning machine offers me steel c45.

What is the difference between these materials? the characteristics of the c45 are analogous or superior to the s275jr?

the pieces are not soldered, they will be used as pins. will be strongly stressed, but the parts will not be moving.

 

[cacciatorino]

I asked for the construction of turned steel pieces s275jr as standard uni en 10025-2.
the turning machine offers me steel c45.

What is the difference between these materials? the characteristics of the c45 are analogous or superior to the s275jr?

the pieces are not soldered, they will be used as pins. will be strongly stressed, but the parts will not be moving.

the definition of c45 should guarantee you the chemical composition, that s275 instead the yielding load (if I don't remember bad).

typically "c*" steels are intended for heat treatment but very often, as your lathe has proposed, are used for parts to work at m.u. consistently, because they deform less and then they will be a little less sensitive to wear (and, in your case, to engraving) once in operation.

In theory I think there would be no reason to use a "fe..." instead of a "c..." when thermal treatments are not foreseen, but I see that the practice in design is to use steels of that type for parts strongly pressed mechanically, that then stress happens during exercise or during mechanical processing little matter.

 

[MBT]

The turning machine, all in all, is not really wrong.
first, more than a s275 would be more appropriate an e355. I say this because according to en10025 , the steels "s" are for structural uses (carpenteries) while the "e" are for mechanical constructions
above this, a c45 (which you can already use normalized without additional thermal treatments) has mechanical characteristics much higher than a s275/e355. machinability is good, but weldability is not as good.
it is not so hard to become fragile but it resists much better than a s275.

 

[gil]

Thank you for your confirmation.

 

[meccanicamg]

c45 is material with rm and rs greater than s275. even not certified at the same diameter the minimum conditions are higher. if you have monodiameter it is advisable to rectified bar c43 which is in h7.

 

[Teo-77]

Bye to all,
below I mark my experience on agricultural machinery:

- for main trees subject to high stresses I used 38ndc4 or more correctly designated as 38nicrmo4
- for secondary trees with minor stresses using c40 or c45
- s275 should correspond to the old designation fe430 and personally I used it only for plates to be laser cut and then to be folded and welded but never on trees and/or pins.

so I feel very correct the previous interventions, which confirm the initial advice of the lather to use a c45. cherry on the cake would be a heat treatment of reclamation. during purchase you can opt for a rounded h11 or a rectified in h7, both already rectified so as to avoid a passage.

 

[320i S]

personally the s235jr I have always used it as material for parts and contour assemblies, for nothing stressed and of poor mechanical/functional value, already when the volumes were interesting, I replaced it with the s355 to uniform the crude.

for any other use, I have always used materials that are much more noble and suitable for the situation/cost/numbers.