steel round dimensions

[C12carbon]

Hello.
I am designing a threaded shaft that allows, through the manual drive of a flyer, the closure of a shutter of a valve used for liquid transport. the dimensions of the shaft are: diameter 18 mm and height 200 mm approximately, and I chose a carbon steel c40. Now I would like to ask you, what are the commercial dimensions of the semi-finished steel rounds, from which, through processing to the lathe, can I get my tree and waste less material possible? a company advised me to start from a 30 mm diameter round and length 6 m, but is it possible that to obtain a diameter of 18 mm I have to remove more than 1/3? there are smaller dimensions and especially how much they cost per kg or per meter?
Thank you for your answers
cordial greetings
C

 

[SHIREN]

Hello.
I am designing a threaded shaft that allows, through the manual drive of a flyer, the closure of a shutter of a valve used for liquid transport. the dimensions of the shaft are: diameter 18 mm and height 200 mm approximately, and I chose a carbon steel c40. Now I would like to ask you, what are the commercial dimensions of the semi-finished steel rounds, from which, through processing to the lathe, can I get my tree and waste less material possible? a company advised me to start from a 30 mm diameter round and length 6 m, but is it possible that to obtain a diameter of 18 mm I have to remove more than 1/3? there are smaller dimensions and especially how much they cost per kg or per meter?
Thank you for your answers
cordial greetings
C

Hi.
exists in trade dia.18 in various tolerances even in h7
for lengths the standard bar is 3 m
in the workshops we go to 304
Thank you.

 

[robertorepetti]

I agree with shiren regarding the choice of the material.

 

[PierArg]

Hello.
I am designing a threaded shaft that allows, through the manual drive of a flyer, the closure of a shutter of a valve used for liquid transport. the dimensions of the shaft are: diameter 18 mm and height 200 mm approximately, and I chose a carbon steel c40. Now I would like to ask you, what are the commercial dimensions of the semi-finished steel rounds, from which, through processing to the lathe, can I get my tree and waste less material possible? a company advised me to start from a 30 mm diameter round and length 6 m, but is it possible that to obtain a diameter of 18 mm I have to remove more than 1/3? there are smaller dimensions and especially how much they cost per kg or per meter?
Thank you for your answers
cordial greetings
C

Hi.
6m for 200 mm? You sure you didn't get it wrong?
Isn't that maybe they told you that that's their minimum order?

often happens so

 

[C12carbon]

thanks for the answers!! !
cmq to respond to pierarg, 6 m is the minimum length of order and of course I have to cut the round to get pieces of 200 mm; what I meant was that it seemed strange to start from a diameter of 30 to get one of 18!!! Thanks shiren, but I think that an aisi 304, recommended for the valves to saracinesca, is oversized for mine, which already has the body designed with a poor steel feg400. at most I could put an 18nicrmo5 which has better resistance characteristics, although little, than the c40. and then, as you know, the inox is more complicated for the processing and the cost difference of the realization does not play in my favor.
C

 

[maxopus]

thanks for the answers!! !
cmq to respond to pierarg, 6 m is the minimum length of order and of course I have to cut the round to get pieces of 200 mm; what I meant was that it seemed strange to start from a diameter of 30 to get one of 18!!! Thanks shiren, but I think that an aisi 304, recommended for the valves to saracinesca, is oversized for mine, which already has the body designed with a poor steel feg400. at most I could put an 18nicrmo5 which has better resistance characteristics, although little, than the c40. and then, as you know, the inox is more complicated for the processing and the cost difference of the realization does not play in my favor.
C

mah ... you're going to look for a special steel (from the acronym would still seem like a martensitic stainless steel) for a vulgar pin.
What do you need a material that does in a few, when you find 304 avalanches and therefore at more competitive prices?
If all standard valve manufacturers use 304 a reason will be there, don't you think?

 

[SHIREN]

mah ... you're going to look for a special steel (from the acronym would still seem like a martensitic stainless steel) for a vulgar pin.
What do you need a material that does in a few, when you find 304 avalanches and therefore at more competitive prices?
If all standard valve manufacturers use 304 a reason will be there, don't you think?

hello max
It can also be a fetifying pin like you say
but in the shutters it is used to put the inox
costera a few 1/2 € more
unlike the merging pump and you choose the most appropriate material
The perne fetus is considered a moving organ
and you must not intax
indeed it opens and closes the valve:wink:
Good day

 

[maxopus]

hello max
It can also be a fetifying pin like you say
but in the shutters it is used to put the inox
costera a few 1/2 € more
unlike the merging pump and you choose the most appropriate material
The perne fetus is considered a moving organ
and you must not intax
indeed it opens and closes the valve:wink:
Good day

hi enzo... but in fact I have argued that 304 is more than good, I do not understand why to go looking for a little diffused stainless steel.

 

[C12carbon]

hi enzo... but in fact I have argued that 304 is more than good, I do not understand why to go looking for a little diffused stainless steel.

It is true that 304 is very widespread but as I said it is difficult to work. the advantage of 18nicrmo5 (which is not a stainless steel and at least is not uncommon) is that it is modeled very well; and then, if you just do not have to rust, nitride or paint it. In principle it costs me less and less. then it is not the fact of that 1-2 €, extra to kg. the problem is that I gave it to piles of this stuff and then summarizing you reach exorbitant figures.
in any way I thank you for the answers.
cordial greetings.
C

 

[SHIREN]

It is true that 304 is very widespread but as I said it is difficult to work. the advantage of 18nicrmo5 (which is not a stainless steel and at least is not uncommon) is that it is modeled very well; and then, if you just do not have to rust, nitride or paint it. In principle it costs me less and less. then it is not the fact of that 1-2 €, extra to kg. the problem is that I gave it to piles of this stuff and then summarizing you reach exorbitant figures.
in any way I thank you for the answers.
cordial greetings.
C

Hello 12...
It's not like that.
At least as I see it
if you buy an adjusted smooth dia 18 h11-h7-ecc
you just need to fill it up and create the picture for the crank graft
The operation is the same time I know those
but you have a superior product
Thank you very much

 

[sampom]

I'll tell you something.
but why not start directly from threaded bar? (or do you need a particular thread? rather you can also use a life without end trapeze, commercial).
in stainless steel or not you find them beautiful and ready to cut to size and especially with "commercial" length of 1 meter.

when possible you try to avoid work.

greetings
Marco:smile: