heat treating 1008 sheet steel 1

[goyo1]

hello
I have some brackets made of 1008 cold roll steet .020 thick sheet .. I need to have them heat treated to 40 -45 Rc
does any one know the procedure? just need to have some spring back on them...
need temp settings
time and cooling procedure...
thank you

 

[SwinnyGG]

Don't specify a procedure- specify an end condition, and let your heat treating shop figure it out.

 

[weldstan]

You are not going to get there from a simple Q&T heat treatment - not enough carbon.

 

[EdStainless]

Not with 1008, you won't reach that hardness.
I doubt that it will make RC40 even just quenched without a temper.

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P.E. Metallurgy, Plymouth Tube

 

[metengr]

Cold roll the sheet material versus heat treatment.

 

[EdStainless]

This sheet could be cold rolled to your strength level, then formed, and perhaps given a low temp stress relief


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P.E. Metallurgy, Plymouth Tube

 

[goyo1]

thanks you all for the feed back..
is there any way I can make these bkts act as if there were made from spring steel..
here's the problem,, the parts should had been made from spring steel .020-C1075 ROCKWELL HARDNESS C43-46
and they were made from .020 1008 cold roll steel..
thank for your help

 

[weldstan]

It appears that you cannot additionally cold form the 0.020" sheet if the thickness must be maintained. You would need about a 30% cold reduction to achieve the hardness. If you received the wrong grade of material, why didn't you reject it and get the appropriate material?

 

[EdStainless]

If for some reason you had to use these I suppose that they are thin enough to carburize through.
This is not recommended since you will have little control over the final properties.

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P.E. Metallurgy, Plymouth Tube

 

[goyo1]

Thanks... The material was stock pilled and many months went by and could not return it ...

if carburize is the only option I guess we can try it and see what happens, the target hardness is not critical, since this is a light fixture bracket,
all we are trying to achive is a little spring back property,,,
thanks for the info..

 

[EdStainless]

The 'springiness' will be the same with any steel at the same thickness, strength has nothing to do with that.
Where the strength comes in is in how far you can bend it before it takes a set (yields).

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P.E. Metallurgy, Plymouth Tube

 

[metengr]

here's the problem,, the parts should had been made from spring steel .020-C1075 ROCKWELL HARDNESS C43-46
and they were made from .020 1008 cold roll steel..

Sorry, but you are stuck with non-conforming material, which cannot be used to provide properties like a 1075 steel. Use it on another project.