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C1008 temper pass CQ sheet 1

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imaz

Mechanical
Aug 14, 2003
15
Hi Folks.
Again I am coming to, I am sure, the right place to ask for assistance.We roll c1008 temper pass sheet using a CNC roller. The sheet vary between 72"x30" to 120" x 40".We are not able to get consistency on the radius from one end to the other. We need to find a site (beside ASTM) that gives us the yield stength and the modulus of elasticity of this material (or of any material if possible).
Any help is greatly appreciated.
Thank you.

Imaz

 
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For general information regarding material properties, go to Matweb:


The elastic modulus (Young's modulus) for steel is mostly invariant to alloying, so a value of 207 GPa is typically used. Yield strength is highly dependent on a number of variables, including chemical composition, thermomechanical process history, etc. You will not find one yield strength value for temper-passed 1008 steel. It is this reason, as well as the uncertainty in your CNC roll forming process (strain rate, lubrication, etc.) that causes variability in the radius. In order to solve or mostly solve this problem, you should specify the minimum and maximum yield strength of the product you purchase, and then have the supplier certify that this range has been met.
 
Temper passed material is made from a hot finished band which originally was coiled. Depending on the thickness the the sheet will have some coil memory in it, .375 and thicker from past experience and depending on the strength. The coil memory may be impacting your radius by either reducing or increasing the bending. Hot bands have varying physical properties from start of the band to the center to the end due to different cooling rates. CQ means the requirements for your plate or sheet is the loosest you can purchase so variations from plate to plate could be very high. Hopes this helps. Good Luck
 
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