Kfactor Value for Nickel Alloy 200

[J.Gibson]

Autodesk Inventor Professional 2011

Sheet Metal

I need to know the Kfactor to use for folding and unfolding Nickel Alloy 200 - 1/4 hard.

Can any one help me?

Jason Gibson

Eldre Corp.

Design Engineer / New Product Development

[mrattray]

That's not a question anyone here can really answer for you. There's many many variables involved with sheetmetal work. The best thing you can do is cut some sample parts, measure the blanks, bend them, and then measure the results and see how much material you're losing.

[mcgyvr]

No because K factor is actually equipment/process dependant.(air bending/bottoming,etc..)

Simply don't provide a flat pattern.. Let the sheet metal vendor provide you with parts that meet the formed drawing dimensions.

In my opinion flat patterns are only for in-house fabrication.. ie you KNOW the K factor because you just went back there and formed a piece on the press brake yourself or you already have a known K factor to use.

[dick_upton]

Jason,

They're right about this. Lots of factors. Your kfactor will be somewhere between 0.20 and 0.60, but only you can determine the kfactor for your application if you know how it is being bent, the thickness, etcetera.

Over the years, this guide has served me well man: www.ciri.org.nz/bendworks/bending.pdf

Read it thru, then have the supplier shear some 4x4 squares of the subject material, and have them bend it 90 degrees. Do more than one so you can average the numbers you measure. The guide will tell you how to get the right kfactor . . .

I hope this helps you.