Carbon Equivelent Help

By JW Date 03-08-2009 20:35

   Mn Cr Ni Cu Mo

CE =%C+ (%0.65) + (%0.13) + (%0.19) + (%0.005) + (%0.07) C= 0.11
-    ------    -----    -----    -----    -----
6 5    15 14    4

Need help on the proper way to figure this equation out. The answer should be 0.28 but no matter how I add or divide the wrong answer keeps comming up.

By ctacker (****)

Date 03-08-2009 23:03

I got .274857142, rounded up .28
if you have a scientific calc. add using brackets. (.65/6) + (.13/5) + (.19/15) + (.005/14) + (.07/4) + .11 where / = divide

By Nanjing Date 03-09-2009 13:15 Edited 03-09-2009 13:28

CEV= C +Mn/6 +(Cr/5+Mo/5+V/5)+(Cu/15+Ni/15) I believe is the most common formula for calculating carbon equivalence. I made it 0.27

By Mikeqc1 (****)

Date 03-09-2009 16:01

I GOT .274

By welderbrent (*****)

Date 03-09-2009 18:23

JW,

If I remember right, when I was studying for the CWI test, there were a couple of the books with sample questions that did not have a correct answer for the question when using the equation exactly like they had it posed.

Annex I; I5 has the formula differently than how you show it. D1.3 has it even different yet.

One thing to remember, if testing, use the formula as they give it to you in the question. If using for work, use the one out of the code and the section (clause) that applies to what you are working on.

And, I too, came up with 0.2748; depending upon how many decimals you went out and how you rounded= 0.28

Have a Great Day, Brent

By the way, WELCOME to the forum. Hope we are helping.

By JW Date 03-11-2009 00:47

I finally came up with 0.274857!!!!!!!!!!!!! I thought perhaps I was doing something wrong but it seems I was pushing the wrong buttons or not................... Glad to know everyone else got the same answer. Taking my CWI this Saturday. Thanks for the input.

JW