Wednesday, April 7, 2010

Re: [MW:4730] Oven backing on E7018R

The R is an optional designator in the AWS filler metal specification that allows for longer exposure times before rebaking. I believe it is 9 hours of exposure before having to return for a complete re-baking cycle.

The packaging will determine whether you can immediately use the electrode. If it is a hermetically sealed (also called vacuum sealed), you can use straight from the packaging. If it is a non-sealed package than you must bake the electrode the same as a non-R designated electrode.

The Lincoln Electric Company (Asia Pacific) Pte. Ltd.

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Sent from my BlackBerry wireless device

----- Original Message -----
From: Srinivas Engr [srinivas.gmsrini@gmail.com]
Sent: 04/06/2010 07:02 PM MST
To: "Materials & Welding" <materials-welding@googlegroups.com>
Subject: [MW:4726] Oven backing on E7018R

Dear All, May I know oven backing is need for E7018R(Moisture
resistant electrode)????, I am well with 7018 Backing, But whats with
E7018R????

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