On Monday, July 18, 2016 at 1:41:39 PM UTC-4, Ignoramus8242 wrote:
I have a few unopened cans of 8018 and 9018 welding rod.

Can I use them freely like I would 7018? They are stronger, is that
going to create any cracking?

7018 is a low hydrogen rod. If you do not keep it in a rod oven after opening the can, it will absorb water and cause cracks in high strength steel. But can be used on low strength steel like any rod with hydrogen.

My understanding is 8918 and 9018 are also low hydrogen rods. Can only be used on high strength steel if kept water vaper free, but can be used on low strength steel regardless.

Dan

On Mon, 18 Jul 2016 13:10:10 -0700 (PDT), "
wrote:

On Monday, July 18, 2016 at 1:41:39 PM UTC-4, Ignoramus8242 wrote:
I have a few unopened cans of 8018 and 9018 welding rod.

Can I use them freely like I would 7018? They are stronger, is that
going to create any cracking?

7018 is a low hydrogen rod. If you do not keep it in a rod oven after opening the can, it will absorb water and cause cracks in high strength steel. But can be used on low strength steel like any rod with hydrogen.

My understanding is 8918 and 9018 are also low hydrogen rods. Can only be used on high strength steel if kept water vaper free, but can be used on low strength steel regardless.

Dan

Check Hobart:

http://www.hobartbrothers.com/produc...6reg%3B+8018C3

....oor Lincoln Electric:

http://www.lincolnelectric.com/en-us...libur8018-B2MR

Compare the elongation figures.

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Ed Huntress

On Mon, 18 Jul 2016 13:10:10 -0700 (PDT), "
wrote:

On Monday, July 18, 2016 at 1:41:39 PM UTC-4, Ignoramus8242 wrote:
I have a few unopened cans of 8018 and 9018 welding rod.

Can I use them freely like I would 7018? They are stronger, is that
going to create any cracking?

7018 is a low hydrogen rod. If you do not keep it in a rod oven after opening the can, it will absorb water and cause cracks in high strength steel. But can be used on low strength steel like any rod with hydrogen.

My understanding is 8918 and 9018 are also low hydrogen rods. Can only be used on high strength steel if kept water vaper free, but can be used on low strength steel regardless.

Dan

Absolutely correct.

8018 is 80,000 pound weldment strength
9018 is 90,000 pound weldment strength

and of course we know that the "18" (last 2 digits typically indicates
low hydrogen electrodes (rods)


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