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7018 welding amps ? (Att: T Bone )

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Bill

01-29-2001 21:12:34

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At T Bones suggestion, I have been checking out the 7018 electrode. Problem is that if I weld on DC+ the amps will probable be around 120, since this is about the max for my Lincoln Buzzer the question is will a 7018 in AC weld as good as the DC rod ? Also have been reading where compared to the other rods it is a medium penetrating rod. Any takers on this subject ???? What about it T Bone !!!

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Nathan(GA)

01-30-2001 19:58:02

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Re: 7018 welding amps ? (Att: T Bone ) in reply to Bill, 01-29-2001 21:12:34

Hey Bill, check out the 7014. It's about like the 7018 with a little less flux. Seems to do better on a buzz box. I used to be a pipe welder and we used 6010 on the root pass and 7018 for the rest like T_Bone was talking about. But, this was using a Lincoln SA 250 diesel welder with much higher duty cycle. Like comparing a Cadillac to a VW. Have fun and protect your eyes, hands and all that other good stuff.

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T_Bone

02-01-2001 03:31:31

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Re: Re: 7018 welding amps ? (Att: T Bone ) in reply to Nathan(GA), 01-30-2001 19:58:02

Hi Nathan, I really never gave 7014 a thought but I bet it would run pretty well with the smaller machines.

We all have a VW tucked away somewhere :))))

T_Bone

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Nathan(GA)

02-01-2001 19:38:12

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Re: Re: Re: 7018 welding amps ? (Att: T Bone ) in reply to T_Bone, 02-01-2001 03:31:31

As a matter of fact, I have 3 VW's, only 1 running at the present. 3 extra engines. I'm looking for another rail buggy now. I missed a 1960 4-door VW truck this past week, already sold. You don't see them everyday.

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BFO

01-30-2001 20:11:00

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Re: Re: 7018 welding amps ? (Att: T Bone ) in reply to Nathan(GA), 01-30-2001 19:58:02

Nathan, read down below jimmyzz recommend Lincoln LH-73 7018 AC, might be worth a try. That way Bill could switch over to the AC side, and go with 1/8" and higher. Just a thought.

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BFO

01-30-2001 11:54:35

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Re: 7018 welding amps ? (Att: T Bone ) in reply to Bill, 01-29-2001 21:12:34

Bill, I must apologize, I reread my post and realized I made a mistake. Any weldment that's 3/8" and above should be preheated, at least enough to take the moisture out of the steel. I have done this from day 1, and my range of weldments are 1/16" to 4". Also, now that you've entered into the wonderful world of DC welding, you may come across a condition known as arc-blow. It is characterized by excessive splatter, poor weld, almost a gouging appearance, and can be remedied by changing the direction you're welding, or moving the ground clamp. You'll know when this happens, maybe Steve or Fred can explain it better.
Rule of thumb about 7018 flat weld amperages, 3/32" 100 amps, 1/8" 125 amps, 5/32" 150 amps. This is a good starting point and as every machine is different you'll have to play with it a bit. I have never had a use for 60xx series rods, but I know Fred is extremely knowledgable about them.

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T_Bone

01-30-2001 10:26:23

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Re: 7018 welding amps ? (Att: T Bone ) in reply to Bill, 01-29-2001 21:12:34

Hi, Bill, Depending on base metal thickness, Your more likely will be in the 130a to 140amp range of 1/8" ,7018 DCRP for flat work. You can drop down to 3/32" rod and be typical 90 to 100amps. What you might want to do before buying 50lbs of 1/8" or 3/32" rod, is to buy 5 lbs of each to see what runs best in your machine for your conditions.

7018 comparred to 6010. You can use 6010 to cut thru metal if you want to and couldn't with 7018 most of the time.
7018 will penetrate base metal just fine without cold lappping. 7018 is the best overall welding rod. If I was going to put in a pipe root weld and 6010 was available, I would use 6010, but I could also use 7018. In this example 7018 would be the more difficult rod at hand and 6010 would weld much easier for the root pass. Now that the root pass is in, then 7018 would be the best choice to finish the weld, but I could also use 6010. It's the application that determines the best suited electrode for the job.

Welding with SMAW (stick rod) requires NO base metal preheat. However if the welding machine and rod are not matched correctly, you could use preheat to help solve the problem on a temporary bases.

T_Bone

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BFO

01-30-2001 04:48:40

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Re: 7018 welding amps ? (Att: T Bone ) in reply to Bill, 01-29-2001 21:12:34

I've tried several 7018 electrodes, and have settled with the ARCWELD 528MR. Seems to work best for me. 120-125 amps for flat and overhead using 1/8" rod but try 3/32", then the amps go down to 100 or so. 7018 AC, in my opinion does not produce as smooth an arc as the DC, and I personally haven't used it in 10 years. As far as penetration goes, it's time well spent to do some edge preparation, and multiple passes. Preheat any material to be welded that's over 3/8" thick, and keep your rods free of moisture. HTH, nuther Bill, only from Ontario.

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