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Welding Rod #'s

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Shane

12-10-2003 17:39:11

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Just curious as to what the numbers on welding rod means. Was told once but that was in Highschool several years ago. I assume someone here knows, ya'll some smart fellas (and ladies) here. Thanks, Shane.

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kyhayman

12-10-2003 19:40:59

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Re: Welding Rod #'s in reply to Shane, 12-10-2003 17:39:11

As the first 3 numbers are covered, here's the listing from my AWS chart

4th digit

1 cellulose potassium ac or dc reverse or straight
2 titania sodium ac or dc straight
3 titania potassium ac or dc straight or reverse
4 iron powder(25%) titania ac or dc rev or straight
5 low hydrogen sodium dc reverse
6 low hydrogen potassium dc (either)
7 iron powder/iron oxide ac or dc (either)
8 iron powder low hydrogen dc rev/str or ac polarity and current settings are in order of preference

0: when 0 is used then coating and current are determined by 3rd digit. Eg: 6010 is a cellulose potassium used DC reverse.

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Shane

12-11-2003 09:10:18

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Re: Re: Welding Rod #'s in reply to kyhayman, 12-10-2003 19:40:59

So I understand the first 3 digits. First 2 are the tensile strength, and the third is the rod position (1-flat, vertical, overhead, horizontal; 2-flat and horizontal; 3-flat, vertical down, horizontal, overhead) And I understand that the last number tells the rod coating and the type of welder to be use in. Aside from the type of welder does it matter much on the coating material? And just how do you weld vertically and leave a nice bead, more heat-less heat, bottom up? I can weld nicely except vertically. Thanks everyone, Shane.

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Buzzman72

12-12-2003 07:37:01

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Re: Re: Re: Welding Rod #'s in reply to Shane, 12-11-2003 09:10:18

I know you're talking about stick welding, but I believe that my experience mig welding may help. When the company I work for sent us to a 5-day welding school (mig), they told us to always do our vertical welds from the top down, rather than starting at the bottom...said to watch the puddle (as always), and let gravity work FOR us, rather than against us...That advice made all the difference in the world in my vertical welds.

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kyhayman

12-11-2003 10:44:19

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Re: Re: Re: Welding Rod #'s in reply to Shane, 12-11-2003 09:10:18

Yes, makes a huge difference. The low hydrogen rods need to be warmed (or preheated). The high iron powder rods will be the smoothest, potassium coatings give a shallow penetration. Cellulose with help burn through paint, rust, and grease.

As a rule, I only use E6011, 1/8" rod for vert. welding on AC.

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Jon

12-10-2003 19:20:24

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Re: Welding Rod #'s in reply to Shane, 12-10-2003 17:39:11

Just to re-cap what the other guys said, the first two numbers on the rod has to do with its tensile strength, the third is the position and the last is the A-C and D-C rod polarity. The E in front of the four numbers is for "Electrode".
So 6011 and 6013 are both 60,000 pounds per square inch (PSI) or 60 kilopounds per square inch (KSI). The "1" is "position one - all position", and the last number has to do with the polarity, which i'm a little unclear of. 6011 spatters a lot, and I only use it for heavy thick steel welding, other wise I like 6013 for mild steel. Common mild steel such as wide flange beams has a tensile strength of 36 ksi (36,000 P.S.I.) "yeild" strength and a working strength of about 60 percent of yeild. Frames are generally made of stronger steel - more like 50 ksi. or higher.

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Gavin M

12-10-2003 23:49:42

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Re: Re: Welding Rod #'s in reply to Jon, 12-10-2003 19:20:24

Jon, A-36 is the most common structural grade of steel for plate and rolled shapes such as angle, channel, and wide flange. It is semi-obsolete in that most structural steel is produced to a CSA 44W chemistry, which is stronger with no compromises on ductility. 44W also meets A-36 specs. A-36 has a yield strength of 36 ksi min. and an ultimate tensile strength of 58ksi min./80 ksi max. A yield strength of 50ksi would imply a medium carbon steel or a low alloy steel, and this would require a specified heat treatment process in order to accomplish the required strength along with sufficient ductility to avoid cracking. Welding such steels requires careful pre & post weld heat treatment to avoid problems. I recently did a failure analysis on a low-alloy pintle hitch that had experienced a catastrophic failure; the towed air compressor separated completely from the towing truck & was destroyed. The failure was directly due to improper welding used to build up a worn area on the hitch. The weldment had underbead cracking from brittleness in the heat-affected zone. My understanding is that until recently, vehicle frames were made out of a cap or rim steel with very high ductility (to aid forming) and consequent lower yield strength. This makes a much more robust frame (for machinery) or unibody (for cars) than a high strength, thin, brittle frame section. With advances in robotics, it is now possible to heat-treat to high precision on an assembly line, so many manufacturers are building frames out of thinner, stronger steel, relying on the heat-treatment to provide adequate ductility. This saves a few pounds but sends many new cars & trucks to the scrap heap because of frames that are uneconomic to repair.

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Jon

12-11-2003 02:42:06

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Re: Re: Re: Welding Rod #'s in reply to Gavin M, 12-10-2003 23:49:42

Gavin - thanks very much for the comments. I have a broken hub flange from a wheel cast in the 30's for a John Deere B. If you have a chance, can you e-mail me directly and give me advice on the best method to weld? My e-mail address is funyfarm@ewol.com - Jon

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old

12-10-2003 18:30:50

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Re: Welding Rod #'s in reply to Shane, 12-10-2003 17:39:11

Well I can help with it a little like with 6011 the 60 means it has a strengh of 60,000 lbs and with 7014 is 70,000 etc. The other number means what typeof welder you can use and some other stuff also but I'm not sure about all of that other stuff. I just know I use 7014 with my AC welder and 7018 with my DC welder, I don't use 6011 for anything I like the stronger rod. And I use Ni rod nickel rod for cast iron welding

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Dave_Id

12-10-2003 18:38:09

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Re: Re: Welding Rod #'s in reply to old, 12-10-2003 18:30:50

....to add to what "Old" said, I believe 6010 is a rod used for dirty welding, and is high penetrating rod. 6013 is an all purpose rod, all posiotion, AC or DC.. Nice rod for all around welding of farm equipment....

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kennyp

12-10-2003 18:55:27

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Re: Re: Re: Welding Rod #'s in reply to Dave_Id, 12-10-2003 18:38:09

6010 .. DC only 6011... a deep penatrating rod, recomended for us farmers. But then my memory is getting old.

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