9018 rod ?'s

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Hey guys.  I found some 9018 rod laying around in the shop the other day.  My instructor wasnt to sure about it.  He said it may have been a military rod.  It says 9018, then it has a small black band around it then it has the numbers 2076.  What does that mean.  I used the rod today and it makes a pretty nice weld and it's very stong.  I only got to use it in the flat and vertical up.  Works real well in the vertical.By the way..this may be my first post but im on this site all the time.  Its a wonderful forum.  Ive learned alot.  Im only 17 and welding is something I love to do.  I do it everyday in school.  I get a pass out of study hall to go to the welding shop.  Im really hoping to make a career out of it.
Reply:If it were a military rod their would be an "M" designating so. We use 8018-B2 = 1 1/4 chrome, and 9018-B2 2 1/4 chrome for our boiler tube in the superheater section of our coal fired boiler at the generating station. The alloying elements in these particular rods complement the heat resistant characteristics of boiler tube Chorm-moly. Using these rods generally require heat treatment process's. A particular auxillery steam line that i replaced a section in : 4" sch 160, procedure called for Tig root with 9018-B2 filler, and 9018-B2 stick fill/cap with a 14hr heat treatment process afterward with a soak temperature of 1350 for one hr and brought down 200* every hour thereafter, haha trust me once you get into 5000 psi of super heated steam the quality control goes through the roof ! But you can tell what alloying elements are in the rod by reading the number after the rod designation 9018-XXXX, and "M" stand for millitary "N" for neuclear etc etc.
Reply:Originally Posted by 99trxriderHey guys.  I found some 9018 rod laying around in the shop the other day.  My instructor wasnt to sure about it.  He said it may have been a military rod.  It says 9018, then it has a small black band around it then it has the numbers 2076.  What does that mean.  I used the rod today and it makes a pretty nice weld and it's very stong.  I only got to use it in the flat and vertical up.  Works real well in the vertical.By the way..this may be my first post but im on this site all the time.  Its a wonderful forum.  Ive learned alot.  Im only 17 and welding is something I love to do.  I do it everyday in school.  I get a pass out of study hall to go to the welding shop.  Im really hoping to make a career out of it.
Reply:90 ksi and 2 1/4 chrome as said above.  You'll see them used for higher strength/temperature tube and pipe that has 2-1/4" chrome.  8018 is 1-1/4 chrome and used on like materials.  I also work at a coal fired power plant and we use often in superheat and reheat sections as well as steam line and high energy piping.  It's fine to practice with but don't use for critical items on plain old carbon steel-instead use 7018.E9018 B3 used for 2-1/4 chrome P5A  T-22, P22, F22, etc.E9018 B9  used for 9% chrome P5B  T-9 Similar to ER70 ER80 and ER90 tig wire.
Reply:It has an M after 9018 and then it says 2076. This got moved.  I dont know where too? sorry guys. didnt realize where I was posting.
Reply:Well that then states its a Military quality rod, not sure of what use, maybe ship repairs, I suppose they'd be after the corrosion resistance of the 9018.. im not too awful sure what 2076 designates though.
Reply:Run it like 7018 and don't think to hard.Disclaimer; "I am just an a$$hole welder, don't take it personally ."
Reply:Yep thats what i do. Just like a 7018.  Could someone explain this rod to me.  Whats it main purpose.  Is it just like a 7018 but stronger?  What does the B with the number mean that Pressure_welder was reffering to?  Ive never seen that.ThanksTom
Reply:Originally Posted by tmcglaughlinhhhmmmm sounds like someone i know perhaps warren central high school?
Reply:Originally Posted by 99trxriderYep thats what i do. Just like a 7018.  Could someone explain this rod to me.  Whats it main purpose.  Is it just like a 7018 but stronger?  What does the B with the number mean that Pressure_welder was reffering to?  Ive never seen that.ThanksTom
Reply:9018 is just a higher strength version of 7018.  The chemistry of the flux coating on the rod is different.  It contains additional alloying ingredients that act to produce a stronger weld.  Generally speaking 9018 has better mechanical properties, but you need to match the filler metal to the base metal being welding.  Somebody else alluded to this.  If you use high strength fillers on low strength base metal you can run into problems with cracking in the HAZ during cooling.  Higher strength filler metals tend to be less ductile, which can also cause problems.Somebody posted earlier about one possible application for these rods.  These high strength steels are often found in power generation equipment.  They can be used in high pressure piping and pressure vessels found in boilers Originally Posted by 99trxriderYep thats what i do. Just like a 7018.  Could someone explain this rod to me.  Whats it main purpose.  Is it just like a 7018 but stronger?  What does the B with the number mean that Pressure_welder was reffering to?  Ive never seen that.ThanksTom
Reply:General description of the numbering for SMAW (stick) electrodes for carbon steels:First two digits (or three digits in 5 digit numbers) are the minimum tensile strength in 1000's of PSI. 7018 is 70000PSI minimum. 6010 is 60000PSI minimum. And so onThird digit specifies allowable positions for welding. If a rod is used in an positions not intended, the properties are likely mot going to meet spec. Generally, it is pretty tough to achieve even a decent weld in in an improper position. Most common are a 1, all position (ex: 6010, 7018, etc), and  2 is flat of horizontal. The most common '2' is 7024, often called jet rod. VERY fast fill, available in large sizes, high current, smooth, easy. I can sleep running these flat.Last digit specifies the flux composition. (see the referenced chart for details.) There isn't 100% consistency in this digit between position classes, and in many charts, the last two are listed together.The addendum (such as B3 or C1 or B3L or....) specifies additional alloying elements. These are defined in the AWS standards, and there is a wide variety of designators. These are common to all of the carbon steel electrode types (mostly), but there are a few that are special to a particular type. One addendum that is useful to know for 7018 is the -1 (7018-1). This specifies that the filler meets specified notch hardness requirements at lower temperature then standard 7018 (-50degF rather than -20degF)Low hydrogen rods also have a diffusable hydrogen specification. 7018H4 means that properly stored and used rods will have at most 4ml diffusable hydrogen per 100g of weld deposit. This is very important in situations where hydrogen induced cracking is an issue (kindergarten summary is thick sections, higher carbon steels, and certain alloy steels)Other filler metal types (stainless, aluminum) have different schemes that meet the special properties and requirements of these materials.Note that many of the carbon steel alloys contain chromium, manganese in moderate levels, and other alloy elements that are hazardous, and care must be taken to avoid breathing the fumes. Low exposures are generally not an issue for most of these, but routine exposure is.Protect yourself. Good ventilation (and an appropriate, properly fit respirator, if needed) is your friend.References: http://www.lincolnelectric.com/knowl...sification.asp(a few questionable things, but mostly correct) http://stickweld.com/electrode/what-...ding-rod-mean/(has a list of many common fillers and the AWS and ASME specs for them, with F and A numbers) http://engstandards.lanl.gov/esm/wel...7-Att.1-R1.pdf
Reply:Thanks guys