Building up rollers, Which rod?

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I had this question asked the other day and just thought I'd get another opinion.We are doing a job involving building up worn teeth on large steel gears and building up pads and rollers on a crawler crane. All steel.  Wouldn't you just use 7018 for this. I was asked if there was a different rod that might be better for building up these parts being that they are cast/poured parts vs. just your regular pipe or angle that comes out of the mill.I'd think you would just shine up the teeth etc with a grinder and build them up with good'ole 7018.What would you think?
Reply:In my opinion, I'd use 8018's. They are a bit harder and build better.Master Baiter
Reply:I worked a similar job where we had to build up on large gears for some mining equipment, they had some special rod for the buildup of those large gears.  I can't, for the life of me, remember what the rod was but it wasn't a xx18 rod.  You may want to do a little more research before proceeding.- If you can jump across it you can weld it!  - anonymous old boilermaker
Reply:Most of the hardfacing manufacturers supply a build-up rod/wire, the properties are quite a bit different, and more appropriate, under pressure, than 7018.   Unless it is a short-term, low use, or low-pressure application,,,,,,   I never use 7018 or any wire equivalent for building up.  7018 will tend to distort, deform, and squirt out under pressure,,,,   The buildup rods and wires will not.Best thing for a guy to do, in this case, is call or email the suppliers directly (Rankin, Stoody, Lincoln come to mind), they all have very competent people available, and any and all of these companies will give you excellent advice, for your situation, as long as you describe it accurately.  Most cases, if you give them the name and location of your LWS, they'll even put the order in for you.Last edited by mark8310; 03-13-2009 at 04:07 PM.
Reply:I agree with Mark.  Specific buildup rods/wire and capped with the appropriate hard surface is the way to go.I'm a Lover, Fighter, Wild horse Rider, and a pretty good welding man......
Reply:You left out McKay and Weldmold, and a few others. I've used McKay and Stoody rod.  Stoody's buildup works good.  I'm sure Lincoln's Buildup rod or wire is good too.  McKay, Stoody, and Lincoln all list products that are suitable for track pads, rollers, and gears.  There are different products suitable for each.  For best results, you'll probably end up with a different product for each type of part.  Some hardfacing products are best for metal to earth wear, and others are better suited for metal-on-metal wear, and still others are intended for use in high temperature environments.  One thing to keep in mind is that the buildup and hardfacing products can be grouped by the base metal they're deposited on:  those intended only for use on mild and low alloy steels, those intended for use on high manganese alloys('Hadfield Manganese Steels'), and those that can be run on both.  The selection of filler metals that work on both types of base metal alloys are limited, so don't go with a generic product unless you can't tell what the base metal is.If memory serves me correctly, the manganese steels are only slightly or non-magnetic, so they're easy to check for.  I've heard that they're used mostly on railroad equipment(rails, switchgear, etc) and on some excavation and mining equipment.  Another reason to hope what you're working on is not manganese steel is that there are strict preheat and interpass requirments for these steels. Originally Posted by mark8310Most of the hardfacing manufacturers supply a build-up rod/wire, the properties are quite a bit different, and more appropriate, under pressure, than 7018.   Unless it is a short-term, low use, or low-pressure application,,,,,,   I never use 7018 or any wire equivalent for building up.  7018 will tend to distort, deform, and squirt out under pressure,,,,   The buildup rods and wires will not.Best thing for a guy to do, in this case, is call or email the suppliers directly (Rankin, Stoody, Lincoln come to mind), they all have very competent people available, and any and all of these companies will give you excellent advice, for your situation, as long as you describe it accurately.  Most cases, if you give them the name and location of your LWS, they'll even put the order in for you.
Reply:The main point is,,,,,   these people,,,, know far more than we do, about specific applications.I remember once, calling,,,,  I think it was Mckay,,,,  a lady answered the phone.   "uh,,,,,  can you hook me up with somebody that can answer technical questions?????"  "What do you need to know?????, I can tell you"""" ......   I never ever made that mistake again,,,,,  that gal told me exactly what to do, where to lay it down, and how to do so.     She could put every one of all of us here, to shame......  and she weren't just reading out of a book, either.
Reply:looks like I need to do a little more in depth research here. i'll call around say lincoln and Mckay
Reply:You need to find out what type of steel the gear is. It does not matter what welding guru you call or how intelligent they are- if they do not know what kind of steel you are applying the weld too, they will not be able to help you. If you decide to "wing it" don't use any 6010 or 6011,these rods are garbage from the get go.Master Baiter
Reply:Agreed. Originally Posted by mark8310The main point is,,,,,   these people,,,, know far more than we do, about specific applications.I remember once, calling,,,,  I think it was Mckay,,,,  a lady answered the phone.   "uh,,,,,  can you hook me up with somebody that can answer technical questions?????"  "What do you need to know?????, I can tell you"""" ......   I never ever made that mistake again,,,,,  that gal told me exactly what to do, where to lay it down, and how to do so.     She could put every one of all of us here, to shame......  and she weren't just reading out of a book, either.
Reply:chadwickz71Make sure when you talk to who ever you talk to, that you know everything about the project. Don't guess, because these guys that you are going to talk to know just about everything you can think of. I ran into that problem on a project, They asked me what the base material was. I told them what i thought it was. They recomend a rod, i went to town on it. A couple of weeks go by and the darn thing busted out again. Call the sale rep, and he told me to make sure what the base material is. I found out what it was, and he send me another couple of rods and off i go again. This time it worked out. The base material was 41L40..  I told him 4140 the first time. How that little L made a big deal. Damn those L'sAaron
Reply:i havent tried it yet, but if you have a lot of build up you might wanna try using a wire feeder to speed up the process. Lincoln makes a few different hard facing wires, one or 2 of em looks like they might work for ya. this is Lincore BU http://www.mylincolnelectric.com/Cat...&tn=Lincore%BU-NateMiller Trailblazer 302gMiller Spoolmatic 30aLN-25 x 2Idealarc SP200Hypertherm Powermax 600
Reply:Considering the fact that I konw nothing about what your rollers are, I'll put this out:Don't use 7018, etc. Use Lincolns' Lincore 33 wire, or if you need to use stick, Wearshield BU