Thanks for showing the Multimatic 215. I have one with the TIG package. I haven't done any TIG yet. Another channel showed welding chrome moly tubing and stated you MUST have high frequency for starting.
learning a lot about the company. I got the idea not to long ago the best work takes man power and a good machine. not a good machine run by just a man.
What are you doing about the untempered Martensite in the HAZ with TIG of 4130? The FAA still recommends using an OA torch to do a post-weld stress relief, at about 1100-1200 degrees Fahrenheit. Lincoln's site recommends PWHT (stress relief) with tubing when it gets to around 0.120" and thicker--but the FAA goes so far as to recommend it with *any* 4130 welded with mild steel rod. I take it you're not doing this, as that part certainly didn't see a gas torch after the welding was finished.
Hi Tom. We apologize for the delayed response. Thin wall tubing (Thicknesses less than 0.120") applications do not typically require the normal 300ºF to 400ºF pre-heat to obtain acceptable results. However, the tubing should be at room temperature ( Apx. 70 ºF) or above before welding. The video in question is intended to address general tips to improve weld quality when welding on chromoly tube. Depending on material thickness and applicable welding code requirements, pre/post weld heat treatment will differ. The intent behind this video was not to address or instruct how to produce specific code compliant welds. We hope this information helps! Let us know if you have additional questions.
Hello i watch your video on welding chromoly tube and thought it was evry goo but you did not mention using a backing of shielding gas, or don't you uses any??
Hi, noticed that Bentley did not address the gas on the Multimatic 215 multiprocess welder. I have a Miller Diversion 180 unit for a few years and was looking into the Multimatic 215 to add to my shop - however this unit does not have a solenoid for the gas and therefore requires a manual gas valve to be opened and closed each time. Has this changed or does it still require manual gas valve? Thanks.
The Multimatic 215 does not have a high-frequency arc start for TIG. Currently, the only Multimatic that has high-frequency for TIG arc starts is the Multimatic 220.
Thanks for reaching out. The 3 filler metal options listed in the video are all GTAW filler rods: ER70S-2 ER80S-D2 Chromoly ER80S-D2 is readily available in MIG wire. The other 2 are not readily available in MIG wire. ER70S-6 and ER70S-3 are common GMAW wires that can be used for both welding steel and chromoly.
We are making chassis for formula car competition using 4130. But mounting plates are not 4130, rather they are mild steel so how to weld them with our 4130 chassis tubes.?
All well and good, but there is a world of difference to welding on table, seated comfortably and reaching into an airplane fuselage trying to wake an inaccessible overhead spot!
Hi, Brian. Thanks for reaching out. You would not avoid using steel filler metal on thicker pieces of chrome-moly. The only time you want to use 4130 filler metal is if the weldment will undergo stress relieving after welding. Here is an article on chrome-moly to learn more: www.millerwelds.com/resources/article-library/best-practices-for-tig-welding-of-4130-chrome-moly-tubing-in-general-motorsports-and-aerospace-applications
Appreciate everything you just talked about, excellent and very helpful.
Glad to hear it!
Very good explanation on techniques especially for unexperienced welding.
Thanks for showing the Multimatic 215. I have one with the TIG package. I haven't done any TIG yet. Another channel showed welding chrome moly tubing and stated you MUST have high frequency for starting.
good metal prep is key to a successful weld along with good fitment
That is what I weld everyday at work, stainless steel tubing for bathroom rails for handcaps stalls. Fun stuff.
Nice welds. Cleaning tip was good to know. I will be welding chromoly soon.
some good knocklege layed down. good videos.
learning a lot about the company. I got the idea not to long ago the best work takes man power and a good machine. not a good machine run by just a man.
Thank you!
very informative
Thanks, Eric!
Garner's Technical Institute
Really informative but the Muzak drove me away - what does it add?
What are you doing about the untempered Martensite in the HAZ with TIG of 4130? The FAA still recommends using an OA torch to do a post-weld stress relief, at about 1100-1200 degrees Fahrenheit. Lincoln's site recommends PWHT (stress relief) with tubing when it gets to around 0.120" and thicker--but the FAA goes so far as to recommend it with *any* 4130 welded with mild steel rod. I take it you're not doing this, as that part certainly didn't see a gas torch after the welding was finished.
Hi Tom. We apologize for the delayed response. Thin wall tubing (Thicknesses less than 0.120") applications do not typically require the normal 300ºF to 400ºF pre-heat to obtain acceptable results. However, the tubing should be at room temperature ( Apx. 70 ºF) or above before welding. The video in question is intended to address general tips to improve weld quality when welding on chromoly tube. Depending on material thickness and applicable welding code requirements, pre/post weld heat treatment will differ. The intent behind this video was not to address or instruct how to produce specific code compliant welds. We hope this information helps! Let us know if you have additional questions.
1:59 Giant Tig Torch :D:D:D
For weld a 4130 frame bike with very thin thickness, do you recomend ER70 or ER80??
We recommend an ER80 filler with the 4130 Chromoly.
Hello i watch your video on welding chromoly tube and thought it was evry goo but you did not mention using a backing of shielding gas, or don't you uses any??
Hi, noticed that Bentley did not address the gas on the Multimatic 215 multiprocess welder. I have a Miller Diversion 180 unit for a few years and was looking into the Multimatic 215 to add to my shop - however this unit does not have a solenoid for the gas and therefore requires a manual gas valve to be opened and closed each time. Has this changed or does it still require manual gas valve?
Thanks.
Thanks for reaching out. The Multimatic 215 has two separate valves, one for MIG and one for TIG, so there is no need for a manual valve on the torch.
I used one today. No valve on torch
Does the multimatic not have high frequency start for TIG?
The Multimatic 215 does not have a high-frequency arc start for TIG. Currently, the only Multimatic that has high-frequency for TIG arc starts is the Multimatic 220.
I will be welding a sprint car frame and was wondering if you were using a 1/16 or 3/32 tungsten?
Thanks for reaching out. To discuss your particular application, please give us a call at 920-734-9821.
john Smith thanks!
Nice!
hi you saying that ER70sD2 filler rod were you yousing on mig welder to weld mild steel also can be yoused to weld 4130 chrome moly steel?
Thanks for reaching out.
The 3 filler metal options listed in the video are all GTAW filler rods:
ER70S-2
ER80S-D2
Chromoly
ER80S-D2 is readily available in MIG wire. The other 2 are not readily available in MIG wire. ER70S-6 and ER70S-3 are common GMAW wires that can be used for both welding steel and chromoly.
We are making chassis for formula car competition using 4130. But mounting plates are not 4130, rather they are mild steel so how to weld them with our 4130 chassis tubes.?
Thanks for reaching out. To discuss recommendations for your specific application, please give our technical support team a call at 920-734-9821.
Stainless. Wanna say it's 308
All well and good, but there is a world of difference to welding on table, seated comfortably and reaching into an airplane fuselage trying to wake an inaccessible overhead spot!
+Miller Welders so would you advoid welding thicker chromoly with mild still rod? if so what thickness is the max to weld with mild steel rod?
Hi, Brian. Thanks for reaching out. You would not avoid using steel filler metal on thicker pieces of chrome-moly. The only time you want to use 4130 filler metal is if the weldment will undergo stress relieving after welding. Here is an article on chrome-moly to learn more: www.millerwelds.com/resources/article-library/best-practices-for-tig-welding-of-4130-chrome-moly-tubing-in-general-motorsports-and-aerospace-applications
Miller Welders so would using mild steel on on 1/4" or 3/16 acceptable?
What TIG torch do you recommend in the video? 9-20?
Thanks for reaching out. The Multimatic 215 comes standard with a WP-17 torch, however a WP-9/20/25 Series is used for the purpose of this video.
better view of the finished job would have been great
You need about 334 more tacks before welding
Yeah dude just chuck it up in your lathe. Everybody has one of those.
Sqare tubbing welding
I cary steelNess wilding
Air cooler torches are never good for tight spaces. That guy welds a liille too hot and the welds are too big