Mr Tig Blog

How to Weld DOCOL R8

Jan 2015 16
16 15 Fri
Written by Mr. TIG (Wyatt Swaim)

There is a good chance that you have never heard of DOCOL R8 and if you have, there's a good chance that you have never had the chance to weld it. The fact is, DOCOL R8 has been around for a while, however it is fairly new to the United States. Its properties are very similar to 4130 Chrome Moly, both in how we weld it and its strength.

In this video we will show you some of the techniques we use to get successful welds when TIG welding DOCOL R8.

Read More

How to Weld Steel to Stainless Steel

Jan 2015 09
16 15 Fri
Written by Mr. TIG (Wyatt Swaim)

Many people think that it is not possible to weld dis-similar metals together with full strength. Well, in some ways that is true, but it all depends on how you look at it. In this episode of TIG Time we are going to weld 1018 mild Steel to 309 Stainless Steel with "full strength". Now when we say full strength, you always have to downgrade your properties to the weaker of the two metals, in this case the 1018 Steel.

Be sure you choose the correct filler material to insure you are getting the best possible properties out of your weld. Click this link to download the chart: Stainless Steel Filler Selection Chart

Read More

Stick Welding SCH 40 Pipe Uphill

Dec 2014 25
16 15 Thu
Written by Mr. TIG (Wyatt Swaim)

We normally cover TIG welding on this show, however we have been getting a lot of requests for different techniques in pipe welding. The head welding instructor, Bob Moffatt, over at Cowley County College is one of the best pipe welders we know, so we went to him to give us some help.

In this episode we show you how to prepare the pipe and then how to weld the root pass, hot pass, fill pass and cap pass with full reinforcement. You will also learn proper techniques for getting the best results for each pass as well as grinding advice.

Read More

Stick Welding SCH 40 Pipe Downhill

Dec 2014 31
16 15 Wed
Written by Mr. TIG (Wyatt Swaim)


This is the second video in our two part series on how to weld pipe with SMAW. In the first video we showed you some tips, tricks and techniques to weld uphill. In this episode we show you how to weld a root pass, hot pass, fill pass and cap pass all using the stick welding process.

Read More

How to Weld Titanium without Trail Cups

Dec 2014 19
16 15 Fri
Written by Mr. TIG (Wyatt Swaim)

Titanium is among the most difficult alloys to weld when it comes to gas coverage. Unlike most metals, Titanium will absorb oxygen, contaminating and weakening the heat effected zone until it reaches (at least) 800 degrees. Titanium is a very expensive metal, so when a weld goes bad, it is a costly mistake. There are many different devices used to avoid this contamination including trail cups, purge chambers and a host of homemade solutions.

In this episode we are going to bust the myth that you MUST have these devices to achieve good Titanium welds. We will be using a jumbo gas lens and purging the backside of the weld... No trail cups and no purge chambers.

Read More