Welding 1/2" 4140 bar

[wagspe208]

It is not ugly white anymore. I will see if I have any good pics.
Wags

I have to get a spectacular shot scanned in the computer. I will give it a whirl in the next few days.

[jerems]

Holy chit mahn!! That's an engine! Couldn't you find a little bigger one to put in there? I like you logic - good luck in your solution.

[Sberry]

Actually 2 ft drops of beams are common in fab shops, scrap bins are full of them as there isn't much call for short drops. I personally wouldn't make it from an exotic alloy if mild would do.

[wagspe208]

Well, just a final update.
I preheated the metal to 600F. Welded it in 2" sections alternating ends, etc to kep it from pulling all to ****, let it cool slowly and bolted her in. I could not have asked for it to work any better. Alignment was awesome. Weld seems to be excellent. It has about 50+ passes on it at 150 mph or so. (8) 6.0 runs at 1000' also. This takes 1200+ Hp ish to do. I have always and still do look at it every pass.
Preheat is my friend.
Thanks for the help.
Wags

BTW, I milled a slot in the top plate and pressed the vertical part in to the slot. I welded on the top then and around the bottom. (so this is about 30+ inches of weld total) The tube (that the propshaft goes through) I milled a slot for alignment and it had about .001 press to the vertical piece.

PS we won the last 4 out of 5 races after that. 1 for 10g.!!

[welder_one]

still wanna see pics of that beast in actions, please? i am glad that it worked out for ya. i didnt see this post until now. shoot me a pm next time you need a 2 or 3 foot drop of some heavy beam...... heck, i even have a 6 ft drop of 38 inch beam 390 pound per foot

[wronghand]

Looks like you already got 'er done, cudo's!! For future reference tho:

Preheat 5-600 degrees, if possible weld with a nickel/chromoly rod (such as Arctec's Unicrom series) and cool slowly. If you can't find that rod, ER80S-D2 is a real decent option for MIG wire. In the mean time, have fun!!

WH

[blitzman]

you can use duplex(2209) or super duplex(2507) with about 400f pre heat. It is very good for any sort of dissimilar welding

[wagspe208]

A couple hundred passes later... looks great!
Wags

Oh, yes.. that is exactly how is is supposed to ride. The front sponsons are there for the ride after the launch. Bottom 1/2 of the prop in the water.

[wagspe208]

Put some graphics on over the winter. Had to break up the red a little.

[blown99gt]

A couple hundred passes later... looks great!
Wags

Oh, yes.. that is exactly how is is supposed to ride. The front sponsons are there for the ride after the launch. Bottom 1/2 of the prop in the water.

crazy.. you gota have a big pair to do that stuff! ill stick to 4 wheels