Heating trailer eye

[Massey Ferguson 6480]

Whats best and easiest way to heat the hitch eye for welding? Tack into place and try to heat evenly with oxy acet? Or put in aga for a couple of hours the get it squared on drawbar and get it welded? Thanks

 

[Mur Huwcun]

I would say the oxy as you will then warm the parent metal aswell. Most of the work is the prep, getting it clean, preparing a nice bevel and setting it up square

 

[Massey Ferguson 6480]

I would say the oxy as you will then warm the parent metal aswell. Most of the work is the prep, getting it clean, preparing a nice bevel and setting it up square

Thats what i was leaning towards, get it square and tacked up. Heat up with oxy then weld away.

 

[tomlad]

Gonna be a big rush otherwise eh

 

[Hard Graft]

No 2 Rose bud on oxygen propane welding torch

but get weld prep well done and with a big mig be careful not to over heat

 

[Massey Ferguson 6480]

No 2 Rose bud on oxygen propane welding torch

but get weld prep well done and with a big mig be careful not to over heat

Just nicely hot? Gona use stick welder so be plenty of heat with that.

 

[Wisconsonian]

Carbon Equivalent And Weldability​

December 29, 2009


The weldability of steels is influenced primarily by the carbon content. At higher carbon levels, steels may need either pre- or post- weld heat treatment in order to prevent stress build up and weld cracking.
Generally speaking, if the Carbon Equivalent (CE) is 0.35 or below, no pre- or post- weld thermal treatment is needed. In our experience with maintenance welding, we have found that preheating was beneficial between 0.35 and 0.55 CE. Above 0.55 CE we usually both pre- and post- weld heated to relieve stress and prevent cracking.
So CE= .35 max.
However the other elements that are contained in the steel also have an effect on the steel’s “carbon equivalence.” These additional elements can really add up in scrap fed electric arc furnace steels that now predominate in our market.

Electric Arc Furnaces are predominately scrap fed.
Photo credit.
Here are two formulas for calculating Carbon Equivalents.
CE=%C+(%Mn/6)+(%Cr+%Mo+%Va)/5 + (%Si+%Ni+%Cu)/15
This is the first formula I learned when I took over metallurgical support for maintenance ‘back in the day.’
In this formula you can see that 6 points of Manganese are approximately equal to one point of Carbon. 5 points of Chrome, Moly or Vanadium are roughly equal to a point of Carbon, while it takes about 15 points of Silicon, Nickel or Copper to get about the same effect as one point of Carbon.
The GE formula for Carbon Equivalency is CE= C+(Mn/6)+(Ni/20)+(Cr/10)+(Cu/40)+(Mo/50)+(Va/10). If this is less than .35 max, you should have no need to pre or post weld thermal treat in most cases.


As long as CE is no more than .35, you probably won’t need to preheat or post weld stress relieve your welded parts. above .35 CE, you may need either or both depending on section thickness and CE.

if you preheat, and you don't have a specification, then 400 F is what I do, then keep the interweld temp from getting too high, so give it time to rest between welds and watch it with a non contact thermometer, then when done cover with dry ashes or lime to let it cool slowly, or post heat treat if it needs it.

 

[Massey Ferguson 6480]

Carbon Equivalent And Weldability​

December 29, 2009


The weldability of steels is influenced primarily by the carbon content. At higher carbon levels, steels may need either pre- or post- weld heat treatment in order to prevent stress build up and weld cracking.
Generally speaking, if the Carbon Equivalent (CE) is 0.35 or below, no pre- or post- weld thermal treatment is needed. In our experience with maintenance welding, we have found that preheating was beneficial between 0.35 and 0.55 CE. Above 0.55 CE we usually both pre- and post- weld heated to relieve stress and prevent cracking.
So CE= .35 max.
However the other elements that are contained in the steel also have an effect on the steel’s “carbon equivalence.” These additional elements can really add up in scrap fed electric arc furnace steels that now predominate in our market.

Electric Arc Furnaces are predominately scrap fed.
Photo credit.
Here are two formulas for calculating Carbon Equivalents.
CE=%C+(%Mn/6)+(%Cr+%Mo+%Va)/5 + (%Si+%Ni+%Cu)/15
This is the first formula I learned when I took over metallurgical support for maintenance ‘back in the day.’
In this formula you can see that 6 points of Manganese are approximately equal to one point of Carbon. 5 points of Chrome, Moly or Vanadium are roughly equal to a point of Carbon, while it takes about 15 points of Silicon, Nickel or Copper to get about the same effect as one point of Carbon.
The GE formula for Carbon Equivalency is CE= C+(Mn/6)+(Ni/20)+(Cr/10)+(Cu/40)+(Mo/50)+(Va/10). If this is less than .35 max, you should have no need to pre or post weld thermal treat in most cases.


As long as CE is no more than .35, you probably won’t need to preheat or post weld stress relieve your welded parts. above .35 CE, you may need either or both depending on section thickness and CE.

if you preheat, and you don't have a specification, then 400 F is what I do, then keep the interweld temp from getting too high, so give it time to rest between welds and watch it with a non contact thermometer, then when done cover with dry ashes or lime to let it cool slowly, or post heat treat if it needs it.

Just looked, my eyes en8, says on google pre heat to 100 degrees c

 

[Farmer_Joe]

That’s f**k all you could just weld a line underneath to heat it to that, prob more important as sbove to not get it to hot, weld in short runs not getting it to hot

 

[mobileweld]

Never pre heated one yet and nor has any man who I have learned from.

 

[Massey Ferguson 6480]

Never pre heated one yet and nor has any man who I have learned from.

Interesting, seems to divide opinion welding on eyes. Think i will give it a little heat but wont go over board.

 

[tomlad]

While were on it What about not welding across the back.off the eye ??

 

[AJR75]

There are formulas and graphs to work out the pre heat requirements when welding. These also require you to know the heat input from your welding process which is derived from another equation combining travel speed, amperage, filler wire size etc etc. It's one of the reasons manufacturers have welding procedures and goes a long way to ensuring consistency in their welded joints.

No one will be able to advise you the exact pre heat required as assume you're not running under a welding procedure and the information that gives.

That said, pre heat isn't necessarily a bad thing but there are just too many unknowns to be any more specific.

 

[Massey Ferguson 6480]

While were on it What about not welding across the back.off the eye ??

Going to weld down down both sides and back but only a light run along the front.

 

[tomlad]

Whats kieth fenner " get er done "