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Old 12-23-2011, 11:07 PM   #61
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Default Re: Chomoly cage filler besides ER70/80

My local NHRA inspector asked me today what rod I was using in my build, I showed him the boxes , he smiled and said you have been taught well, and said thatnk you for listening , I have the ER70 rods btw
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Old 12-24-2011, 12:22 AM   #62
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Default Re: Chomoly cage filler besides ER70/80

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hey like i said the local tech guy pulled his big binder out. he flipped to the back of it. and what do we both see???? NHRA only accepts 4 filler rods for weling!!!!! if some of these backyard "chassis shops" are using different shit, than shame on them.
I hear ya. I have to admit I was hoping all the hot rod filler users would be flooding the thread with all the wrecked cars that people walked away from. It sure would be easier to swallow than cutting out a cage.
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Old 12-24-2011, 10:02 AM   #63
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Default Re: Chomoly cage filler besides ER70/80

I do not think you will find any chassis shops that advertise they use anything other than Er70S2 on 4130 tubing that's the bottom line !!!!!!!!!!!!!!!!

I do use er 80 on housing ends because after i weld them i reheat that part of the housing to 600-700 help stress releave the weld
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Old 12-24-2011, 10:02 AM   #64
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Default Re: Chomoly cage filler besides ER70/80

i buy filler rod through crown. they are a filler rod company.they gave me a reference book that shows the use and facts on every metal.and if im confused i just call and they set me straight.pretty simple. your welds are only as strong as your filler metal. so i dont know why you would play games with this.dont ask the wrong companys,go straight to the main source like crown.these stores selling welders dont know shit.go to the main source,filler rod company like crown.ask the right question to the right people.
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Old 12-24-2011, 11:57 AM   #65
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Default Re: Chomoly cage filler besides ER70/80

I had my local weld supply shop call crown metals and they highly recommended er80s-d2. They said it was developed for motorsports.
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Old 12-24-2011, 01:01 PM   #66
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Default Re: Chomoly cage filler besides ER70/80

I use both 70S-2 and 80S-D2...never tried anything else
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Old 12-24-2011, 11:27 PM   #67
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Default Re: Chomoly cage filler besides ER70/80

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I use both 70S-2 and 80S-D2...never tried anything else
same here. mostly ER80
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Old 12-25-2011, 12:10 AM   #68
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Default Re: Chomoly cage filler besides ER70/80

those of you that are using ER70 are you useing the coated or
uncoated?
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Old 12-25-2011, 12:17 AM   #69
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Default Re: Chomoly cage filler besides ER70/80

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those of you that are using ER70 are you useing the coated or
uncoated?

all the filler i have is marked at both ends and is copper coated
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Old 12-25-2011, 12:28 AM   #70
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Default Re: Chomoly cage filler besides ER70/80

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Originally Posted by overkillrc View Post
same here. mostly ER80
X2...for me it just flows a little better and seems to require less amps
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Old 12-25-2011, 12:52 AM   #71
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Default Re: Chomoly cage filler besides ER70/80

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X2...for me it just flows a little better and seems to require less amps
i noticed it flows better as well i gotta get some 1/16 in 80 , the stuff i have is 1/8 the tard at the depot screwed up on my order and got me the wrong stuff
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Old 12-25-2011, 12:59 PM   #72
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Default Re: Chomoly cage filler besides ER70/80

Can a filler can have high % elongation and high brinnel?

The question has still yet to be answered. It is obvious that 70s2 is industry standard but what is its brinnel hardness after welding. It seems funny to myself that there are maintenance fillers on the market that advertise 7 to 9% more elongation than 70s2 with brinnel in the low 200's.

I am also curious as to where where sfi mandates er 70 and 80 as I have seen other cars sticker without these.
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Old 12-25-2011, 01:22 PM   #73
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Default Re: Chomoly cage filler besides ER70/80

One of the reasons for mild steel filler (ER70S-2) is that it pulls some of the carbon out of the 4130 and mixes it with the filler. The resultant alloy is ductile and has properties different from the raw filler rod. 308 SS will do the same to some extent. And that's why you don't use 4130 filler, it concentrates the carbon and gets too brittle.
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Old 12-25-2011, 04:45 PM   #74
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Default Re: Chomoly cage filler besides ER70/80

that says it in a nut shell. mark williams, who probably has done more testing than anyone else combined on metals, explains it that way.
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Old 12-26-2011, 10:39 AM   #75
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Default Re: Chomoly cage filler besides ER70/80

Quote:
Originally Posted by xdr1967 View Post
Can a filler can have high % elongation and high brinnel?

The question has still yet to be answered. It is obvious that 70s2 is industry standard but what is its brinnel hardness after welding. It seems funny to myself that there are maintenance fillers on the market that advertise 7 to 9% more elongation than 70s2 with brinnel in the low 200's.

I am also curious as to where where sfi mandates er 70 and 80 as I have seen other cars sticker without these.
SFI dosent mandate it.......NHRA does. SFI does not make up NHRA'S rulebook. Your may have saw cars with stickers on them with different filler rods used. But i can and will bet my life on it if the inspector knew what rod was used (and it wasnt one of the 4 that nhra accepts)than he wouldnt have put a sticker on it. They dont check for what filler rod was used (unless they walk around and check out the shop). all the sfi book does is say what size tube goes where and what wall thickness... they have no way of checking for what filler rod
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