Can someone recommend which electrodes and filler to best weld 4130 Chromoly? I have never used this and making a run to the supply store.
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03-31-2011, 11:54 AM #1Member
- Join Date
- Aug 2010
Electrodes and Filler for Chromoly 4130 (1.0 - 1.7 thickness)
03-31-2011, 08:39 PM #2Senior Member
- Join Date
- Jan 2009
- Whitehorse, Yukon
ER70S-2 and ER80S-D2, in that orderBig Blue 400D
Miller S-32 suitcase
Lincoln LN-7 (BIG suitcase)
Lincoln 350MP with 35' push-pull gun
Lincoln PrecisionTIG 375
Spectrum 1000 plasma cutter
04-01-2011, 03:40 PM #3
I agree the ER70S-2 is the best choice all things considered. You can read a lot about this subject all over the internet.
Make sure to pass a flame over the weldment prior to welding just to make sure there is no moisture present.
It may look dry, but when you heat it just a little (200ºF), you will see moisture beads appear then quickly dry up. Then is the time to weld. Outside air temp should be around 70ºF
Also if it is tubing make sure there is no machining oil left inside the tube or it will drain towards the weld. Make sure the tubing is sanded before welding. Not grinded -SANDED.
04-01-2011, 09:31 PM #4Dynasty 300DX
Hobart Handler 120
Smith LW7, MW1, AW1
Smith AR/He Mixer