There are just additional considerations to keep in mind.
Tig welding rod for 4130 steel.
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With the elevated carbon content even low levels of hydrogen can wreck havoc.
Low hydrogen electrodes minimize the amount of diffusible hydrogen in the weld.
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Todd bevis poses with one of the chrome moly roll cages he built by.
Sae 4130 aisi 4130.
The following article discusses some of the recommended procedures and equipment for successfully tig welding 4130 chrome moly steel.
What consumable can be used to weld on sae 4130 steel tubing.
On light chrome moly tubing mild steel electrodes are commonly used.
Do i need to pre heat.
There are others like 316l and if you know what you are welding its best to use a match.
On multiple pass welds cro mo alloy electrodes are usually specified.
Can i weld 4130 using the tig process.
Yes 4130 chrome moly has been tig welded in the aerospace and aircraft industries for years.
Welding 4130 is not that much different than welding steel or stainless steel as far as technique is concerned.
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As with all welding proper procedures and techniques must be followed.
The filler metal recommended for welding 4140 steel is er80s d2.
Er308l stainless tig rod when you know that you are welding 300 series stainless steel 304 is the most common 300 series stainless used you cant go wrong with er308 rods.
4130 chrome moly can be welded with the tig or mig process.
Er70s 2 can be used but you will be undermatching the base material.
Preheat is generally not needed for thinner sections 0 120 in but for tubing larger than 0 120 a 300f 400f preheat is needed to obtain acceptable results.
Watch your arc strikes dont speed cool use e70s2 tig welding rod er80sd2 works well also pay attention to good fit ups weld a little slower.
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