Welding Rod For 4130 Steel

This is acceptable provided 310 or 312 stainless steel filler metals are used.

Welding rod for 4130 steel.

On multiple pass welds cro mo alloy electrodes are usually specified. This is acceptable provided 310 or 312 stainless steel fillers are used. Some fabricators prefer using austenitic stainless steel filler metals to weld 4130 tubing. What consumable can be used to weld on sae 4130 steel tubing.

Fortunately the gtaw process provides sufficient heat control. Other stainless steel filler metals can cause cracking and stainless steel filler metal is more expensive. There is enough pickup of alloy from the base material to give the required tensile strength in the as welded condition. Smaller 4130 parts like below are sometimes tig welded with 4130 rod so they can be heat treated after welding a tig finger heatshield is great for welding 4130 chromoly tubing click on the image below to learn more have you ever tried to bend a piece of 4130 chromoly tubing.

Excess heat causes carbide precipitation and cooling too quickly causes embrittlement. Successfully welding 4130 requires preserving its mechanical properties by heating and cooling the weld in a controlled manner. Some fabricators prefer to use austenitic stainless steel fillers to weld 4130 tubing. Other stainless steel fillers can cause cracking.

On light chrome moly tubing mild steel electrodes are commonly used.