Welding Rod For 4130 Steel

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.

Welding rod for 4130 steel. There is enough pickup of alloy from the base material to give the required tensile strength in the as welded condition. Successfully welding 4130 requires preserving its mechanical properties by heating and cooling the weld in a controlled manner. Excess heat causes carbide precipitation and cooling too quickly causes embrittlement. Other stainless steel fillers can cause cracking.

This is acceptable provided 310 or 312 stainless steel fillers are used. Fortunately the gtaw process provides sufficient heat control. What consumable can be used to weld on sae 4130 steel tubing. Sae 4130 aisi 4130 sae4130 is a low alloy copper coated wire designed for the welding of heat treatable low alloy steels such as the sae aisi 4100 or 8630 series as well as steel castings with similar hardening characteristics.

This is acceptable provided 310 or 312 stainless steel filler metals are used. Other stainless steel filler metals can cause cracking and stainless steel filler metal is more expensive. Some fabricators prefer using austenitic stainless steel filler metals to weld 4130 tubing. Stainless filler material is typically more expensive.

A pre heat of 300 f 350 f is required for some of the higher carbon grades to prevent cracking.