Many welding workshops focus heavily on choosing the right brass welding rod.
But after years in the brazing industry, we found something interesting:
In many cases, the real difference between a clean joint and a failed weld is not only the rod — itis the brazing flux.
A repair workshop in Southeast Asia once contacted XINXIN WELDING because their workers were
facing repeated problems when using brass welding rods on copper tube connections.
The issues sounded familiar:
▶ filler metal not flowing smoothly
▶ black oxidation around the joint
▶ weak bonding
▶ occasional leakage after testing
At first, they thought the problem came from the brass rod quality or flame temperature.
But after checking the process, we found the real issue: they were using ordinary low-quality flux that could not
properly clean the copper surface during brazing.
When brass welding rods are used on copper or copper alloy joints, oxidation forms very quickly during heating.
Without a stable copper brazing flux, the filler metal cannot spread evenly, which leads to poor wetting and unstable
joints.
We suggested they test XINXIN WELDING Copper Brazing Flux together with our HS221 Brass Welding Rod.
The workshop noticed the difference immediately.
The brazing became smoother.
The filler metal flowed faster.
The weld surface looked cleaner and brighter.
Most importantly, workers no longer needed to repeatedly heat the same area.
For the workshop owner, this meant:
▶ less rework
▶ faster production
▶ lower gas consumption
▶ more stable welding quality
Today, many HVAC installers, copper tube workshops, and metal repair factories are realizing that brazing flux is not
just a supporting material.
It directly affects:
▶ welding efficiency
▶ joint strength
▶ appearance
▶ long-term reliability
At XINXIN WELDING, we focus on practical brazing solutions for real production environments.
Our Copper Brazing Flux is widely used together with:
▶ HS221 Brass Welding Rods
▶ Low Fuming Bronze Brazing Alloys
▶ Copper tube brazing applications
▶ HVAC and refrigeration systems
Because good brazing is not only about melting metal.
It is about creating strong, clean, and reliable connections that customers can trust.
Website: www.superlionwelding.com
Email: jasmine@xxhccn.com
Brand: XINXIN WELDING
Tel : +86 13705623213
Email : Jasmine@xxhccn.com
Wechat : +8613705623213
Whatsapp : +8613705623213
Address : 4077 Qifeng Road, Tongling, Anhui, China
