HS221

HS221 (RBCuZn-A) flux-cored brass welding wire is a tin-containing copper-zinc alloy welding wire designed for brazing of copper, steel and nickel alloys. Its unique flux core formula ensures excellent welding process performance and weld quality. The melting point is about 900℃, the deposited metal has good fluidity, and has good strength and corrosion resistance. This welding wire is suitable for a variety of welding methods such as flame brazing, furnace brazing, induction brazing, etc. It can also be used for metal arc welding and inert gas shielded welding of copper and copper-nickel alloys. It is an ideal choice for refrigeration, plumbing, electrical and other industries.

1. Excellent welding process performance
• Good fluidity: The molten pool has excellent fluidity and can fully fill the joint gap to form a beautiful weld
• Self-protection function: The flux core component can provide effective protection and reduce the generation of pores
• Low melting point characteristics: The melting point of about 900℃ facilitates brazing operations and reduces the thermal impact on the parent material
• Good wettability: It has good wettability to various substrates such as copper, steel, and nickel, and the welded joint has high strength
2. High-quality weld performance
• Higher joint strength: The weld metal has good mechanical properties, and the tensile strength is ≥290MPa
• Good corrosion resistance: The copper-zinc alloy component provides a certain degree of corrosion resistance and is suitable for a variety of environments
• Color matching: The weld color is similar to the brass parent material, and the appearance is good
• Excellent processing performance: After welding, it can be cut, polished and other mechanical processing
3. Wide applicability
• Applicable to brazing of copper and copper alloys, low carbon steel, stainless steel, nickel alloys and other materials
• Can be used for flame brazing, induction brazing, furnace brazing and other welding processes
• Suitable for refrigeration equipment, plumbing pipes, electrical accessories, automotive parts and other application scenarios

Chemical composition (%)

Mechanical properties

Specifications

• Refrigeration equipment manufacturing

Used for connecting copper pipes and steel pipes in refrigeration equipment such as air conditioners and refrigerators. The welding joints have good sealing and corrosion resistance.

• Plumbing Pipeline System

Suitable for the connection of brass pipes and valves. The welding strength is high and meets the sanitation requirements of drinking water.

• Electrical equipment manufacturing

Used for the connection of copper conductors in electrical equipment such as motors and transformers. It has good conductivity and high mechanical strength.

• Automotive parts

Suitable for the welding of brass parts such as automobile radiators and oil systems. It is vibration-resistant and highly reliable.

Workpiece cleaning:

Thoroughly remove oil, oxide, rust and other impurities in the welding area
Surface treatment can be performed with sandpaper, wire brush or special cleaning agent
Assembly gap is controlled at 0.05-0.2mm to ensure good solder filling
Wire preparation:

No need to dry, keep dry and use
Select welding wire of appropriate diameter according to joint thickness
Equipment preparation:

Flame brazing: oxygen-acetylene or propane torch, neutral flame or slightly carburized flame
TIG welding: equipped with argon protection system, purity ≥99.99%
MIG welding: use pure argon or argon + helium mixed gas protection

• Preheating control:

Recommended preheating temperature: 300-400℃
Use local preheating Way to avoid overheating of the base material

• Welding parameters:

Flame brazing: torch distance from workpiece 5-10mm, moving speed 50-100mm/min
TIG welding: arc voltage 10-15V, welding speed 80-120mm/min
MIG welding: wire feeding speed 3-6m/min, shielding gas flow 15-25L/min

• Operation skills:

Maintain an angle of 30-45° between the welding wire and the workpiece to ensure good molten pool filling
Use continuous wire feeding to avoid interruption
Maintain a stable travel speed during welding to ensure uniform welds

• Post-weld treatment:

Natural cooling, avoid forced cooling
After welding, pickling can be performed to remove the surface oxide film
Annealing treatment is performed when necessary to eliminate welding stress

Packing Specifications

Ordering Information

1. Professional brass welding solution
High-quality formula: Precisely control the copper-zinc ratio, add tin elements to improve fluidity and strength
Stable quality: Use advanced flux-cored manufacturing process to ensure uniform and stable welding wire quality
Comprehensive testing: Each batch of products is tested for chemical composition and mechanical properties, and the quality is reliable
2. 20 years of industry experience
Technology accumulation: Focus on welding material production for 20 years, with rich experience in brass welding wire research and development
Capacity guarantee: Annual production capacity of 5,000 tons, which can meet large-scale order needs
Customized service: Alloy composition and flux-cored formula can be adjusted according to customer special needs
3. Perfect quality assurance system
Quality certification: Passed ISO 9001 quality management system certification, product quality meets international standards
Full traceability: Perfect production record system to achieve full traceability of product quality
Customer recognition: Long-term partner of many well-known companies at home and abroad
4. Excellent customer service
Technical support: Provide professional brass welding process consultation and on-site technical guidance
Quick response: Regular orders are shipped within 72 hours, and special specifications are produced within 10 days
Sample policy: Provide free sample testing, and then order in bulk after satisfaction
About us
Hangzhou Lin'an Dayang Welding Materials Co., Ltd. is a professional welding material company integrating R&D, production and sales, with 20 years of industry experience. The company's main products include brass welding wire, stainless steel welding rod, carbon steel welding rod, aluminum alloy welding rod and other series of products, with an annual production capacity of 5,000 tons, and products are exported to more than 30 countries and regions including Europe, America, Southeast Asia, etc.

We adhere to the concept of "quality first, customer first" and introduce advanced

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