Technical Overview

Silicon bronze brazing filler rods (AWS A5.7 ERCuSi-A) are copper-based alloys containing approximately

2.8 – 4.0% silicon. They are widely used in brazing and braze-welding applications where controlled heat input

and joint integrity are required.

Key Advantages

- Lower working temperature (965-1035°C) reduces distortion and preserves base metal properties

- Excellent wetting and flow characteristics for uniform joints

- Moderate tensile strength (approx. 350MPa)

- Good corrosion resistance in atmospheric environments

Applications

- Automotive body repair

- HVAC brackets and components

- Sheet metal fabrication

- Marine and decorative metalwork

Process Considerations

- Shielding gas: Argon recommended (TIG/MIG)

- Clean surfaces required before brazing

- Prefer lap joint design

- Avoid overheating to maintain flow performance

Why XINXIN WELDING

- Controlled chemical composition

- Tight dimensional tolerance

- Stable melting behavior

- Reliable batch consistency

Contact

Tongling Xinxin Welding Materials Co., Ltd.

Website: https://www.superlionwelding.com/

Email: jasmine@xxhccn.com

WhatsApp: +86 13705623213

In copper pipe brazing, one poor joint can mean refrigerant leakage, costly repairs, and

customer complaints.

 That’s why professional technicians and HVAC manufacturers choose XINXIN WELDING — a

trusted supplier of high-performance brazing materials designed for stable quality and reliable results.

 Our BCuP-2 Phos-Copper Brazing Rods are developed for fast-flowing, clean, and strong copper

brazing applications.

Whether you are producing air conditioners, refrigeration systems, heat exchangers, or plumbing

systems, XINXIN WELDING helps you achieve:

 • Cleaner brazing joints

 • Better capillary action

 • Faster operation

 • Lower production cost

 • Long-lasting performance

Why Customers Prefer XINXIN WELDING

 1.Excellent Flowability

The rod melts smoothly and spreads quickly into the joint, helping operators reduce brazing time

and improve efficiency.

 2.Strong Leak-Free Connections

Designed for copper pipe systems requiring stable pressure resistance and long-term durability.

 3.No Extra Flux Needed for Copper-to-Copper Brazing

The phosphorus content provides self-fluxing capability, simplifying operation and reducing material cost.

 4.Stable Quality Every Batch

Strict production control ensures consistent chemical composition and reliable brazing performance.

 5.Cost-Effective Solution

Especially for the BCuP-2 (0% Silver) grade, customers can achieve excellent brazing performance with

lower material cost.

Ideal Applications

 • HVAC manufacturing

 • Refrigeration systems

 • Copper pipe installation

 • Air conditioning maintenance

 • Heat exchangers

 • Industrial copper joining

 • Plumbing systems

BCuP- 2 — Best Choice for Economical Copper Brazing

Typical Composition:

Copper: Remainder

Phosphorus: 7.0-7.5%

Other (Total): 0.15%

About XINXIN WELDING

 TONGLING XINXIN WELDING MATERIALS CO., LTD. is a professional manufacturer specializing in

brazing and welding materials.

Main Products:

 • Phos-Copper Brazing Rods

 • Silver Brazing Alloys

 • Brass Welding Rods

 • Copper Brazing Flux

 • Aluminum Welding Wire

 • Flux-Cored Brazing Materials

Contact Us

Website: www.superlionwelding.com

Email: jasmine@xxhccn.com

WhatsApp: +86 13705623213

XINXIN WELDING

Reliable Welding Solutions. Trusted Worldwide.

In today’s HVAC, refrigeration, plumbing, and industrial manufacturing industries, reliable brazing

performance is more important than ever.

Whether for copper pipe installation, heat exchanger production, or industrial metal joining, customers

demand:

• Strong joints

• Smooth flow

• Stable quality

• Long-term reliability

That is why professionals worldwide are choosing:

XINXIN 40% Brazing Filler Metal

Developed by XINXIN WELDING — TONGLING XINXIN WELDING MATERIALS CO., LTD., our

40% silver brazing alloy is designed to deliver consistent performance, excellent wetting action,and

dependable brazed joints across a wide range of applications.

Excellent Flow Performance for Professional Brazing

XINXIN 40% Brazing Filler Metal is formulated for brazing:

• Copper

• Brass

• Steel

• Copper alloy components

The alloy offers:

• Smooth capillary flow

• Strong bonding strength

• Excellent wettability

• Stable melting performance

• Reliable leak-free joints

Its controlled melting range allows easier operation even when joint clearances are not perfectly

uniform, making it ideal for professional production and repair work.

Designed for HVAC & Refrigeration Industries

Modern HVAC and refrigeration systems require brazed joints that can withstand:

• Pressure

• Vibration

• Temperature fluctuations

• Long-term service conditions

XINXIN 40% Brazing Filler Metal is widely used in:

• Air conditioning systems

• Refrigeration equipment

• Heat exchangers

• Copper piping systems

• Industrial cooling systems

• Automotive repair and fabrication

The alloy provides strong mechanical performance while maintaining excellent flowability during

brazing operations.

Better Brazing Starts with Better Flux

To achieve the best brazing performance, XINXIN recommends using:

QJ102 Brazing Flux

Our professional brazing flux is specially designed to:

• Remove oxides efficiently

• Improve wetting performance

• Reduce oxidation during heating

• Promote clean and reliable brazed joints

The combination of:

XINXIN 40% Brazing Filler Metal + QJ102 Brazing Flux

provides a complete professional brazing solution trusted by customers worldwide.

Why Customers Choose XINXIN WELDING

At XINXIN WELDING, we focus on delivering:

• Stable product quality

• Competitive pricing

• Fast delivery

• OEM & customized service

• Professional export support

With years of manufacturing experience in brazing materials, our products are exported to

customers across:

• Southeast Asia

• Middle East

• Europe

• South America

• Africa

We are committed to helping distributors, importers, and industrial users build stronger business partnerships through reliable welding solutions.

About XINXIN WELDING

TONGLING XINXIN WELDING MATERIALS CO., LTD.

Main Products:

• Silver Brazing Alloys

• Brass Brazing Rods

• Phos-Copper Brazing Rods

• Aluminum Welding Wire

• Brazing Flux

• Flux-Cored Brazing Materials

Contact XINXIN WELDING

Website: www.superlionwelding.com

Email: jasmine@xxhccn.com

WhatsApp: +86 137 0562 3213

XINXIN WELDING

Reliable Welding Solutions. Delivered Worldwide.

Stop Overpaying for Brazing Rods in Thailand

 Thailand’s HVAC and automotive industries are growing fast. But many distributors and contractors are still

facing the same problems:

▶European brazing rods are too expensive

▶Local supply is limited or inconsistent

A Better Alternative for Thai Market

HS221 Brass Brazing Rod – From XINXIN WELDING

We designed HS221 not just as a product—but as a solution for real working conditions in Thailand.

What Makes It Fit Thailand Market

Easy to Use for Local Workers

▶Smooth melting

▶Good flow on copper pipe

▶Works well with standard torch equipment

Works in Real Job Conditions

▶High temperature

▶High humidity

▶Outdoor installation

▶Stable performance under all conditions

Lower Cost, Same Job Done

▶Replace expensive EU brands

▶Better stability than low-end products

▶Helps distributors increase margin

▶Helps contractors win more projects

Ideal for Thai Main Applications

▶Air conditioning installation (copper pipe)

▶Refrigeration systems

▶Automotive radiator repair

▶General workshop use

Why Thai Distributors Choose Us

▶Stable quality (no batch problems)

▶Competitive pricing (easy to resell)

▶Fast sample support

▶OEM branding for local market

Looking for Thailand Partners

We are looking for long-term partners in Thailand:

▶Welding distributors

▶Brazing material importers

▶HVAC supply companies

Contact Us

TONGLING XINXIN WELDING MATERIALS CO., LTD

Brand: XINXIN WELDING

WeChat: 3486525212

WhatsApp: +86 13705623213

A connector failure rarely happens on day one.

It happens months later.

A relay spring loses its elasticity.

A terminal overheats.

A switch stops responding.

A customer files a complaint.

And suddenly, a low-cost material becomes a very expensive mistake.

Why High-Reliability Manufacturers Choose CuNi9Sn2

CuNi9Sn2 (C72500) Copper Nickel Tin Alloy was developed for applications where ordinary copper alloys simply

cannot deliver long-term reliability.

By combining the conductivity of copper with the strength of nickel and tin, CuNi9Sn2 provides an exceptional

balance of:

• High Mechanical Strength

• Excellent Fatigue Resistance

• Superior Stress Relaxation Performance

• Outstanding Corrosion Resistance

• Reliable Electrical Conductivity

• Excellent Formability and Weldability

The result? Components that maintain their performance after years of repeated use.

Designed for Critical Electrical Applications

Modern electrical systems are becoming smaller, faster, and more demanding.

CuNi9Sn2 is widely used for:

• Electrical Connectors

• Relay Springs

• Switch Contacts

• Circuit Breaker Components

• PCB Pins and Terminals

• Electronic Module Housings

• Automotive Electrical Systems

• Telecommunication Equipment

Built to Resist Harsh Environments

CuNi9Sn2 offers excellent resistance to corrosion and stress corrosion cracking, helping manufacturers extend

product life and reduce maintenance costs.

Lower Failure Rates. Higher Customer Satisfaction.

When a connector, spring, or terminal fails, the cost is often much greater than the material itself.

It may include:

• Product recalls

• Warranty claims

• Production downtime

• Brand reputation damage

Choosing CuNi9Sn2 helps reduce these risks and improves overall product reliability.

Why Work With XINXIN WELDING?

At XINXIN WELDING, we supply high-quality copper alloy materials designed to meet the demanding requirements

of global industries.

Our advantages include:

• Stable Chemical Composition

• Strict Quality Control

• Consistent Mechanical Properties

• Custom Sizes Available

• Fast International Delivery

• Professional Export Support

For customers who refuse to compromise on quality, reliability, and performance, XINXIN WELDING provides

material solutions you can trust.

XINXIN WELDING

Stronger Materials. Longer Service Life.

Reliable Copper Alloy Solutions for Global Industries.

Website: www.superlionwelding.com

Walk onto almost any refrigeration or air-conditioning job site, and you will find one common challenge:

joining different metals quickly, securely, and without leaks.

Copper tubing, brass valves, steel fittings, filter driers, compressors, and refrigeration components all require

strong, reliable joints that can withstand pressure, vibration, and temperature changes for years.

This is exactly where Platinum K Brazing Rods from XINXIN WELDING make a difference.

Designed for Copper, Brass, Steel, and Stainless Steel

Unlike ordinary phosphorus-copper brazing rods that are mainly used for copper-to-copper joints, B K Brazing

Rods are suitable for joining a wider range of metals, including:

        Copper to Brass, Copper to Steel, Copper to Stainless Steel, Brass to Steel, Stainless Steel Components,

and Refrigeration & HVAC Assemblies.

The Preferred Choice for HVAC and Refrigeration Systems

Modern air-conditioning and refrigeration systems operate under high pressure and constant vibration. Platinum

K Brazing Rods produce strong, leak-resistant joints that help maintain long-term system reliability.

Typical applications include air-conditioning installation, refrigeration system repair, copper pipe connections,

compressor assembly, condenser manufacturing, evaporator production, and heat exchanger fabrication.

Helping Technicians Work More Efficiently

B K Brazing Rods offer excellent flow characteristics and smooth wetting action, allowing the filler metal to spread

evenly through the joint. This helps reduce rework and improve productivity.

Built for Long-Term Reliability

Industrial equipment, refrigeration systems, and HVAC installations are exposed to vibration, thermal cycling, and

changing operating conditions. A quality brazed joint must remain strong year after year.

Why Professionals Choose XINXIN WELDING

At XINXIN WELDING, we understand the requirements of HVAC contractors, refrigeration engineers, and industrial

manufacturers. Our B K Brazing Rods are manufactured to deliver consistent quality, excellent brazing performance, and

reliable results across a wide range of applications.

Company Information

TONGLING XINXIN WELDING MATERIALS CO., LTD.

Brand: XINXIN WELDING

Website: https://www.superlionwelding.com/

Email: jasmine@xxhccn.com

WhatsApp: +86 13705623213

In modern industrial manufacturing, whether it’s the intricate piping of HVAC systems or the precision repair

of heavy machinery, the quality of a brazed joint often determines the lifespan of the entire assembly. For welding

engineers, finding a filler metal that offers both exceptional flow and superior strength—while minimizing hazardous

fumes—is a constant challenge.

Today, we dive deep into the flagship product of Tongling Xinxin Welding Materials: RBCuZn-C (Nickel-

Bearing Low Fuming Bronze), and explore why it is the go-to choice for high-standard manufacturing.

1. RBCuZn-C: More Than Just "Low Fuming"

RBCuZn-C is a copper-based alloy classified under the AWS A5.8 standard. Unlike standard brass rods, its

composition is meticulously optimized with the addition of Nickel (Ni) and Silicon (Si), resulting in a qualitative leap

in performance.

The "Strength" of Nickel

The inclusion of Nickel significantly boosts the tensile strength and toughness of the joint. More importantly,

it dramatically improves the wetting action on steel, cast iron, nickel alloys, and even stainless steel. This ensures

the filler metal flows smoothly into the tightest gaps, creating dense, pore-free, and high-quality joints.

The "Clean" Magic of Silicon

Acting as a deoxidizing agent, Silicon effectively controls the evaporation of zinc. This not only reduces the

annoying white fumes (zinc oxide) during brazing—creating a cleaner work environment—but also ensures the

integrity of the weld by preventing the loss of mechanical properties due to "zinc burnout."

2. Core Advantages: Stable, Fast, and Strong

Universal Compatibility

● A truly versatile alloy, ideal for oxy-acetylene brazing of steel, cast iron, copper alloys, and nickel alloys.

Excellent Machinability

● The resulting weld bead is easy to grind, turn, or machine, simplifying post-weld finishing.

Wear & Corrosion Resistance

● Thanks to the Nickel content, the weld metal exhibits superior resistance to corrosion and wear, making it

perfect for surfacing valve seats, bearings, and other high-friction components.

3. Why Choose Tongling Xinxin Welding Materials?

As a specialist in copper alloy brazing solutions, Tongling Xinxin Welding Materials provides more than

just products; we deliver welding consistency.

High-Purity Raw Materials

● We strictly source electrolytic copper to ensure minimal trace impurities and stable chemical composition

across every batch.

Precision Drawing Process

● Utilizing multi-stage precision drawing and advanced surface treatment, our rods feature a high-gloss finish

for smooth feeding without contamination.

Versatile Supply Forms

● Available in straight rods, spools, and customized brazing rings specifically designed for the refrigeration industry.

Global Technical Support

● From Southeast Asia to South Asia, our technical team provides optimized process recommendations for

refrigeration, heavy industry, and surfacing applications.

4. Key Applications: From Lab to Factory

HVAC & Refrigeration: High-efficiency brazing of air conditioner compressors, evaporators, and piping.

Automotive Parts: High-strength brazing of shift forks and tubular brackets.

Maintenance & Repair: Crack repair in cast iron and buildup of worn shaft surfaces.

Conclusion

Brazing is not just about joining; it’s about extending the performance of materials. Tongling Xinxin’s RBCuZn-C

empowers your production with the strength of nickel.

If you are looking for a brazing solution that improves efficiency, enhances the shop floor environment, and

ensures joint integrity, contact us today for sample testing.

Tongling Xinxin Welding Materials Co., Ltd.

Your Professional Partner in Copper Alloy Brazing

When it comes to high-quality brazing, a frequently asked question among professional welders and procurement

managers is: "What kind of brass rods do you all use?"

Choosing the right brass brazing rod isn't just about making two metals stick together; it's about ensuring structural

integrity, leak-proof joints, and long-term durability. At XINXIN  Welding (Tongling Xinxin Welding Materials Co., Ltd.), we

leverage over 20 years of technical expertise to manufacture industry-leading brass brazing alloys.

Here is a breakdown of the brass rods our global partners rely on every day, and how to choose the right one for

your business.

1. Our Premium Brass Rod Categories

The Industry Standard:RBCUZN-A Brass Brazing Rods

Our most demanded product is the RBCUZN-A Brass Brazing Wire/Rod. This is a specialized copper-zinc alloy

containing approximately 0.8% to 1.2% tin (Sn).

▶ Why Tin Matters: The addition of tin significantly improves the fluidity of the molten metal, refines the crystal grains,

and reduces the evaporation of zinc during welding.

▶ Key Benefits: Exceptional tensile strength, excellent corrosion resistance, and beautiful weld formation.

▶ Best For: Joining copper, steel, copper-nickel alloys, cast iron, and inlaying carbide cutting tools.

The User-Friendly Innovation: Flux-Coated Brass Rods

For operations looking to boost efficiency, we offer Flux-Coated Brass Rods that streamline production workflow.

▶ How it Works: These rods come pre-coated with a precise layer of high-performance brazing flux.

▶ Key Benefits: Eliminates the extra step of applying separate flux powder. It saves labor time, reduces material waste,

and ensures a cleaner, more consistent braze joint every single time.

2. Why Global OEMs Trust Superlion Welding

Elevate Your Welding Standards Today

Stop guessing which brass rod fits your project. Let the technical experts at XINXIN Welding guide you to the perfect solution. We don't just sell welding materials; we solve your brazing challenges.

▶ Contact us today for free samples or a customized quote: [jasmine@xxhccn.com]

▶ Explore our full catalog: www.superlionwelding.com

Better Flow. Stronger Joints. More Reliable Brazing.

When using brass welding rods, many users focus only on the welding rod itself.

However, professional brazing engineers understand that the brazing flux is one of the most important

factors affecting final brazing quality.

Even high-quality brass brazing rods can produce poor results if the wrong flux is used.

That is why professional customers worldwide increasingly choose:

HS221 Brass Brazing Rod + CJ301 Brazing Flux

From XINXIN WELDING

This combination is specially developed to provide:

• Smoother brazing flow

• Cleaner joints

• Better wetting

• Stronger bonding

• More stable brazing performance

for HVAC, refrigeration, plumbing, automotive, and industrial applications.

Why Is Brazing Flux Necessary for Brass Welding Rod?

During brass brazing, the workpiece is heated to high temperatures.

At these temperatures:

• Copper and brass surfaces oxidize rapidly

• Oxide films block filler metal flow

• Wetting performance decreases

• Brazing strength becomes unstable

Without proper flux protection, operators may experience:

• Poor flowability

• Black oxidation

• Weak joints

• Porosity

• Difficult operation

• Leakage problems

Especially in:

• Air conditioning systems

• Refrigeration copper pipes

• Heat exchangers

• Automotive radiator repair

• Brass fittings

stable brazing quality is critical.This is why CJ301 Brazing Flux is essential.

Why Choose CJ301 Brazing Flux from XINXIN WELDING?

Excellent Oxide Removal

CJ301 effectively removes oxides during heating and protects the metal surface from further oxidation.

This allows:

• Better capillary action

• Smoother filler metal flow

• Cleaner brazing appearance

• Higher joint strength

Perfect Match with HS221 Brass Brazing Rod

        Unlike ordinary fluxes, CJ301 is specially optimized for use with:

HS221 Brass Brazing Rod

This combination improves:

• Fluidity

• Joint penetration

• Brazing stability

• Heating efficiency

The result is cleaner and stronger brazed joints with easier operation.

Cleaner Brazing Performance

Low-quality fluxes often create:

• Heavy smoke

• Strong odor

• Excessive residue

• Difficult cleaning

CJ301 is designed for:

• Low residue

• Stable heating performance

• Cleaner brazing operation

• Better workshop environment

Stronger Joints = Fewer Customer Complaints

Using HS221 Brass Welding Rod + CJ301 Flux helps achieve:

• Dense brazed joints

• Excellent sealing performance

• Better vibration resistance

• Long-term durability

Save Time. Reduce Cost. Improve Efficiency.

CJ301 helps operators:

• Reduce heating time

• Improve brazing speed

• Lower rejection rates

• Reduce material waste

About XINXIN WELDING

Brand: XINXIN WELDING

Company: TONGLING XINXIN WELDING MATERIALS CO., LTD.

Main Products:

• HS221 Brass Brazing Rod

• Phos-Copper Brazing Rods

• Silver Brazing Alloys

• CJ301 Brazing Flux

• Aluminum Welding Wire

• Flux-Cored Brazing Materials

Contact Information

Website: www.superlionwelding.com

Email: jasmine@xxhccn.com

WhatsApp: +86 137 0562 3213

In recent years, global copper prices have continued to rise sharply.

From HVAC systems and refrigeration equipment to automotive manufacturing and industrial fabrication,

the entire brazing industry is feeling the pressure of increasing raw material costs.

For many customers, one important question is becoming more common:

Why are brazing rod prices increasing so quickly?

The answer is simple:

Copper is the core raw material of most brazing alloys.

And when copper prices rise, brazing rod prices inevitably follow.

1.Copper Is the Foundation of Brazing Materials

Many brazing products are copper-based alloys, including:

• Brass Brazing Rods (RBCuZn Series)

• Phos-Copper Brazing Rods (BCuP Series)

• Silver Brazing Alloys

• Copper Brazing Wire

• Flux-Cored Brazing Materials

These products contain large amounts of:

• Copper (Cu)

• Zinc (Zn)

• Silver (Ag)

• Tin (Sn)

Among them, copper is usually the largest cost component.

For example:

• HS221 Brass Brazing Rod contains over 58% copper

• Phos-copper rods may contain over 90% copper

• Silver brazing alloys also rely heavily on copper as the base metal

This means:When copper prices increase, production costs increase immediately.

2.Why Is Copper Price Rising?

Several global factors are driving copper prices higher:

Strong Global Demand

Copper demand is growing rapidly in:

• HVAC systems

• Refrigeration equipment

• Electric vehicles

• Solar energy

• Power grids

• Construction industries

Tight Supply

Global mining supply remains limited.

Factors such as:

• Mine disruptions

• Higher mining costs

• Shipping delays

• Energy price increases

have created supply pressure in the copper market.

Financial & Investment Factors

Copper is now viewed as a strategic industrial metal.

Large amounts of investment capital are entering commodity markets, further pushing copper prices upward.

3.How Does This Affect Brazing Rod Prices?

When copper prices rise:

• Raw material costs increase directly

• Production costs rise immediately

• Inventory pressure increases

• Transportation and energy costs rise

As a result:Brazing rod prices must adjust accordingly.

Especially for:

• Brass brazing rods

• Phos-copper brazing rods

• Silver brazing alloys

the impact is very significant.

4.Why Stable Suppliers Matter More Than Ever

During periods of copper price volatility, choosing a reliable supplier becomes extremely important.

Professional manufacturers can help customers by:

• Maintaining stable quality

• Providing flexible production schedules

• Offering competitive pricing

• Reducing delivery risks

• Supporting long-term cooperation

This is exactly what XINXIN WELDING focuses on.

5.XINXIN WELDING — Reliable Brazing Solutions in a Volatile Market

At TONGLING XINXIN WELDING MATERIALS CO., LTD., we understand how copper market fluctuations

affect our customers.

That is why we continuously work to provide:

• Stable quality

• Competitive pricing

• Fast delivery

• Flexible packaging

• Professional export service

even during periods of rapid copper price increases.

Our Main Products

• HS221 Brass Brazing Rod

• Phos-Copper Brazing Rods

• Silver Brazing Alloys

• CJ301 Brazing Flux

• Aluminum Welding Wire

• Flux-Cored Brazing Materials

How Buyers Can Reduce Risk During Copper Price Surges

Professional buyers are now adopting smarter purchasing strategies:

• Secure raw materials earlier

• Work with stable suppliers

• Use cost-effective brazing solutions

• Build long-term partnerships

About XINXIN WELDING

Brand: XINXIN WELDING

Company: TONGLING XINXIN WELDING MATERIALS CO., LTD.

Contact Us

Website: www.superlionwelding.com

Email: jasmine@xxhccn.com

WhatsApp: +86 137 0562 3213