Solder Wire, Solder Paste, Solder Bar – QLG | High-Performance Electronic Assembly Solutions

About QLG Holdings

Founded in 2000, QLG is a national non-regional holding company integrating R&D, manufacturing, trade, and service of environmentally friendly solder materials, high-voltage electrical appliances, and electric power fittings.

As a leader in China's solder industry, we have earned 5 national invention patents and 10 utility model patents. Our dedicated R&D center is staffed with 5 senior experts and 6 technical engineers, all with over 10 years of industry experience.

RoHS & REACH Certified

OEM/ODM Custom Solutions

Pre-Service, In-Service & After-Service Support

Research & Development

Our state-of-the-art R&D center focuses on designing and manufacturing advanced electronic solder connection solutions. With a core team of experts boasting over a decade of experience, we continuously innovate to meet evolving industry standards.

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Advanced Testing

Strict quality control ensures every product meets IPC, RoHS, and REACH standards.

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Custom Formulations

Tailored solder alloys, flux chemistries, and preform shapes for unique applications.

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Scalable Production

From lab-scale prototypes to mass production, we support full lifecycle development.

Our Products

Sn99.3Cu0.7 Copper Tin Lead-Free Solder Wire

• 99.3% Tin, 0.7% Copper
• Melting Point: 227°C
• RoHS & REACH Compliant
• Activated Rosin Flux
• Ideal for copper tubes & plates

Sn96.5Ag3.0Cu0.5 SAC305 Solder Wire

• 96.5% Tin, 3% Silver, 0.5% Copper
• Melting Point: 217–220°C
• Bright, reliable solder joints
• High performance for precision electronics
• Available in 0.8mm diameter

Sn63Pb37 No-Clean Leaded Solder Wire

• Eutectic alloy: 63% Tin, 37% Lead
• Melting Point: 183°C
• No-clean flux, low residue
• Suitable for manual & automatic soldering
• High reliability in consumer electronics

Tin Lead Sn62.8Pb36.8Ag0.4 Solder Paste

• Mid-temperature alloy paste
• T3/T4 particle size
• No-clean type, designed for SMT
• Excellent printability & reflow stability
• High purity metal content

Type3 Tin Lead Sn63Pb37 Solder Paste

• Eutectic tin-lead alloy
• Type 3 powder (25–45μm)
• Ideal for PCB assembly
• Competitive pricing, consistent quality
• Suitable for stencil printing

Sn99.3Cu0.7 Copper Tin Lead-Free Solder Bar

• 99.3% Tin, 0.7% Copper
• Meets IPC J-STD-006C standards
• Low dross, minimal copper dissolution
• For wave, dip, and selective soldering
• High purity (≥99.9% Sn)

Tin Lead Sn/Pb Solder Bar (Leaded & Unleaded)

• High purity metal base
• Stable performance in wave soldering
• Low oxidation, reduced dross
• Available in various sizes
• Custom alloy options

Solder Preform (With & Without Flux)

• Custom shapes & sizes
• Available with no-clean or water-soluble flux
• Precise volume control
• Ideal for BGA, power modules, optics
• High repeatability in automated processes

No-Clean Liquid Solder Flux

• Low residue, non-corrosive
• Excellent wetting & spreading
• Compatible with leaded & lead-free alloys
• Suitable for dip, spray, and foam application
• Stable shelf life

QL-700A Water-Based Cleaner

• Environmentally safe, non-flammable
• Removes flux residues, oils, fingerprints
• Compatible with most substrates
• Low VOC, water-rinseable
• Ideal for post-solder cleaning

Epoxy Resin Red Glue (200g Tube)

• For PCB BGA SMT adhesive sealing
• High adhesion, thermal stability
• Red color for easy inspection
• Dispensing & stencil printing compatible
• 200g cartridge packaging

Custom Soldering Solutions

• Personalized industrial soldering solutions
• ODM/OEM manufacturing support
• Material formulation & testing
• Packaging & labeling customization
• Full technical documentation

Why Choose QLG?

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Industry Leader

5 invention patents, 10 utility model patents, and 20+ years of experience in solder technology.

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Certified Quality

RoHS, REACH, and IPC-compliant products with rigorous in-house quality inspection.

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Custom Solutions

Tailored solder alloys, fluxes, preforms, and packaging for your unique needs.

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Global Support

Pre-service, in-service, and after-service support with multilingual communication.

Frequently Asked Questions

Are your products RoHS and REACH compliant?

Yes, all our lead-free products are certified RoHS and REACH compliant. We provide full documentation upon request.

Can you provide custom solder formulations?

Absolutely. Our R&D team specializes in creating customized solder wires, pastes, preforms, and fluxes based on your specifications.

What is the minimum order quantity (MOQ)?

MOQ varies by product. We support both sample orders and bulk production. Contact us for specific details.

Do you offer OEM/ODM services?

Yes, we provide full OEM/ODM support including private labeling, custom packaging, and technical co-development.

What regions do you ship to?

We ship globally, including North America, Europe, Southeast Asia, and the Middle East, with reliable logistics partners.

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High-Performance Electronic Assembly Solutions