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Borax flux 500 g for brass soldering and welding, fluoride-free fine crystalline powder, purity 99.9%, for removing oxides and impurities, for soldering baths and hard solders

Availability: Available 1-3 pcs

Delivery: The price does not include any possible payment costs check the delivery methods

Price: €3.59 3.59

Net price: €2.92

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Product code: AGT-121

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Description

Borax Flux 500 g is a high-quality agent designed for brazing and soldering with brass alloys, effectively removing oxides and surface contaminants from metals.

Advantages and Unique Features

High chemical purity – minimum 99.9% main ingredient
Fine crystalline form for easy application
Fluoride-free – safe for users and materials
Soluble in hot water
Complies with PN-EN ISO 18496 / FH21 standard

Properties and Applications

Chemical activity: effectively removes oxides and impurities from metal surfaces before soldering
Material compatibility: safe for use with most brass alloys
Application methods: suitable for solder baths, direct use or as a dissolved solution
Thermal resistance: suitable for high-temperature operations (melting point 741°C)

Technical Specifications

Parameter	Value
Appearance	White fine crystalline powder
Density (20°C)	1.719 g/cm³
Melting point	741°C
Granulation +1.18 mm	max. 4%
Granulation -0.06 mm	max. 4%
Main ingredient content	min. 99.90%
Boron oxide content	~37%
Sodium oxide content	~16.5%
Chloride content	max. 70 mg/kg
Sulfate content	max. 135 mg/kg
Iron content	max. 10 mg/kg
Shelf life	3 years
Solubility in hot water	Yes

Storage Recommendations

Store the product in tightly closed containers, in a dry, cool, and well-ventilated area at 5–25°C. Avoid contact with oxidizing agents.