| Quantity: | |
|---|---|
200mesh 325mesh
SEPPE BAUXITE
25083000
High alumina bauxite powder for submerged arc welding (SAW) flux and other welding flux formulations.
▸ Bauxite powder used as welding flux is a high-alumina, low-impurity mineral product obtained by calcining and precisely milling selected raw bauxite. Available in 200 mesh and 325 mesh sizes, it serves as a key component in submerged arc welding (SAW) fluxes and other welding flux formulations. Its high alumina content helps control slag viscosity, stabilize the arc, and refine the weld metal, while its consistent chemistry ensures repeatable welding performance and high-quality weld beads.
▸ From bauxite ore to finished sand, every stage is controlled to ensure consistent quality:
01 — Raw Material & Supply · Own mines, Al₂O₃ ≥ 65%
02 — Calcination Process · Rotary kiln at 1450–1550°C
03 — Processing & Grading · Crushing, screening & magnetic separation
04 — Testing & Delivery · Full lab testing & global packaging
▸ Our calcined bauxite powder offers key advantages for welding flux manufacturers:
▸ Controlled Alumina Content — 75-87% Al₂O₃ range allows flux formulators to adjust slag basicity and viscosity precisely.
▸ Low Impurity Levels — minimized Fe₂O₃ and alkali content prevents unwanted weld metal contamination and hydrogen pickup.
▸ Consistent Particle Size — 200 mesh and 325 mesh options ensure uniform melting behavior and stable arc characteristics.
▸ Batch-to-Batch Uniformity — tight quality control guarantees consistent flux performance across production runs.
▸ XRF Chemical Analysis — every batch tested for Al₂O₃, Fe₂O₃, TiO₂, CaO, MgO, K₂O, Na₂O content
▸ Particle Size Analysis — laser diffraction to verify 200 mesh or 325 mesh specification
▸ Bulk Density Measurement — consistent density ensures predictable flux feeding and melting
▸ Magnetic Separation Inspection — removal of iron contamination to meet stringent specifications
▸ Batch Traceability — full documentation from raw ore source to shipping container
▸ Adjustable Alumina Content — 75-87% Al₂O₃ range allows precise control of slag properties for different welding applications.
▸ Stable Arc Performance — consistent chemistry and particle size ensure smooth, stable arc and uniform weld beads.
▸ Low Impurity Levels — minimal iron and alkali content reduces risk of weld defects and hydrogen-induced cracking.
▸ Dual Mesh Availability — 200 mesh and 325 mesh options provide flexibility for different flux formulations and melting rates.
▸ Consistent Quality — batch-to-batch uniformity ensures predictable flux performance in every production run.
▸ Submerged arc welding (SAW) flux formulations
▸ Flux-cored wire fillers
▸ Electroslag welding flux
▸ Welding powder and agglomerated flux production
| Chemical Composition | |
| Al₂O₃ | 75 - 87% |
| TiO₂ | 2 - 3% |
| SiO₂ | 6 - 18% |
| Fe₂O₃ | 0.5 - 2.5% |
| P₂O₅ | 0 - 0.3% |
| MgO | 0 - 0.2% |
| CaO | 0 - 0.4% |
| K₂O + Na₂O | 0 - 0.4% |
| Physical Properties | |
| Appearance | Fine Grey/Tan Powder |
| Available Mesh Sizes | 200 Mesh, 325 Mesh |
| Specific Gravity | ≥ 3.70 g/cm³ |
| Bulk Density | 2.80 - 3.25 g/cm³ |
| Hardness | 7.5 - 9.0 Mohs |
| Refractoriness | ≥ 1770℃ |
| LOI | 0.1 - 0.5% |
| Grade | Al₂O₃ Content | Main Application |
| Standard Welding Flux | 75% Min | General purpose SAW flux, cost-effective formulation |
| Premium Welding Flux | 80% Min | High-performance SAW flux, pipe welding, structural steel |
| High-Purity Welding Flux | 85-87% Min | Critical applications, low-hydrogen flux, high-strength steel |
▸ SEPPE controls the entire production chain — from high-grade bauxite ore selection to fully integrated calcination, fine grinding, and global logistics. Our advanced laboratory monitors every batch for chemical consistency and particle size distribution, ensuring your welding flux raw material performs predictably and consistently.
▸ With established supply to over 40 countries and dedicated technical support, SEPPE helps welding flux manufacturers achieve stable arc performance, minimize weld defects, and maintain efficient production. Flexible packaging, private labeling, and OEM services are available.
▸ 25 kg bags, 50 kg bags, 1 MT jumbo bags
▸ 20' FCL: approx 25-27 MT
▸ Private labeling and custom packaging available
▸ It is used as a key component in submerged arc welding (SAW) fluxes to control slag viscosity, stabilize the arc, and refine the weld metal composition.
▸ 200 mesh is commonly used for standard SAW flux formulations, while 325 mesh offers finer particle size for specialized applications requiring faster melting and smoother slag coverage. Both are available depending on your formulation needs.
▸ It depends on your flux formulation. 75-80% Al₂O₃ is typical for general-purpose fluxes, while 85-87% is used for high-performance, low-hydrogen applications. We can supply across the full range.
▸ Yes. Free samples for lab evaluation, along with TDS, SDS, and SGS test reports are available upon request.
▸ Contact SEPPE for: • Free Samples • TDS / SDS Documents • OEM Packaging Options • Bulk Container Pricing
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