Basic type agglomerated flux
2.5 (high basic)
1.0 g/cm3
10-60 mesh
25 kg plastic valve bags, 500/1000 kg large bags
A high basicity sintered flux with very low sulfur and phosphorus content, providing excellent low temperature impact toughness and crack resistance.
The high basic slag system produces very clean weld metal with low inclusion content, suitable for welding critical pressure vessels and heavy structures.
When paired with nickel-alloyed wires (such as W106, W108), suitable for welding low temperature pressure vessel steels (3.5Ni, 5Ni) requiring impact toughness down to -60C to -100C.
Suitable for nuclear power equipment, LNG storage tanks, cryogenic pressure vessels, and other critical applications requiring ultra-low temperature toughness.
| SiO₂+TiO₂ | CaO+MgO | Al₂O₃+MnO | CaF₂ | S | P |
| 10-20 | 35-45 | 15-25 | ~20 | <0.02 | <0.03 |
| Wire | Yield >=MPa | Tensile >=MPa | Elongation >=% | Impact -60C >=J |
| Ni-alloyed (W106) | 400 | 490-650 | 22 | 27 |
High basic sintered flux with high moisture absorption. Must be dried at 300-350C for 2 hours before use. For cryogenic applications, strict moisture control is essential.
Wire cleaning: Use properly cleaned wire with low residual elements. Wire chemistry must be qualified for the required low temperature service.
Groove cleaning: Extreme cleanliness required. Remove all oil, rust, paint, and moisture from groove and adjacent areas. Preheat per WPS requirements.
Parameter selection: Conduct full process qualification including Charpy impact testing at the required service temperature. Interpass temperature and heat input control are critical for low temperature toughness.
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Moisture control is critical for submerged‑arc welding fluxes. Our standard packaging is 25‑kilogram multi‑layer kraft paper bags lined with heavy‑duty moisture‑proof plastic bags. For extreme environments or ultra‑low hydrogen requirements (such as H5 grade), we can also provide custom heavy‑duty aluminium foil vacuum packaging. All goods are stacked on wooden pallets and tightly wrapped with multiple layers of industrial shrink film to ensure 100% dryness upon arrival at the port.
No. For High-Grade Oil & Gas pipeline fabrication (such as API X60 to X70), standard neutral fluxes like 301 or active fluxes like 501 are not suitable, as they cannot guarantee the required extreme low-temperature impact toughness. You must use our dedicated pipeline-grade Fluoride-Basic agglomerated flux, GJ-101Q (or GJ-101G), combined with Mo/Ni-alloyed wires (e.g., EA2 or S3Ni1Mo).This combination ensures zero loss of alloying elements and guarantees impact values of ≥27J(or much higher) at -40°C to -50°C.
Our standard MOQ for international orders is normally 5 tons per item. For a full 20‑foot FCL container, the loading capacity is usually 24 tons subject to container space constraints, and it can reach 27 tons without pallets. A 40HQ high‑cube container can hold a maximum of 28 tons. Backed by our robust production capacity, we can finish production, quality inspection and packaging within 7‑10 days upon receiving the deposit, and deliver the goods to major Chinese ports such as Qingdao Port or Tianjin Port.
Yes! We fully understand that re-baking costs time and electricity. For customers who want to skip this step, we highly recommend selecting our Heavy-Duty Aluminum Foil Vacuum Packaging. The flux is vacuum-sealed immediately after high-temperature manufacturing. When you open the bag in your workshop, the flux is in a 100% factory-dry state and can be poured directly into the welding hopper for immediate use.
For structural steel with surface impurities like rust, oil, or mill scale, standard neutral or high-basic fluxes will likely cause porosity. You need our GJ-501A (Aluminate-Rutile Active Flux). It features a highly active deoxidizing slag system that offers exceptional tolerance to surface contaminants. This allows you to achieve flawless, X-ray quality welds at high speeds without rigorous pre-weld grinding, significantly boosting your shop floor efficiency.
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