SJ301 Fused Flux
The reliable choice for carbon steel & structural fabrication
TOKO SJ301 is a fused type submerged arc welding flux designed for high-productivity welding of carbon steel, mild steel, and marine-grade steel. With excellent resistance to moisture pickup and porosity, it delivers smooth, consistent bead appearance and easy slag removal — ideal for automated welding lines and mass production.
- Low hydrogen content (≤5ml/100g)
- Suitable for AC and DC welding
- Excellent slag detachability
- Low moisture absorption
- Stable arc & smooth bead
- Cost-effective for high-volume jobs
Type
Fused
Basicity
1.5 – 2.0
Hydrogen Content
≤5 ml/100g
Matching Wire
AWS A5.17 EM12K
Current Type
AC / DC
Impact Temp.
-20°C
🔧 Technical Properties
- Flux Type Fused (neutral)
- Grain Size 10 – 60 mesh
- Bulk Density 1.2 – 1.4 g/cm³
- Moisture Content ≤0.10%
- Phosphorus (P) ≤0.040%
- Sulfur (S) ≤0.030%
- Recommended Preheating 100 – 150°C (as required)
⚙️ Welding Parameters
- Current Range 400 – 1200 A
- Voltage Range 26 – 44 V
- Travel Speed 25 – 80 cm/min
- Wire Diameter 2.0 – 5.0 mm
- Heat Input 1.5 – 4.5 kJ/mm
- Electrode Extension 20 – 35 mm
- Joint Type Butt, Fillet, Lap
🏗️ Key Applications
🚢 Shipbuilding & Marine
🏗️ Structural Steel (Buildings & Bridges)
⚙️ Pressure Vessels & Boilers
🏭 Heavy Machinery & Equipment
🛤️ Railway & Automotive Components
🛢️ General Fabrication & Storage Tanks
📄 Technical Documents & Support
Download the SJ301 datasheet, safety data sheet, or request WPS support from our welding engineers.
📞 For bulk orders, custom formulations, or technical consultation, contact us at
office@tokoc.com or call (+86) 510-8359 5138.