STARBLAZE PRIME 2594
AWS A5.4: E2594-16 | DIN EN ISO 3581-A: E 25 9 4 N LR 12 | Werkstoff Nr. 1.4463
Superior Pitting Resistance, Super Duplex Performance, Exceptional Corrosion Resistance
A rutile-basic 25-10-4-N type non-synthetic electrode specially designed for welding 2507 super duplex stainless steels and similar compositions. StarBlaze PRIME 2594 offers exceptional resistance to pitting and crevice corrosion with a PREN value greater than 40, making it ideal for highly corrosive service environments. The low carbon weld deposit ensures excellent weldability, a spatter-free arc, smooth bead appearance, and a balanced super duplex weld structure with ferrite content in the range of 40–70 FN. Supplied in vacuum-packed packaging for optimum moisture protection and consistent welding performance.
Excellent resistance to pitting corrosion
Outstanding resistance to crevice corrosion
PREN value greater than 40
Designed for super duplex stainless steel welding
Low carbon weld deposit
Spatter-free arc characteristics
Smooth weld bead appearance
Excellent weldability
Ferrite content of 40–70 FN
Vacuum packed for enhanced moisture protection
Suitable for AC and DC+ polarity
Offshore Oil & Gas Facilities
Chemical Processing Plants
Desalination Plants
Petrochemical Industry
Marine and Shipbuilding Industries
Pulp and Paper Industry
Power Generation Facilities
Process Equipment Manufacturing
Manual Metal Arc Welding (MMA/SMAW) of super duplex stainless steels
Fabrication of corrosion-resistant process equipment
Pressure vessel and piping fabrication
Offshore structure welding
Chemical plant construction and maintenance
Marine equipment fabrication and repair
Designed for welding SAF 2507 super duplex stainless steel
Suitable for UNS S32750 and UNS J93404 grades
Compatible with ASTM A182 F53 materials
Suitable for Uranus 47N grades
Compatible with Material Numbers 1.4410, 1.4460, 1.4462 and 1.4463
Ferrite content maintained between 40–70 FN
Keep electrodes dry and avoid condensation
Re-dry at 300°C for 1 hour if required (maximum 3 cycles)
Vacuum packed for extended shelf life and moisture protection
Excellent performance in severe chloride-containing environments
Product Details
Typical Chemical Composition (%)
| C | Mn | Si | Cr | Ni | Mo | P | S | N |
| 0.03 | 1.20 | 0.50 | 25.00 | 9.50 | 4.00 | 0.015 | 0.010 | 0.25 |
Typical Mechanical Properties (All Weld Metal)
| Yield Strength Rp (N/mm²) | Tensile Strength Rm (N/mm²) | Elongation A5 (%) | Charpy Impact Value (ISO-V J RT) |
| ≥ 650 | ≥ 800 | ≥ 20 | ≥ 50 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 50-80 |
| 3.15 | 70-110 |
| 4.00 | 100-150 |
| 5.00 | 140-190 |
