STARBLAZE PRIME 309 LMO
AWS A5.4: E 309LMo-16 | DIN EN 1600: E 23 12 2 LR 12 | DIN EN ISO 3581-A: E 23 12 2 LR 12 | Werkstoff Nr. 1.4459
Universal Repair Electrode, Dissimilar Metal Welding, Superior Corrosion Resistance
A low carbon rutile-basic coated 23Cr-13Ni-2.5Mo stainless steel electrode with controlled ferrite content of 15–25%, specially designed for welding AISI 309 and 316L stainless steels as well as dissimilar joints between mild steel, low alloy steel, and stainless steel. StarBlaze PRIME 309LMo offers excellent resistance to cracking, corrosion, and oxidation while providing soft fusion characteristics, spatter-free arc performance, very easy slag removal, and excellent bead appearance. It is also ideally suited as an intermediate layer for 316L type cladding and serves as a versatile maintenance and repair electrode for a wide range of industrial applications. Supplied in vacuum-packed packaging for optimum moisture protection and welding performance.
Available Packs
Dimensions: 2.50 mm x 350 mm, 3.15 mm x 350 mm, 4.00 mm x 350 mm, 5.00 mm x 450 mm
Pack Sizes: 2.5 Kg Vacuum Pack, 4 Kg Vacuum Pack, 5 Kg Vacuum Pack
Master Box: 20 Kg, 30 Kg, 40 Kg, Customisable packaging available on request
Low carbon stainless steel weld deposit
15–25% ferrite content for enhanced crack resistance
Excellent corrosion resistance
High oxidation resistance
Ideal for dissimilar metal welding
Suitable for stainless steel to carbon steel joints
Excellent as a buffer layer for cladding applications
Universal repair and maintenance electrode
Soft fusion characteristics
Spatter-free arc performance
Very easy slag removal and restriking
Suitable for AC and DC+ polarity
Chemical Processing Plants
Petrochemical Industry
Power Generation Plants
Pressure Vessel Manufacturing
Maintenance and Repair Services
Steel Processing Industries
Process Equipment Fabrication
General Industrial Fabrication
Manual Metal Arc Welding (MMA/SMAW) of stainless steels
Dissimilar welding of carbon steel to stainless steel
Joining low alloy steels to stainless steels
Intermediate layer welding for stainless steel cladding
Maintenance and repair welding
Pressure vessel fabrication
Process piping and equipment welding
Designed for welding AISI 316L, 316Ti, 316Cb, 309 and 309Cb stainless steels
Suitable for Werkstoff No. 1.4401, 1.4404 and 1.4571 grades
Recommended for dissimilar joints between low alloy steels and stainless steels
Excellent choice for intermediate layers in 316L type cladding systems
Can be used as a universal maintenance and repair electrode
Controlled ferrite content of 15–25% enhances crack resistance
Keep electrodes dry and avoid condensation
Maintain interpass temperature below 200°C
Re-drying is generally not required
If necessary, re-dry at 300–350°C for 1 hour
Supplied in vacuum-packed packaging
Product Details
Typical Chemical Composition (%)
| C | Si | Mn | Cr | Ni | Mo | S | P |
| 0.03 | 0.90 | 1.00 | 23.50 | 13.00 | 2.50 | 0.012 | 0.015 |
Typical Mechanical Properties (All Weld Metal)
| Tensile Strength Rm (N/mm²) | Elongation A5 (%) | Charpy Impact Value (ISO-V J RT) |
| 650 | 36 | 70 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 50-80 |
| 3.15 | 80-110 |
| 3.20 | 80-110 |
| 4.00 | 100-140 |
| 5.00 | 150-180 |
