StarBlaze Prime 309L
AWS A5.4: E309L-16 | DIN EN ISO 3581-A: E 23 12 LR 12 | DIN EN 1600: E 23 12 LR 12 | Werkstoff Nr: 1.4332
LMA Coating, Spatter-Free, For Dissimilar Joints & Buffer Layers
Low carbon rutile-basic electrode with ~15% ferrite, formulated for dissimilar metal welding and high-temperature service. Produces clean, soft-fused welds with low moisture absorption and minimal spatter. Ideal for buffer layer deposition, 18/8 type cladding, and stainless-to-low alloy steel joints.
Available Packs
Dimensions: 2.50 mm x 350 mm, 3.15 mm x 450 mm, 4.00 mm x 450 mm
Pack Sizes: 2.5 Kg Pouch, 5 Kg Box
Master Box: 20 Kg, 30 Kg, 40 Kg, Customisable packaging available on request
- LMA-type low moisture pick-up coating
- Excellent weld pool control with soft arc and clean bead
- Suitable for high-temp steels, dissimilar joints, and buffer layers
- Tensile strength: 600 N/mm² | Elongation: 35%
- Charpy impact value: 80 J
- Compatible base materials: 309, 304LN, 3098, X10CrA1 18, X10CrSiG
- Cladding and stainless transition welding
- Thermal equipment fabrication
- Civil engineering repairs on mixed-metal joints
- Process piping and pressure systems
- General-purpose fabrication of 18/8 type structures
- Manual Metal Arc Welding (MMA / SMAW)
- DC+ compatible welding
- Buffer and cladding base layer deposition
- Welding of dissimilar joints (carbon to stainless)
- Multi-pass repairs on stainless steel fabrications
- Positional stainless welding with refined arc control
- Overlay welding prior to hardfacing
- Use case: Welding of low carbon 309 stainless steel for buffer layers, dissimilar joints, and high-temp overlays
- Handling: Redry at 250–300°C for 1 hour if exposed to moisture or ambient air
- Storage: Keep sealed or store in heated drying cabinets to prevent hydrogen absorption
- Limitations: Not recommended for corrosive liquid containment or cryogenic-grade service without ferrite balancing
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | Cr | Ni | S | P |
| < 0.03 | 0.90 | 0.90 | 23.0 – 25.0 | 12.50 – 14.00 | 0.010 | 0.025 |
Typical Mechanical Properties (All Weld Metal)
| Tensile Strength
Rm (N/mm2) |
Elongation
A5 (%) |
Charpy Impact Value
(ISO-V J RT) |
| 600 | 35 | 80 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 50-80 |
| 3.15 | 70-110 |
| 3.20 | 70-110 |
| 4.00 | 100-150 |
| 5.00 | 140-190 |
