StarBlaze Prime 309
AWS A5.4: E309-16 | DIN EN ISO 3581-A: E 23 12 R 12 | DIN EN 1600: E 23 12 R 12 | Werkstoff Nr: 1.4332
Buffer-Ready, Smooth Arc, Dissimilar and Cladding Specialist
Rutile-basic 23Cr–12Ni electrode with approx. 15% ferrite for welding dissimilar stainless to low alloyed steels. Suitable for buffer layers before hardfacing and cladding on 18/8 type substrates. Produces smooth, spatter-free welds with easy slag removal and stable arc re-striking, even in multi-pass repair operations.
- 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
Key Features
- High ferrite content enhances hot crack and corrosion resistance
- Smooth bead formation and self-releasing slag
- Suitable for buffer layers and dissimilar joints
- Tensile strength: 600 N/mm² | Elongation: 38%
- Charpy impact value: 60 J
- Compatible base materials: 309, 304LN, 3098, 312, X10CrA1 18, UGINOX R20-12, R24-13S
Industries
- Stainless to mild steel welding
- High-temperature plant construction
- Petrochemical and exhaust systems
- Buffer-layer deposition for hardfacing
- Civil infrastructure and cladding repairs
Processes
- Manual Metal Arc Welding (MMA / SMAW)
- DC+ compatible welding
- Multi-pass stainless overlays and transitions
- Joining of dissimilar metals (e.g., carbon to stainless)
- First layer on construction-grade 18/8 steels
- Repair welding for heavy structural parts
- Cladding buffer work on heat-stressed components
Additional Details
- Use case: Joining dissimilar steels, buffer-layer welding, and stainless overlays in high-temperature systems
- Handling: Redry at 250–300°C for 1 hour if exposed to humidity or unsealed conditions
- Storage: Maintain in sealed packaging or controlled drying cabinets
- Limitations: Not suitable for root passes or thin-walled stainless unless backed with purging
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | Cr | Ni | S | P |
| 0.05 | 0.80 | 0.80 | 23.00 | 12.50 | 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 | 38 | 60 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 60-90 |
| 3.15 | 80-120 |
| 4.00 | 110-150 |
| 5.00 | 150-180 |
