StarBlaze Prime 347
AWS A5.4: E347-16 | DIN EN ISO 3581-A: E 19 9 Nb R 12 | DIN EN 1600: E 19 9 Nb R 12 | Werkstoff Nr: 1.4550
Rutile Coated | Nb-Stabilized Austenitic | General Purpose for Cr-Ni Stainless Welding
StarBlaze Prime 347 is a rutile-basic coated stainless steel electrode with Nb-stabilized austenitic weld metal and approx. 5–8% ferrite. Designed for joining stabilized and unstabilized Cr-Ni stainless steels such as 304, 304L, 321, and 347, it ensures excellent resistance to intergranular corrosion while delivering smooth arc performance, low spatter, and self-peeling slag. Suitable for both flat and positional welding, particularly in chemical, food, and general stainless fabrication.
- Available Packs
- Dimensions: 2.50 mm x 350 mm, 3.15 mm x 450 mm, 3.20 mm x 450 mm, 4.00 mm x 450 mm, 5.00 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 requestVacuum sealed (LMA type) for moisture resistance
- Nb-stabilized weld deposit prevents sensitization during thermal cycling
- Weld metal composition: 19.0% Cr, 10.0% Ni, 0.45% Nb
- Excellent mechanical properties: 590 N/mm² tensile strength, 40% elongation, 80 J impact
- Smooth bead with soft fusion and excellent restriking characteristics
- Ideal for both structural and clad welding in stainless assemblies
- Suitable for temperatures up to 400°C in chemical and food industry use
- Food and beverage process equipment
- Pharmaceutical-grade stainless piping
- Chemical and refinery vessels and tanks
- General stainless structural fabrication
- Heat exchanger and sheet cladding
- Shielded Metal Arc Welding (SMAW / MMA)
- Polarity: AC or DC
- Current range:
- 2.50 mm: 50–80 A
- 3.15 mm: 70–110 A
- 3.20 mm: 70–110 A
- 4.00 mm: 100–150 A
- 5.00 mm: 140–190 A
- Welding positions: 1G/PA, 2F/PB, 2G/PC, 3G/PF, 4G/PE
- Interpass temperature: < 200°C
- Redrying not usually needed; if exposed, re-dry at 300–350°C for 1 hour
- Suitable for both pipe and plate welding of stabilized stainless steels
- Recommended for welds requiring corrosion and thermal fatigue resistance
- Delivers clean finish with minimal slag post-weld
Product Details
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | Cr | Ni | S | P | Nb |
| 0.04 | 0.80 | 1.00 | 19.0 | 10.0 | 0.015 | 0.020 | 0.45 |
Typical Mechanical Properties (All Weld Metal)
| Tensile Strength Rm (N/mm2) | Elongation A5 (%) | Charpy Impact Value (ISO-V J RT) |
| 590 | 40 | 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 |
