StarBlaze TIG 347Si
AWS A5.9: ER 347Si | EN 12072: W 19 9 Nb Si
StarBlaze TIG 347Si is a niobium-stabilised stainless steel TIG welding rod depositing a 19Cr/9Ni weld metal with added silicon for improved weld pool fluidity and appearance. It is suitable for welding 321 and 347 grade stainless steels, especially in pipe, plate, and vessel fabrication. The wire offers excellent corrosion resistance at service temperatures below 400°C and reduces the risk of intergranular corrosion due to niobium stabilisation.
Diameter: 1.60 mm, 2.00 mm, 2.40 mm, 3.20 mm, 4.00 mm
Pack Sizes: 5 kg/tube, 20 kg/box
Key Features
- Niobium stabilised for improved resistance to intergranular corrosion
- Enhanced silicon content for better weld pool fluidity and bead appearance
- High strength and elongation values
- Reliable corrosion resistance at elevated service temperatures
Industries
- Chemical processing
- Power generation
- Pressure vessel and tank manufacturing
- Heat exchanger and refinery applications
Processes
- TIG welding of stabilised austenitic stainless steels
- Fabrication of components requiring high corrosion resistance
- Welding of 347, 321, and similar stainless steel grades
Additional Details
- Recommended shielding gas: Argon
- Welding current: DC (–)
- Store in dry conditions; avoid condensation
- Materials to be welded:
- AISI 347, 321
- 1.4541 (X6CrNiTi18-10)
- 1.4301 (X4CrNi18-10)
- 1.4550 (X6CrNiNb18-10)
Product Details
Typical Chemical Composition (%)
| C | Mn | Si | Cr | Ni | Nb | S | P |
| 0.08 max | 1.50 – 2.50 | 0.65 – 1.00 | 19.50 – 21.50 | 9.00 – 11.00 | 10 *C – 1.00 | 0.03 max | 0.03 max |
Typical All-Weld Mechanical Properties
| Yield Strength (N/mm²) | Tensile Strength (N/mm²) | Elongation A5 (%) | Impact Energy ISO-V(J) 20°C |
| ≥ 400 | ≥ 550 | ≥ 30% | ≥ 65 |
