RW 347 - Nr.1.4551
RW 347 / RW 347SI Stainless Welding Wire: Niobium-Bearing Austenitic Stainless Welding Wires
RW 347 / RW 347SI is used for AISI 347, AISI 321 and similar Cr-Ni stainless steels containing niobium, titanium or tantalum.
Niobium Addition Reduces chromium carbide precipitation risk at grain boundaries and supports intergranular corrosion resistance.
Lower Silicon Level RW 347 helps reduce hot-cracking sensitivity.
Silicon Addition RW 347SI is the version for stainless steels containing niobium, titanium or tantalum and operating up to 400°C.
RW 347 / RW 347SI Stainless Welding Wire: References and Comparable Standards
Stainless welding wires references and comparable standards
| Product |
Nominal Composition |
EN ISO 14343-B: 2017 |
AWS A5.9-2017
Alloy Designation |
DIN Werkstoff Nr. |
| RW 347 |
19 9 Nb |
SS347 |
ER347 |
1.4551 |
| RW 347SI |
19 9 Nb Si |
SS347Si |
ER347Si |
1.4551 |
RW 347 / RW 347SI Stainless Welding Wire: Chemical Composition (Cast Analysis) (%)
Stainless welding wires chemical composition values
| Element |
RW 347 |
RW 347SI |
| C |
≤ 0,08 % |
≤ 0,08 % |
| Mn |
1,00-2,50 % |
1,00-2,50 % |
| Si |
0,30-0,65 % |
0,65-1,00 % |
| S |
≤ 0,020 % |
≤ 0,020 % |
| P |
≤ 0,030 % |
≤ 0,030 % |
| Cr |
19,0-21,0 % |
19,0-21,0 % |
| Ni |
9,0-11,0 % |
9,0-11,0 % |
| Mo |
≤ 0,30 % |
≤ 0,30 % |
| Cu |
≤ 0,30 % |
≤ 0,30 % |
| N |
- |
- |
| Nb |
10xC-1,00 % |
10xC-1,00 % |
| Ti |
- |
- |
Published:
01 January 2025
|
Last Updated:
08 June 2026
