Qu4550 Bobbin – Stainless Steel Laser Welding Wire 1.4550 (X6CrNiNb18-10 / AISI 347)
€184.45
Qu4550 Bobbin – Stainless Steel Laser Welding Wire 1.4550 (X6CrNiNb18-10 / AISI 347)
Qu4550 is a niobium-stabilized stainless steel laser welding wire to DIN EN 10028-7 for apparatus, vessel and pressure-vessel construction. Thanks to niobium stabilization, the material 1.4550 (X6CrNiNb18-10 / AISI 347) stays reliably resistant to intergranular corrosion even after welding — subsequent solution annealing is not required.
Recommended base materials
- 1.4550 — X6CrNiNb18-10 / AISI 347 (primary material)
- 1.4551 — Nb-stabilized CrNi austenite (identical type)
- 1.4541 — X6CrNiTi18-10 / AISI 321 (Ti-stabilized, closely related)
Typical applications
- Apparatus, vessel and pressure-vessel construction (DIN EN 10028-7)
- Furnace, heating and heat exchanger construction
- Exhaust systems and high-temperature components
- Components under thermal cyclic load
- Repair welding on similar stainless steels
Advantages of 1.4550
- Niobium stabilization prevents intergranular corrosion at weld seams
- Resistant even after welding — no solution annealing required
- Heat-resistant austenite for furnace and plant construction
- Weld metal: yield 205 MPa, tensile 520 MPa, elongation 35 %
Bobbin form: K125, K250, K80, MA125, SH253 — wire weight 100 g–500 g, Ø 0,3 mm – 0,6 mm.
Material analysis (wt.-%)
C 0.08 | Si 0.80 | Mn 1.50 | P 0.045 | S 0.015 | Cr 18.0 | Ni 10.5 | Nb 0.80 | Fe balance
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| Bobbin size: | K80, K125, K250, MA125, SH253 |
|---|---|
| Bobbin weight: | 100 g, 200 g, 500 g |
| Diameter: | 0,3 mm, 0,4 mm, 0,5 mm, 0,6 mm |
| Recommendations for basis material: | 1.4550, 1.4551 |
| Wire: | Laser welding wire |
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