Product description
– Basic flux-cored wire for gas-shielded arc welding.
– Totally sealed copper wire with high filling coefficient and deposit rate.
– Suitable for single and multi-pass welding of modified 9Cr-1Mo steels.
– Strict control of the composition of the deposited metal ensures mechanical strength, toughness, resistance to oxidation and thermal fatigue, and resistance to high-temperature corrosion.
– Optimum productivity by combining the advantages of tubular and staple-coated wires.
– HDM guaranteed at < 4 ml/ 100g of metal deposited over the entire range of usable parameters.
– No moisture regain, excellent unwinding properties.
Product application instructions
FCW B P91 is designed to weld refractory steels of type 9CrMo (P91/T91) with additions of niobium, vanadium and nitrogen to improve creep properties.
Thermal power plants, high-pressure steam plants, industrial boilers, high-temperature pipelines, and the nuclear industry.
Welding positions: EN ISO 6947: PA, PB | ASME IX: 1G, 1F, 2F
Classification
| ASME IIC SFA-5.29 | EN ISO 17634-B |
|---|---|
| E90T5-G H4 | T69T5-0G-9C1MV-H5 |
Chemical analysis (%)
| C | Mn | If | Cr | Ni | Mo | Nb | V | N | S | P |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.1 | 0.7 | 0.2 | 9.2 | 0.8 | 1.0 | 0.05 | 0.2 | 0.03 | 0.008 | 0.008 |
Mechanical characteristics
| Rm (MPa) | Rp0.2 (MPa) | A5 (%) | KCV | |
|---|---|---|---|---|
| 820 | 750 | 17 | 20°C: 120 J | PWHT 4h/ 750°C |
Why choose this cored wire?
Welding P91 requires very specific consumables, capable of guaranteeing the mechanical integrity and temperature resistance of this low-alloy steel. Opting for a basic flux-cored wire is an ideal solution for combining metallurgical quality, operational performance and high productivity.
Benefits of FCW B P91 :
Excellent high-temperature resistance: the deposited metal retains its mechanical properties up to 600°C, ideal for applications in thermal, nuclear or industrial power plants.
– Composition perfectly adapted to P91: the basic cored wire enables precise reproduction of the required chemical analysis (Cr-Mo-V-Nb).
-Less cracking: basic slag reduces the risk of hot or cold cracking, a major issue with this steel.
-Excellent weldability: stable arc, even penetration and low spatter rate.
-Excellent controlled delta ferrite content: to guarantee the metallurgical balance required by P91 specifications.
-Increased productivity: higher deposition rate than a coated electrode or solid wire, with better overall yield.
