Description
Characteristics:
LKE-9015-B91H4 is is designed to weld martensitic 95% Cr & 1% Mo-V steels known by the designations T91, P91 or Grade 91. These steels are designed to provide improved creep strength, fatigue, oxidation, and corrosion resistance at elevated temperatures. It also provides good weld metal ductility and high charpy values at room temperature.
Applications:
It is suitable for welding of Pipeline, Petrochemical and Power Generation
Notes on Usage:
1.Preheat at 80°C is sometime required according to base metal or its thickness.
2.Do not exceed the range of recommended because over heat input might decrease the impact value.
3.Keep the arc as short as possible.
4.Take the back-step method at the arc starting to prevent blowholes.
Classification:
AWS A5.5 E9015-B91H4
Welding position:
Typical chemical composition of weld metal (wt%)
| C | Mn | Si | V | Cr | Ni | Mo |
| 0.10 | 0.75 | 0.8 | 0.21 | 8.55 | 0.21 | 0.93 |
Typical mechanical properties of weld metal
| YP N/mm² | TS N/mm² | EL % | IV -20°C J | PWHT |
| 580 | 720 | 25 | 50 | 620°C x1hr |
Sizes and recommended current range (AC or DC+)
| Diameter (mm) | 3.2 | 4.0 | 5.0 | |
| Length (mm) | 350 | 450 | 450 | |
| Amps | F | 90-130 | 130-180 | 180-240 |
| V&OH | 80-120 | 110-160 | 150-200 | |
| Weight per pack (kg) | 5 | 5 | 5 | |
| Weight per carton (kg) | 20 | 20 | 20 | |
