IDENTIFICATION
Griduct 98B9, E 9018-B9
CLASSIFICATION
AWS /SFA 5.5: E 9018-B9
DESCRIPTION
Non-synthetic Hydrogen controlled, heavy coated basic type electrode depositing 9Cr-1Mo-0.2V-N-Nb alloyed weld metal.
Deposited weld metal has excellent creep strength, toughness and fatigue life and oxidation and corrosion resistance at elevated temperature upto 620°C.
WELD METAL ANALYSIS (RANGE) %
| C | Mn | Si | S | Ni | P | Cr | Mo | V | Nb | N | Al | Cu |
| 0.08 - 0.12 | 0.4 - 0.12 | 0.2 - 0.30 | 0.01 | 0.8 | 0.01 | 8.0 – 10.5 | 0.9 - 1.20 | 0.15 - 0.25 | 0.02 - 0.07 | 0.02 - 0.07 | 0.02 | 0.04 |
| max | max | max | max | max |
MECHANICAL PROPERTIES (RANGE) PWHT 755±50C/2hrs.
| UTS (MPa) | PS (MPa) | EL (%) (L=4D) | CVN Impact Value | |
| Temp | Joules | |||
| 630 - 740 | 530 - 620 | 17 - 24 | 20°C | 47 min |
TYPICAL APPLICATIONS
• For welding of P91, T-91 material-pipes, tubes etc.
MICROSTRUCTURE : In PWHT condition, the microstructure consists of tempered martensite.
REDRYING TEMPERATURE FOR ELECTRODES : 350°C / 2 hrs
HARDNESS OF THE WELD METAL AFTER PWHT : 260 VPN max.
WELDING POSITION :
PACKING PARAMETERS
| Size (mm) | Length (mm) | Amps | Packing / Box (kg) | Packing / Box (Pcs) |
| AC (70 OCV / DC+) | ||||
| 2.5 | 350 | 60 - 90 | 5 x 4 = 20 | 160 x 4 = 640 |
| 3.15 / 3.20 | 450 | 90 - 140 | 5 x 4 = 20 | 110 x 4 = 440 |
| 4 | 450 | 130 - 180 | 5 x 4 = 20 | 70 x 4 = 280 |
| 5 | 450 | 160 - 220 | 5 x 4 = 20 | 45 x 4 = 180 |