LOW ALLOY STEEL (High Temperature)
NEXA 9018-B3
For Heat and Creep Resisting Steel
AWS A/SFA 5.5 E9018-B3
Applications
- Welding of 2.25Cr-0.5Mo and 2.25Cr- 1Mo type creep resistant steels
- Cr-Mo and Cr-Mo-V bearing steels for high temperature applications
- Main steam pipes of boilers in electric power plant, Boiler super heaters
- Joining of P5A materials
- Suitable for 12CrMo9-10, 10CrSiMoV7 German steels
- Joining ASTM A 335 Gr.P22, A 387 Gr.22 materials
- Application in refineries, power plants, pressure vessels, boilers
Characteristics
- Basic coated iron powder electrode
- Low alloy steel Cr-Mo deposit
- Resistant to creep and heat upto 600°C
- Ductile and crack resistant and heat treatable weld
- Radiography quality weld metal
Chemical Composition
| C | Mn | Si | Cr | Mo |
|---|---|---|---|---|
| 0.05-0.12 | 0.9 | 0.8 | 2.0-2.5 | 0.9-1.2 |
Mechanical Properties
| UTS (MPa) | YS (MPa) | El% | CVN Impact (J) (0℃) | Condition | Diffusible H2 Content |
|---|---|---|---|---|---|
| >620 | >530 | >17 | >40 | PWHT: 690℃ for 1hr | <5ml/100gm |
Welding Currents (AC (70 OCV)/DCEP)
| 2.5 x 350 mm | 3.15 x 450 mm | 4.0 x 450 mm | 5.0 x 450 mm |
|---|---|---|---|
| 60-100 | 90-120 | 140-180 | 180-220 |
Product Specifications
Current Type
AC (70 OCV)/DCEP
Welding Positions
Packaging
- Standard carton packing of 20 kg box containing 4 cartons each.
Conditions (Pre-Drying)
- 250-300°C for minimum 1 hr.