Conform to GB/T 5118 E6215-2C1M, Equivalent to AWS A5.5 E9015-B3
Instruction
E9015-B3 is a 2.5Cr-1MO hot-strength steel electrode with a low hydrogen sodium type coating. Adopt DC reverse connection, narrow track, short arc operation, welding
The welding process performance is excellent, and all-position welding can be carried out.
Application
It is suitable for welding pearlitic heat-resistant steel structures with a working temperature below 550 °C, such as high temperature and high-pressure pipelines, synthetic chemical equipment
equipment, petroleum cracking equipment, etc., including 2.5Cr1Mo tube sheets and ASME SA- 182/SA- 182M-F22 forgings,
SA-213/SA-213M-T22 pipe, SA-335/SA-335M-P22 pipe, SA-387/SA-387M Gr.22 plate, etc.
Chemicals of Welding deposited metal
| Alloy wt% | C | Mn | Si | Cr | Mo | P | S |
| Standard | 0.15-0.12 | ≤0.90 | ≤1.00 | 2.00-2.50 | 0.90-1.20 | ≤0.025 | ≤0.015 |
| e.g. | 0.065 | 0.75 | 0.32 | 2.20 | 1.05 | 0.009 | 0.011 |
Mechanical properties of deposited metal
| Properties | Tensile
Strength/MPa |
Yield
Strength/MPa |
Elongation
/% |
Charpy Value KV2/J
(normal ℃) |
Heat
Treatment ℃ x h |
| Standard | ≥620 | ≥530 | ≥15 | ≥54 | 675-705 ℃ 1h |
| e.g. | 680 | 575 | 19 | 140 | 690 ℃ 1h |
Recommended welding parameters
| Dia. | 3.2mm | 4.0mm | 5.0mm |
| Current (A) | 90-120 | 140-180 | 170-210 |
Notes:
- The electrode must be baked at 350°C for 1 hour before use;
- Oil, water, rust and other impurities on the surface of the weldment must be removed before welding;
- Use short arc narrow pass welding;
- The preheating and inter-pass temperatures are 160-190°C.
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