Flux Core Welding Wire
Product: E71T-11
Shielding gas: Titanium oxide CO2 gas
Features: Excellent welding process performance, soft and stable arc, small spatter, easy slag removal, beautiful weld formation
Welding position: flat welding, horizontal welding, various welding can be performed...
Flux Core Welding Wire E71T-11
DESCRIPTION:
Flux Core Welding Wire E71T-11 is a titanium oxide CO2 gas shielded flux-cored welding wire with excellent welding process performance, soft and stable arc, small spatter, easy slag removal, and beautiful weld shape. It is suitable for flat welding and horizontal welding, and can be welded in all positions with high welding efficiency. The weld metal is toughened with trace elements, which has excellent low-temperature toughness, good crack resistance, and stable and reliable internal quality
APPLICATION:
Flux Core Welding Wire E71T-11 is used for welding structural parts of carbon steel and low-alloy structural steel with tensile strength ≥490MPa. It is most widely used for welding of important structures such as shipbuilding, machinery manufacturing, pressure vessels, boilers, petroleum machinery, chemical machinery, hoisting machinery, etc
ATTENTION:
1. Use DC reverse connection.
2. When welding, the flow of Co2 gas should be 20~25L/min.
3. The dry elongation of the welding wire should be controlled within the range of 15~25mm.
4. The weldment must be cleaned of rust, oil stains, moisture and other impurities before welding.
5. The welding wire should be used as soon as possible after the package is opened. Do not expose the unused welding wire to the air.
Chemical composition of weld metal (%)
| C | Mn | Si | S | P | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|
| ≤0.12 | 0.8-1.8 | 0.3-0.9 | ≤0.035 | ≤0.035 | ≤0.20 | ≤0.50 | ≤0.15 |
Mechanical properties
| Item | Yield strength | Tensile Strength | Elongation |
| Rm/MPa | Rel/Rp0.2 MPa | A/% | |
| Standard | ≥400 MPa | ≥485 MPa | ≥22% |
| Samples | 430-480 MPa | 510-560 MPa | 24-26% |
Typical application scenarios
E71T-11 is widely used in various scenarios requiring efficient and reliable welding.
Building steel structure
Suitable for outdoor welding operations such as bridges, industrial plants, and high-rise building frames. No gas protection is required, and all-position welding can be completed efficiently.
Pipeline welding
On-site installation of oil and gas pipelines, water pipelines, etc. is especially suitable for outdoor long-distance pipeline welding, with excellent wind resistance and stable weld quality.
Heavy machinery manufacturing
Welding of high-strength steel structures such as excavator booms, crane structures, and mining equipment, with high weld strength, good toughness, and resistance to impact loads.
Shipbuilding and marine engineering
Manufacturing and maintenance of hull structures and offshore platforms, especially suitable for welding operations in humid environments, with excellent weld crack resistance.
Agricultural machinery
The manufacture and repair of agricultural machinery such as tractors and harvesters is easy to operate and can quickly complete welding tasks, reducing equipment downtime.
Emergency repair
Suitable for on-site emergency repairs of various equipment, without the need to carry bulky gas cylinders, quickly restore equipment operation and reduce losses.
Welding process guide
Preparation before welding
- Remove impurities such as oil, rust, and moisture from the parent material surface to ensure the welding area is clean
- Check whether the welding wire surface is rusted or contaminated, and dry it at 150-200℃ for 1-2 hours if necessary
- Choose the appropriate groove angle and blunt edge size according to the thickness of the weldment and the joint form
Equipment debugging
Select a DC reverse (DC+) power supply to ensure stable welding machine output
Adjust the appropriate welding current and voltage according to the wire diameter and welding position
Check the wire feeding mechanism to ensure smooth wire feeding and no blockage in the conductive nozzle
Welding operation
Use short arc welding, control the arc length to 3-5mm, and keep the arc stable
Move the wire in a straight line or with a small swing, and the swing width should not exceed 3 times the diameter of the welding wire
When welding multiple layers, control the temperature between layers to ≤150℃, and remove the slag from each layer before welding
Post-weld treatment
Remove slag and spatter from the weld surface and check the weld appearance quality
For important structures or thick plate welds, perform 200-250℃ dehydrogenation treatment
Perform non-destructive testing (such as UT, MT) when necessary to ensure the internal quality of the weld
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