AK-E91T1-K2 Flux-Cored Wire for High-Strength Steel Welding.
A CO2-shielded flux-cored wire with titanium slag system designed for all-position welding of 620 MPa grade high-strength steel structures with stable arc, low spatter, and excellent slag removal.
Product Overview
AK-E91T1-K2 is a flux-cored welding wire for gas metal arc welding with CO2 shielding. It belongs to the titanium slag system and is formulated for high-strength steel applications requiring good weld metal toughness and process stability.
The wire delivers a stable arc, minimal spatter, and easy slag removal, resulting in a clean, aesthetically pleasing weld bead across all welding positions. It is suitable for use on 620 MPa grade high-strength steel structures in demanding industrial environments.
It meets the EN ISO 17632-A:T 55 4Mn1.5Ni P C1 1, AWS A5.20 E91T1-C1A4-K2, and GB/T 17493 E621T1-K2C classifications, with a chemical composition tailored for strength and toughness in critical joints.
Application: It is suitable for the welding of 620MPa grade high strength steel stru ctures, and is mostly used for the welding of steel structures such as marine engine ering, machinery manufacturing, containers, petrochemicals, bridges, etc.
Key Benefits
Stable Arc and Low Spatter.
The titanium slag system ensures a stable arc and reduced spatter during welding, improving process efficiency and reducing post-weld cleanup.
Easy Slag Removal
The slag formed during welding lifts off easily, minimizing the need for chipping and wire brushing between passes.
Excellent All-Position Welding Performance.
The wire performs consistently in flat, horizontal, vertical, and overhead positions, allowing one consumable to cover full joint access without switching.
Good Weld Metal Plasticity and Toughness.
The deposited metal exhibits high plasticity and low-temperature toughness, meeting the demands of structural applications in harsh environments.
Where It Is Used
- Welding of 620 MPa grade high-strength steel structures.
- Marine engineering and offshore construction.
- Heavy machinery and equipment manufacturing.
- Pressure vessel and container fabrication.
- Petrochemical and pipeline infrastructure.
- Bridge and large steel structure fabrication.
Who It Is For
- Welding consumable distributors supplying high-strength steel welding solutions.
- Fabricators working with 620 MPa grade steels in marine and heavy industrial sectors.
- Contractors involved in structural steel projects requiring all-position capability and clean welds.
Problems It Solves
- Achieving consistent weld quality on 620 MPa grade high-strength steel without excessive spatter or slag retention.
- Maintaining arc stability and weld bead appearance across all welding positions with a single wire.
- Reducing post-weld cleaning time due to stubborn slag or excessive spatter.
Specifications
Published by the factory for AK-E91T1-K2. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification 1 | EN ISO 17632- A:T 55 4Mn1.5Ni P C1 1 |
| Classification 2 | AWS A5.20 E91T1-C1A4-K2 |
| Classification 3 | GB/T 17493 E621T1-K2C |
| Element | Content |
|---|---|
| C | 0.15 |
| Mn | 0.5-1.75 |
| P | 0.03 |
| S | 0.03 |
| Si | 0.80 |
| Ni | 1.0-2.0 |
| Cr | 0.15 |
| Mo | 0.35 |
Mechanical property data for this grade is not published on the factory datasheet. Ask our technical team for the test record before you qualify it.
| Diameter | Current range |
|---|---|
| 1.0mm | :15-20V / 100-250A |
| 1.2mm | :22-32V / 180-300A |
| 1.6mm | :25-38V / 280-400A |
Technical Features
- Flux-cored wire for CO2-shielded gas metal arc welding.
- Titanium slag system with stable arc and low spatter.
- Chemical composition: C 0.15%, Mn 0.5–1.75%, Si 0.80%, Ni 1.0–2.0%, Cr 0.15%, Mo 0.35%, P 0.03%, S 0.03%
- Meets EN ISO 17632-A:T 55 4Mn1.5Ni P C1 1, AWS A5.20 E91T1-C1A4-K2, and GB/T 17493 E621T1-K2C classifications.
- Available in 1.0 mm, 1.2 mm, and 1.6 mm diameters with specified voltage and current ranges.
Use Guide
- Select wire diameter based on joint thickness and access: 1.0 mm for thin sections, 1.2 mm for medium, 1.6 mm for heavy sections.
- Set voltage and current within the recommended ranges: 1.0 mm – 15–20 V / 100–250 A; 1.2 mm – 22–32 V / 180–300 A; 1.6 mm – 25–38 V / 280–400 A.
- Ensure the joint surfaces are clean and free of oil, rust, moisture, and paint before welding.
- Store the wire in sealed packaging and avoid exposure to humidity; re-dry if exposed before use.
How It Compares
AK-E91T1-K2 is a CO2-shielded flux-cored wire with a titanium slag system, offering stable arc and low spatter. It differs from solid wires in its slag-covered weld bead and higher deposition efficiency. Compared to basic flux-cored wires, it provides better process performance and easier slag removal, though it may not achieve the same low hydrogen levels. It is not intended for applications requiring ultra-low hydrogen content.
Related Articles
Technical background on this grade from the AKWELD knowledge centre.
Related Grades
Other welding wire in the same family.
AK-E91T1-K2 Questions
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Which standards does AK-E91T1-K2 meet?
What is the chemical composition of the deposited metal?
Can I get technical data and packaging details before ordering?
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Request a Quotation for AK-E91T1-K2
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