AK-EF2 Submerged Arc Welding Wire for High-Strength Low-Temperature Applications.
A high-strength submerged arc welding wire designed for structures requiring excellent low-temperature impact toughness, especially in offshore and heavy industrial environments.
Product Overview
AK-EF2 is a high-strength low-temperature submerged arc welding wire formulated for use with fluxes such as SJ101. When combined with the appropriate flux, it produces deposited metal with excellent low-temperature impact toughness, suitable for demanding structural applications.
The wire meets EN ISO 26304-B:S 62A 2 FB SUN1M3, AWS A5.23 F9A0-EF2, and GB/T 36034 S 62A 2 FB-SUN1M3 standards, ensuring compatibility with international welding specifications and material requirements.
Application: With flux (such as SJ101, etc.), it can be used for welding of structures such as offshore platforms, port machinery, lifting and transportation equipment, ve hicles, and petrochemicals.
Key Benefits
High Tensile Strength and Yield Stress.
The deposited metal achieves a tensile strength of 620-760 MPa and a yield stress of at least 540 MPa, providing robust performance in high-load structural components.
Excellent Low-Temperature Impact Toughness.
Impact values of at least 27 J at minus 40 degrees C ensure reliable performance in cold environments, reducing the risk of brittle fracture.
Controlled Chemical Composition
Precise levels of carbon (0.17%), silicon (0.80%), manganese (1.25-2.25%), and alloying elements such as nickel (0.40-0.80%) and molybdenum (0.40-0.65%) support strength and toughness while maintaining weldability.
Suitable for Critical Structural Applications.
When used with matching fluxes, AK-EF2 is recommended for welding offshore platforms, port machinery, lifting and transportation equipment, vehicles, and petrochemical structures.
Where It Is Used
- Offshore platform construction and maintenance.
- Port and marine equipment fabrication.
- Heavy lifting and transportation machinery.
- Petrochemical plant structures requiring low-temperature toughness.
- High-strength structural components exposed to cold climates.
Who It Is For
- Welding consumable distributors supplying submerged arc welding materials for heavy industry.
- Fabricators of offshore and marine structures requiring certified high-strength weld metal.
- Petrochemical and energy sector contractors specifying low-temperature impact performance.
Problems It Solves
- Achieving required low-temperature impact toughness in structural welds without compromising strength or weldability.
- Matching filler metal chemistry to base metals in high-stress, low-temperature environments.
- Sourcing a single, certified welding wire that meets multiple international standards (EN ISO, AWS, GB/T)
Specifications
Published by the factory for AK-EF2. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification 1 | EN ISO 26304-B:S 62A 2 FB SUN1M3 |
| Classification 2 | AWS A5.23 F9A0-EF2 |
| Classification 3 | GB/T 36034 S 62A 2 FB-SUN1M3 |
| Element | Content |
|---|---|
| C | 0.17 |
| Si | 0.80 |
| Mn | 1.25-2.25 |
| S | ≤0.030 |
| P | ≤0.030 |
| Ni | 0.40-0.80 |
| Mo | 0.40-0.65 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | 620-760 |
| Yield Stress (MPa) | ≥540 |
| Elongation (%) | ≥20J |
| Impact values (J) | ≥27J/-40℃ |
Technical Features
- Chemical composition: C 0.17%, Si 0.80%, Mn 1.25-2.25%, S ≤0.030%, P ≤0.030%, Ni 0.40-0.80%, Mo 0.40-0.65%
- Deposited metal tensile strength: 620-760 MPa.
- Yield stress: at least 540 MPa.
- Elongation: at least 20%
- Impact toughness: at least 27 J at minus 40 degrees C.
- Complies with EN ISO 26304-B:S 62A 2 FB SUN1M3, AWS A5.23 F9A0-EF2, and GB/T 36034 S 62A 2 FB-SUN1M3.
Use Guide
- Select the appropriate flux (e.g., SJ101) to match the wire and ensure the deposited metal meets the required mechanical and toughness properties.
- Ensure the wire and flux are stored in dry conditions to prevent moisture absorption, which can affect weld quality.
- Clean joint surfaces of oil, rust, paint, and moisture before welding to avoid porosity and cracking.
- Follow recommended welding parameters for the specific application and joint configuration to achieve consistent weld quality.
How It Compares
AK-EF2 is a high-strength submerged arc wire with excellent low-temperature impact toughness, suitable for critical structural applications. It differs from standard mild steel wires by its alloy content and performance at low temperatures. Compared to lower-strength wires, it offers higher yield and tensile strength. When compared to other high-strength wires, its specific combination of nickel and molybdenum content supports toughness without requiring post-weld heat treatment in many cases.
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Technical background on this grade from the AKWELD knowledge centre.
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Other welding wire in the same family.
AK-EF2 Questions
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