AK-S60SD and AK-AF217SD for High-Strength Low Alloy Steel Welding.
A submerged arc welding wire and flux combination designed for 600MPa high-strength steel structures, delivering stable arc, easy slag removal, and excellent low-temperature toughness in hydropower, shipbuilding, and heavy industry applications.
Product Overview
AK-S60SD is a submerged arc welding wire for low alloy high strength steel, and AK-AF217SD is a fluorine-based, high-basicity sintered flux. The combination is used in submerged arc welding for high-strength steel structures.
The flux is supplied in 10 to 60 mesh size. The system provides a stable arc, easy slag removal, and deposited metal with good low-temperature impact toughness and crack resistance.
This wire-flux pair is suitable for welding 600MPa high-strength steel in the hydropower industry and is commonly used in low alloy welding for ships, machinery, chemical plants, bridges, and steel structures.
Application: AK-S60SD is a submerged arc welding wire for low alloy high strength steel, AK-AF217SD is a fluorine base type high basicity sintered flux. The combination of AK-S60SD and AK- AF217SD, the size of flux is 10 ~ 60 mesh, the welding technology is good, the arc is stable, the slag is easy to be removed, the deposited metal has good low temperature impact toughness and crack resistance. It is suitable for the welding of 600MPa high strength steel structure in hydropower industry. It is often used in the low alloy welding of ship, machinery, chemical industry, bridge, steel structure and so on.
Key Benefits
Stable Arc and Easy Slag Removal.
The AK-AF217SD flux ensures a stable arc during welding and produces slag that lifts off easily, reducing inter-pass cleaning time and minimizing the risk of slag entrapment.
Excellent Low-Temperature Toughness
Deposited metal achieves impact values of at least 27 J at minus 20 degrees C and 95 J at minus 40 degrees C, meeting the toughness requirements for low-temperature service environments.
High Strength and Crack Resistance.
The combination delivers tensile strength between 620 MPa and 760 MPa, yield stress of at least 540 MPa, and elongation of at least 17 percent, with good resistance to cracking in high-strength applications.
Suitable for Critical Structural Applications.
Designed for use in hydropower, shipbuilding, and heavy industrial structures where high strength and reliable weld integrity are required.
Where It Is Used
- Welding of 600MPa high-strength steel structures in hydropower projects.
- Low alloy steel welding in shipbuilding and marine construction.
- Heavy machinery and chemical plant components.
- Bridge and large steel structure fabrication.
Who It Is For
- Welding consumable distributors supplying high-strength steel welding solutions.
- Fabricators working with 600MPa grade steels in hydropower and heavy industry.
- EPC contractors requiring consistent, certified consumables for critical welds.
Problems It Solves
- Achieving required low-temperature impact toughness and crack resistance in high-strength steel welds without compromising strength.
- Managing slag removal and arc stability in high-deposition-rate submerged arc welding processes.
- Ensuring consistent weld quality across multiple passes and joints in large structural components.
Specifications
Published by the factory for AK-S60SD/ AK-AF217SD. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | EN ISO —— AWS A5.23M F62A2/A4-EG-G GB/T 36037 SA FB 1 |
| Element | Content |
|---|---|
| C | 0.070 |
| Si | 0.050 |
| Mn | 1.87 |
| S | 0.005 |
| P | 0.012 |
| Ni | 1.00 |
| Mo | 0.26 Mechanical |
| Tensile strength (MPa) | 620-760 |
| Yield Stress (MPa) | ≥540 |
| Elongation (%) | ≥17 |
| Impact values (J) | ≥27J/-20℃, 95J/-40℃ |
| Recommended | —— |
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.
Note: 1, before the use of flux must be 300 ~ 350 ° C baking 1-2 hours, welding wire should be dry before use, no oil, Rust State 2, welding should be strictly removed before the welding area of oil, rust, moisture and other impurities, 3. When welding, preheat 150 ~ 300 ° C (depending on plate thickness and material) . 4. Recommended welding specification (taking Φ4.0 wire as an example) I = 500 ~ 550A, U = 28 ~ 32V, welding speed V = 50 ~55cm/min, inter-pass temperature 150 ~ 180 ° C. 5. To ensure the plasticity of deposited metal, it is necessary to dehydrogen at 200 ~ 240 °C for 2 ~ 4 hours after welding. Flux Quality Requirements: 1. Flux water content ≤0.10% 2. Mechanical inclusions ≤0.30. 3. in flux, flux s 0.050% 4. Flux p content ≤0.060% Deposited metal x-ray detection requirements : Grade I
Technical Features
- AK-S60SD wire and AK-AF217SD flux combination for submerged arc welding.
- Flux particle size: 10 to 60 mesh.
- Deposited metal tensile strength: 620–760 MPa.
- Yield stress: at least 540 MPa.
- Elongation: at least 17 percent.
- Impact toughness: at least 27 J at minus 20 degrees C, 95 J at minus 40 degrees C.
- Flux water content: no more than 0.10 percent.
- Mechanical inclusions in flux: no more than 0.30 percent.
- Flux sulfur content: no more than 0.050 percent.
- Flux phosphorus content: no more than 0.060 percent.
- Deposited metal x-ray detection: Grade I.
Use Guide
- Pre-bake the AK-AF217SD flux at 300 to 350 degrees C for 1 to 2 hours before use.
- Ensure the AK-S60SD welding wire is dry and free of oil, rust, or moisture before welding.
- Clean the welding area thoroughly to remove oil, rust, and moisture prior to welding.
- Preheat the base metal to 150 to 300 degrees C, depending on plate thickness and material.
- For a 4.0 mm wire, recommended parameters are current 500 to 550 A, voltage 28 to 32 V, welding speed 50 to 55 cm/min, and inter-pass temperature 150 to 180 degrees C.
- After welding, dehydrogenate the weld at 200 to 240 degrees C for 2 to 4 hours to ensure deposited metal plasticity.
How It Compares
AK-S60SD and AK-AF217SD are a wire-flux pair for submerged arc welding of high-strength low alloy steel. They differ from standard carbon steel combinations by offering higher strength, improved toughness at low temperatures, and better crack resistance. Compared to basic fluxes, this sintered flux provides a more stable arc and easier slag removal. For applications requiring lower hydrogen content, a different flux type may be needed, but this combination is optimized for high-strength structural welding.
Related Grades
Other welding wire in the same family.
AK-S60SD/ AK-AF217SD Questions
What is the recommended preheat temperature?
What are the recommended welding parameters for a 4.0 mm wire?
What is the flux particle size and baking requirement?
What are the mechanical properties of the deposited metal?
What packing is AK-S60SD/ AK-AF217SD supplied in?
Can we test AK-S60SD/ AK-AF217SD before placing a production order?
Request a Quotation for AK-S60SD/ AK-AF217SD
Send the diameter, the quantity and the destination port. Our technical team replies with packing, pricing and the data you need to qualify the grade.