AK-ER65SD NiMo Type Low Alloy Steel Gas Shielded Welding Wire for High Toughness Applications.
A gas shielded welding wire designed for all-position welding of 650 MPa strength steel structures with excellent arc stability, minimal spatter, and high toughness in deposited metal.
Product Overview
AK-ER65SD is a NiMo-type high toughness low alloy steel gas shielded welding wire suitable for all-position welding. It delivers stable arc performance, low spatter, and a smooth, attractive weld bead profile.
The deposited metal achieves a tensile strength of at least 650 MPa and a yield stress of at least 560 MPa, with elongation of at least 15 percent. Impact values meet 47 J at minus 20 degrees C and 100 J at minus 40 degrees C, ensuring reliable performance in low-temperature environments.
AK-ER65SD is supplied to EN ISO, AWS A5.28 ER90S-G, and GB/T 8110 ER65-G standards, and is used in hydropower, construction machinery, lifting machinery, ships, bridges, pipelines, and pressure vessels.
Application: AK-ER65SD is NiMo type high toughness low alloy steel gas shielded welding wire, all position welding process performance is excellent, arc stability, small spatter, beautiful weld shape, deposited metal has good mechanical properties. Suitable for 650MPa steel structure welding, commonly used in hydropower, construction machinery, lifting machinery, ships, bridges, pipelines and pressure vessels and other structures of the welding.
Key Benefits
High Toughness in Deposition.
The deposited metal achieves impact values of at least 47 J at minus 20 degrees C and 100 J at minus 40 degrees C, making it suitable for low-temperature service in critical structures.
Excellent Arc Stability and Low Spatter.
The wire provides a stable arc and minimal spatter during all-position welding, reducing post-weld cleaning and improving weld appearance.
Smooth Weld Bead Profile.
The wire produces a beautiful, uniform weld shape with good fusion and minimal undercut, reducing the need for grinding and rework.
All-Position Welding Capability
Designed for flat, horizontal, vertical, and overhead welding, allowing consistent performance across all joint orientations without changing consumables.
Where It Is Used
- Welding of 650 MPa strength steel structures in hydropower projects.
- Construction and lifting machinery fabrication.
- Shipbuilding and bridge construction.
- Pipeline and pressure vessel assembly.
- Structural welding in high-stress environments requiring high toughness.
Who It Is For
- Welding consumable distributors supplying high-strength low alloy steel welding wires.
- Fabricators working with 650 MPa grade steels in demanding structural applications.
- Contractors in hydropower, shipbuilding, and heavy machinery sectors requiring reliable, consistent welding performance.
Problems It Solves
- Achieving high toughness in deposited metal for low-temperature service without sacrificing weldability or arc stability.
- Reducing spatter and cleaning time in high-productivity welding operations.
- Maintaining consistent weld quality across all positions without changing wire or parameters.
- Meeting mechanical property requirements for 650 MPa strength steel structures with a single, well-characterized wire.
Specifications
Published by the factory for AK-ER65SD. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | EN ISO —— AWS A5.28 ER90S-G GB/T 8110 ER65-G |
| Element | Content |
|---|---|
| C | 0.078 |
| Si | 0.59 |
| Mn | 1.85 |
| S | 0.004 |
| P | 0.012 |
| Ni | 0.78 |
| Cu | 0.09 |
| Mo | 0.27 |
| Al | 0.01 |
| Ti | 0.09 Mechanical |
| Tensile strength (MPa) | ≥650 |
| Yield Stress (MPa) | ≥560 |
| Elongation (%) | ≥15 |
| Impact values (J) | ≥47J/-20℃, 100J/-40℃ |
| Recommended | 1.0mm: F(H)-80-250A/ |
| V(OH)-70-160A 1.2mm | F(H)-100-300A/ |
| V(OH)-80-180A 1.6mm | F(H)-170-390A |
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. The protective gas is rich argon gas with a flow rate of 15-20L/min. 2. The impurities such as water, oil and embroidery must be removed from the welding area. 3. When the current is more than 250A, the wire dry elongation should be 20-25mm
Technical Features
- NiMo-type alloy composition with controlled carbon (0.078%), silicon (0.59%), manganese (1.85%), and molybdenum (0.27%)
- Low sulfur (0.004%) and phosphorus (0.012%) content for improved weld metal cleanliness.
- Tensile strength of at least 650 MPa, yield stress of at least 560 MPa, elongation of at least 15 percent.
- Impact toughness of at least 47 J at minus 20 degrees C and 100 J at minus 40 degrees C.
- Supplied to EN ISO, AWS A5.28 ER90S-G, and GB/T 8110 ER65-G standards.
Use Guide
- Use rich argon protective gas with a flow rate of 15-20 L/min to ensure proper shielding and weld quality.
- Remove all contaminants such as water, oil, and grease from the welding area before starting.
- For currents above 250 A, maintain a wire dry extension of 20-25 mm to ensure stable arc and consistent deposition.
- Follow recommended current ranges for each diameter: 1.0 mm (F(H)-80-250 A / V(OH)-70-160 A), 1.2 mm (F(H)-100-300 A / V(OH)-80-180 A), 1.6 mm (F(H)-170-390 A)
How It Compares
AK-ER65SD is a NiMo-type low alloy steel wire designed for high-strength, high-toughness applications. It differs from standard carbon steel wires like ER70S-6 in its higher strength and impact resistance. Compared to other high-strength wires, AK-ER65SD offers better arc stability and lower spatter in all positions, making it suitable for precision welding in critical structures. It is not intended for use with low-hydrogen requirements or in applications where higher nickel content is needed.
Related Grades
Other welding wire in the same family.
AK-ER65SD Questions
What standards does AK-ER65SD meet?
What are the mechanical properties of the deposited metal?
What are the recommended welding parameters for each diameter?
What protective gas and flow rate should be used?
What packing is AK-ER65SD supplied in?
Can we test AK-ER65SD before placing a production order?
Request a Quotation for AK-ER65SD
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.