AK-ER307Si Austenitic Stainless Steel Welding Wire for Non-Magnetic and Corrosion-Resistant Applications.
A 21% Cr-9% Ni-6% Mn pure austenitic stainless steel wire with low crack sensitivity and stable arc, suitable for all-position welding in demanding environments.
Product Overview
AK-ER307Si is a 21% Cr-9% Ni-6% Mn pure austenitic stainless steel welding wire designed for welding non-magnetic, high-manganese steels and hardening corrosion-resistant steels. The high manganese content reduces crack sensitivity, while silicon improves molten metal fluidity and stabilizes the welding arc.
The wire is suitable for all-position welding and produces a smooth, well-formed weld bead with good appearance. It meets the EN ISO 14343-A:G/W 18 8 Mn and AWS A5.9 ER307Si classifications, making it suitable for critical applications requiring non-magnetic properties and resistance to cracking in dissimilar steel joints.
Application: It is used for welding of non-magnetic, high-manganese steel and hardening corrosion resistant steel. It is often used in nuclear submarines, bulletproof steel plates and other special occasions that require non-magnetic properties. It can also be used for welding of dissimilar steels that are difficult to weld and easy to crack.
Key Benefits
Low Crack Sensitivity
The high manganese content in AK-ER307Si reduces the risk of solidification cracking, making it suitable for welding materials prone to cracking, including dissimilar steels.
Stable Arc and Good Fluidity.
Silicon addition enhances molten metal fluidity and stabilizes the welding arc, resulting in consistent weld deposition and improved bead appearance.
All-Position Welding Capability
The wire performs reliably in flat, horizontal, vertical, and overhead positions, allowing for flexible welding in complex or restricted access areas.
Non-Magnetic and Corrosion-Resistant
The austenitic structure provides non-magnetic properties and good resistance to corrosion, suitable for use in nuclear submarines, bulletproof steel plates, and other high-integrity applications.
Where It Is Used
- Welding of non-magnetic, high-manganese steels.
- Hardening corrosion-resistant steels in critical environments.
- Nuclear submarines and other marine applications requiring non-magnetic materials.
- Bulletproof steel plates and other high-security structural components.
- Dissimilar steel joints that are difficult to weld and prone to cracking.
Who It Is For
- Welding consumable distributors supplying specialty stainless steel wires.
- Fabricators working with high-manganese and corrosion-resistant steels.
- Contractors in nuclear, defense, and marine sectors requiring non-magnetic welds.
- Maintenance teams handling dissimilar steel welds with high crack risk.
Problems It Solves
- Cracking in dissimilar steel joints due to high solidification stress and poor weld metal ductility.
- Difficulty in achieving stable arc and good bead formation when welding high-manganese or hardening steels.
- Need for non-magnetic welds in sensitive applications like nuclear submarines and armor plating.
- Lack of consistent, certified filler metal for critical corrosion-resistant and non-magnetic welding tasks.
Specifications
Published by the factory for AK-ER307Si. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | EN ISO 14343-A:G/W 18 8 Mn AWS A5.9 ER307Si |
| Element | Content |
|---|---|
| C | 0.04-0.14 |
| Si | 0.65-1.00 |
| Mn | 6.5-8.0 |
| S | 0.03 |
| P | 0.03 |
| Ni | 8.0-10.7 |
| Cr | 18.5-22.0 |
| Mo | 0.75 |
| Cu | 0.75 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | 630 |
| Elongation (%) | 32 |
Technical Features
- 21% Cr-9% Ni-6% Mn pure austenitic stainless steel composition.
- Chemical composition: C 0.04-0.14%, Si 0.65-1.00%, Mn 6.5-8.0%, S 0.03%, P 0.03%, Ni 8.0-10.7%, Cr 18.5-22.0%, Mo 0.75%, Cu 0.75%
- Tensile strength of at least 630 MPa.
- Elongation of at least 32%
- Meets EN ISO 14343-A:G/W 18 8 Mn and AWS A5.9 ER307Si classifications.
- Suitable for all-position welding.
Use Guide
- Select wire diameter based on joint thickness and welding position; ensure consistent wire feeding during automated or semi-automated processes.
- Clean base metal surfaces from oil, grease, rust, and scale before welding to prevent contamination and porosity.
- Use shielding gas as specified in the welding procedure—typically argon or argon-rich mixtures for optimal arc stability and weld quality.
- Maintain proper travel speed and heat input to avoid overheating and ensure consistent bead profile and mechanical properties.
How It Compares
AK-ER307Si is a pure austenitic stainless steel wire with high manganese and silicon content, designed for non-magnetic and crack-resistant welds. It differs from standard ER308L in higher manganese and silicon levels, which improve fluidity and reduce solidification cracking. Unlike ER309L, which is used for dissimilar welding between stainless and carbon steel, AK-ER307Si is optimized for high-manganese and hardening corrosion-resistant steels. It is not intended for high-temperature service where higher creep strength is required.
Related Grades
Other welding wire in the same family.
AK-ER307Si Questions
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