AK-ER80S-B6 Solid Welding Wire for 5%Cr-0.5%Mo Heat-Resistant Steel.
A gas-shielded solid wire designed for high-temperature service applications, delivering stable welding performance and mechanical properties suitable for critical components in elevated-temperature environments.
Product Overview
AK-ER80S-B6 is a solid welding wire for gas metal arc welding (GMAW) of 5%Cr-0.5%Mo chromium-molybdenum heat-resistant steel. It is formulated to provide consistent welding process performance and maintain mechanical integrity at high temperatures.
The wire is intended for use in components exposed to sustained elevated temperatures, such as boiler superheaters, heat exchangers, piping systems, and pressure vessels where long-term creep resistance and thermal stability are required.
Application: It is mainly used for the welding of boiler superheaters, heat exchang-ers, pipes and pressure vessels, etc.
Key Benefits
High-Temperature Mechanical Performance
The chemical composition of AK-ER80S-B6 ensures the deposited metal maintains strength and stability under prolonged exposure to high temperatures, making it suitable for service conditions where creep resistance is critical.
Stable Welding Process
The wire delivers consistent arc stability and smooth metal transfer during GMAW, reducing spatter and supporting high-quality welds with minimal defects.
Compliant Chemistry for 5%Cr-0.5%Mo Steel.
With chromium content between 4.5% and 6.0% and molybdenum between 0.45% and 0.65%, the wire matches the base metal chemistry to ensure compatibility and minimize the risk of cracking in the heat-affected zone.
Preheating Requirement for Sound Welds.
Preheating the workpiece to 177°C-232°C before welding helps reduce hydrogen-induced cracking and ensures proper fusion, especially in thicker sections.
Where It Is Used
- Welding of boiler superheaters in power generation systems.
- Fabrication and repair of heat exchangers in petrochemical and refining plants.
- Joining of high-temperature piping systems.
- Construction and maintenance of pressure vessels operating at elevated temperatures.
Who It Is For
- Pressure vessel and boiler manufacturers requiring reliable filler metal for heat-resistant steels.
- Petrochemical and power plant maintenance teams working on high-temperature components.
- Fabricators of piping systems in oil and gas and industrial process plants.
Problems It Solves
- Mismatch between filler metal chemistry and base metal in 5%Cr-0.5%Mo steel, to poor high-temperature performance or cracking.
- Inconsistent welding performance due to poor arc stability or excessive spatter during GMAW on heat-resistant alloys.
- Lack of pre-weld preparation guidance, resulting in weld defects such as cold lap or hydrogen cracking.
Specifications
Published by the factory for AK-ER80S-B6. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | AWS A5.28 ER80S-B6 |
| Element | Content |
|---|---|
| C | 0.10 |
| Mn | 0.4-0.7 |
| P | 0.025 |
| S | 0.025 |
| Si | 0.50 |
| Cr | 4.5-6.0 |
| Mo | 0.45-0.65 |
| Ni | 0.60 |
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 |
|---|---|
| 0.8mm | F-80-250A / V(OH)-60-160A |
| 1.0mm | F-100-360A / V(OH)-80-220A |
| 1.2mm | F-170-390A |
Note: Before use, the workpiece needs to be preheated to 177°C-232°C
Technical Features
- Solid welding wire for gas metal arc welding (GMAW) with AWS A5.28 ER80S-B6 classification.
- Chemical composition: C 0.10%, Mn 0.4-0.7%, P 0.025%, S 0.025%, Si 0.50%, Cr 4.5-6.0%, Mo 0.45-0.65%, Ni 0.60%
- Recommended preheat temperature: 177°C-232°C.
- Available in 0.8 mm, 1.0 mm, and 1.2 mm diameters with specified current and voltage ranges.
Use Guide
- Select wire diameter based on joint thickness and welding position: 0.8 mm, 1.0 mm, or 1.2 mm.
- Set welding current and voltage within the recommended ranges: 0.8 mm – 80-250 A (flat), 60-160 A (vertical/overhead); 1.0 mm – 100-360 A (flat), 80-220 A (vertical/overhead); 1.2 mm – 170-390 A (flat).
- Preheat the base metal to 177°C-232°C before welding to minimize cracking risk.
- Clean the joint area thoroughly to remove oil, rust, moisture, and other contaminants prior to welding.
- Use shielding gas as specified in the welding procedure specification; typical gases include CO2 or mixtures with argon.
How It Compares
AK-ER80S-B6 is designed specifically for 5%Cr-0.5%Mo heat-resistant steel and is not a substitute for other filler metals such as those for low-alloy or stainless steels.
Related Articles
Technical background on this grade from the AKWELD knowledge centre.
Related Grades
Other welding wire in the same family.
AK-ER80S-B6 Questions
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What is the required preheat temperature?
What is the chemical composition of the wire?
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Can we test AK-ER80S-B6 before placing a production order?
Request a Quotation for AK-ER80S-B6
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