AK-H09CrCuSb Weathering Steel Welding Wire for High-Sulfur Flue Gas Environments.
A solid wire designed for welding weathering steel components exposed to corrosive, high-sulfur flue gas in power plants and refineries.
Product Overview
AK-H09CrCuSb is a solid welding wire classified under GB/T 8110 ER50-G, also known as ND steel, formulated for use in weathering steel applications.
It is specifically intended for fabricating components such as economizers, air preheaters, heat exchangers, and evaporators that operate in high-sulfur flue gas environments where resistance to condensation and sulfur-containing corrosion is required.
Application: It is widely used in power plants and refineries to manufacture econo mizers, air prehe -aters, heat exchangers and evaporators that work in high-sulfur flue gas to resist condensation and corrosion of sulfur- containing flue gas.
Key Benefits
Corrosion Resistance in High-Sulfur Environments.
The wire's chemical composition, including chromium and copper, provides enhanced resistance to corrosion from sulfur-containing flue gases, extending service life in aggressive conditions.
Controlled Sulfur and Phosphorus Levels.
With sulfur limited to 0.010% and phosphorus to 0.015%, the wire minimizes the risk of hot cracking and maintains good weld metal integrity during deposition.
Balanced Mechanical Properties
The deposited metal achieves a tensile strength of 390–550 MPa, yield stress of at least 245 MPa, and elongation of at least 25%, supporting structural performance in demanding applications.
Stable Alloying Elements for Weathering Performance.
The addition of copper (0.25–0.45%) and antimony (0.04–0.1%) enhances the formation of a protective oxide layer, improving long-term weathering resistance.
Where It Is Used
- Economizers in power plants and refineries.
- Air preheaters exposed to high-sulfur flue gas.
- Heat exchangers and evaporators operating in corrosive environments.
- Structural components made from weathering steel in industrial facilities.
Who It Is For
- Welding consumable distributors supplying materials for industrial boiler and heat exchanger fabrication.
- Power plant and refinery maintenance teams working on flue gas system components.
- Fabricators of equipment exposed to sulfur-rich combustion byproducts.
Problems It Solves
- Matching filler metal chemistry to weathering steel (ND steel) to ensure weld metal resists corrosion from high-sulfur flue gas.
- Avoiding weld metal degradation due to high sulfur or phosphorus content in the filler metal.
- Achieving consistent mechanical properties in the weld zone when joining weathering steel components.
Specifications
Published by the factory for AK-H09CrCuSb. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | GB/T 8110 ER50-G |
| Element | Content |
|---|---|
| C | 0.12 |
| Si | 0.20-0.40 |
| Mn | 0.35-0.65 |
| S | 0.010 |
| P | 0.015 |
| Cu | 0.25-0.45 |
| Cr | 0.75-1.01 |
| Sb | 0.04-0.1 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | 390-550 |
| Yield Stress (MPa) | ≥245 |
| Elongation (%) | ≥25 |
| Impact values (J) | —— |
Technical Features
- Solid welding wire supplied to GB/T 8110 ER50-G standard.
- Chemical composition includes C: 0.12%, Si: 0.20–0.40%, Mn: 0.35–0.65%, S: 0.010%, P: 0.015%, Cu: 0.25–0.45%, Cr: 0.75–1.01%, Sb: 0.04–0.1%
- Deposited metal tensile strength: 390–550 MPa.
- Yield stress: at least 245 MPa.
- Elongation: at least 25%
- Impact values not specified in available data.
Use Guide
- Select wire diameter based on joint thickness and welding position; recommended parameters are available upon request.
- Clean base metal surfaces of oil, rust, paint, and moisture before welding to ensure sound fusion and avoid contamination.
- Use shielding gas as specified in the welding procedure; typical gases include CO2 or mixtures with argon for optimal arc stability and bead appearance.
- Store wire in dry conditions to prevent moisture absorption; re-bake if exposed to humid environments before use.
How It Compares
It is not intended for use in low-alloy or high-strength structural steels without proper qualification. Unlike basic-coated electrodes, this solid wire is used in semi-automatic or automatic welding processes and requires a shielding gas.
Related Grades
Other welding wire in the same family.
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