AK-EB2 Submerged Arc Welding Wire for 1.25% Cr-0.5% Mo Heat-Resistant Steel.
A 1.25% Cr-0.5% Mo pearlitic heat-resistant steel submerged arc welding wire designed for use with matching flux to produce weld metal with high strength and toughness in pipeline and structural applications.
Product Overview
AK-EB2 is a 1.25% Cr-0.5% Mo series pearlitic heat-resistant steel submerged arc welding wire. It is formulated for use with corresponding fluxes such as AKJ105 to produce weld metal with excellent mechanical properties.
The wire is intended for welding 1.25% Cr-0.5% Mo pearlitic heat-resistant steels, including T11 steel, in pipeline structures and other high-temperature service applications. It meets EN ISO 24598-A:S S CrMo1, AWS A5.23 F8P0-EB2-B2, and GB/T 12470 S 55 2 FB-SU1CM standards.
Application: With flux (such as AKJ105, etc.), it is used for welding 1.25%Cr-0.5% Mo pearlitic heat resistant steel, such as T11 steel of heat-resistant steel pipeline structure.
Key Benefits
High Strength and Toughness in Heat-Resistant Applications.
The weld metal produced with AK-EB2 and matching flux achieves tensile strength between 550 MPa and 700 MPa, yield stress of at least 470 MPa, and impact energy of at least 27 J at minus 20 degrees C after post-weld heat treatment (PWHT) of 620 degrees C for 1 hour.
Consistent Mechanical Properties After PWHT.
After PWHT at 620 degrees C for 1 hour, the weld metal maintains impact toughness of 690 J at minus 20 degrees C after 5 hours of treatment, ensuring reliable performance in service.
Controlled Chemical Composition
The wire has a carbon content of 0.05-0.15%, chromium of 1.0-1.50%, and molybdenum of 0.40-0.65%, with silicon at 0.80% and manganese at 1.20%, ensuring balanced strength and weldability.
Compatibility with Standard Fluxes.
AK-EB2 is designed to be used with matching fluxes such as AKJ105, ensuring consistent weld quality and compliance with international standards.
Where It Is Used
- Welding of 1.25% Cr-0.5% Mo pearlitic heat-resistant steel pipelines.
- Structural welding in high-temperature service environments.
- Fabrication and repair of T11 steel components in power plant and petrochemical facilities.
- Submerged arc welding of pressure vessel and boiler components requiring heat-resistant weld metal.
Who It Is For
- Welding consumable distributors supplying heat-resistant steel welding solutions.
- Pipeline and oil & gas contractors working with T11 and similar heat-resistant steels.
- Power plant and petrochemical maintenance teams requiring certified filler metal for high-temperature applications.
- Fabricators of heat-resistant steel structures needing consistent, code-compliant weld metal.
Problems It Solves
- Matching filler metal chemistry to 1.25% Cr-0.5% Mo base metals to achieve required mechanical properties after post-weld heat treatment.
- Ensuring weld metal toughness and strength meet code requirements in high-temperature service environments.
- Sourcing a single, certified welding wire compatible with standard fluxes for consistent performance across multiple projects.
Specifications
Published by the factory for AK-EB2. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification 1 | EN ISO 24598-A:S S CrMo1 |
| Classification 2 | AWS A5.23 F8P0-EB2-B2 |
| Classification 3 | GB/T 12470 S 55 2 FB-SU1CM |
| Element | Content |
|---|---|
| C | 0.05-0.15 |
| Si | 0.80 |
| Mn | 1.20 |
| S | ≤0.030 |
| P | ≤0.030 |
| Cr | 1.0-1.50 |
| Mo | 0.40-0.65 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | 550-700 |
| Yield Stress (MPa) | ≥470 |
| Elongation (%) | ≥20J |
| Impact values (J) | ≥27J/-20℃ PWHT(℃*h) -620*1: 690*5 |
Technical Features
- Submerged arc welding wire for 1.25% Cr-0.5% Mo pearlitic heat-resistant steel.
- Chemical composition: C 0.05-0.15%, Si 0.80%, Mn 1.20%, S ≤0.030%, P ≤0.030%, Cr 1.0-1.50%, Mo 0.40-0.65%
- Deposited metal tensile strength: 550-700 MPa.
- Yield stress: at least 470 MPa.
- Elongation: at least 20%
- Impact energy: at least 27 J at minus 20 degrees C after PWHT (620 degrees C for 1 hour)
- Impact energy: 690 J at minus 20 degrees C after PWHT (620 degrees C for 5 hours)
- Complies with EN ISO 24598-A:S S CrMo1, AWS A5.23 F8P0-EB2-B2, and GB/T 12470 S 55 2 FB-SU1CM.
Use Guide
- Select matching flux such as AKJ105 to ensure proper weld metal chemistry and mechanical properties.
- Verify base metal and welding procedure qualification to confirm compatibility with AK-EB2 and the intended service conditions.
- Follow recommended welding parameters for submerged arc welding to maintain consistent bead profile and avoid defects.
- Ensure proper joint preparation and cleaning before welding to prevent contamination and porosity.
- Perform post-weld heat treatment at 620 degrees C for 1 hour to achieve specified impact toughness values.
How It Compares
AK-EB2 is a 1.25% Cr-0.5% Mo submerged arc welding wire designed for heat-resistant steel applications. It differs from general-purpose carbon steel wires by its controlled chromium and molybdenum content, which enables higher strength and improved high-temperature performance. It is not intended for use on low-alloy or non-heat-resistant steels. When compared to other heat-resistant wires, AK-EB2 delivers consistent mechanical properties after PWHT, making it suitable for critical pipeline and structural components.
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AK-EB2 Questions
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