AK-EB2R Submerged Arc Welding Wire for 1.25% Cr-0.5% Mo Heat-Resistant Steel.
A pearlitic heat-resistant steel wire for submerged arc welding, designed to deliver strong, ductile weld metal when used with compatible fluxes in high-temperature service applications.
Product Overview
AK-EB2R is a 1.25% Cr-0.5% Mo series pearlitic heat-resistant steel submerged arc welding wire. It is formulated for use with matching fluxes such as AKJ105 to produce weld metal with mechanical properties suitable for service in elevated temperature environments.
The wire is intended for welding 1.25% Cr-0.5% Mo pearlitic heat-resistant steels, including T11 steel used in pipeline and structural applications where creep strength and thermal stability are required.
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 Ductility in Weld Metal.
The wire delivers tensile strength between 515 MPa and 690 MPa, with yield stress at least 430 MPa and elongation of at least 19 percent, ensuring resistance to deformation and fracture under load.
Good Impact Toughness at Low Temperature.
Weld metal achieves impact values of at least 54 J at minus 30 degrees C, with enhanced toughness after post-weld heat treatment (PWHT) at 620 degrees C for 1 hour or 690 degrees C for 2 hours.
Controlled Chemical Composition
The composition includes carbon 0.05-0.15%, chromium 1.0-1.75%, and molybdenum 0.40-0.65%, which supports the formation of a stable pearlitic microstructure and long-term performance in heat-resistant service.
Compatibility with Matching Fluxes.
When used with compatible fluxes such as AKJ105, the wire ensures consistent weld metal chemistry and mechanical properties, reducing the risk of undermatching or overmatching in the weld zone.
Where It Is Used
- Welding of 1.25% Cr-0.5% Mo pearlitic heat-resistant steel pipelines.
- Structural components in power plant and petrochemical facilities exposed to elevated temperatures.
- Repair and fabrication of T11 steel pressure vessels and boiler tubes.
- Submerged arc welding in industrial and heavy engineering environments.
Who It Is For
- Welding consumable distributors supplying heat-resistant steel welding solutions.
- Fabricators and EPC contractors working with T11 and similar heat-resistant steels.
- Maintenance teams performing repairs on high-temperature piping and pressure equipment.
Problems It Solves
- Achieving weld metal strength and toughness that meet code requirements for heat-resistant steel joints without overmatching base metal properties.
- Ensuring consistent mechanical performance across multiple weld passes and joints by using a wire with a defined chemical composition and matching flux system.
- Reducing the risk of weld failure in high-temperature service due to inadequate impact toughness or low ductility in the weld zone.
Specifications
Published by the factory for AK-EB2R. 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-EB2R-B2 |
| Classification 3 | GB/T 12470 S 55 2 FB-SU1CM |
| Element | Content |
|---|---|
| C | 0.05-0.15 |
| Si | 0.30 |
| Mn | 0.45-1.0 |
| S | ≤0.030 |
| P | ≤0.030 |
| Cr | 1.0-1.75 |
| Mo | 0.40-0.65 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | 515-690 |
| Yield Stress (MPa) | ≥430 |
| Elongation (%) | ≥19J |
| Impact values (J) | ≥54J/-30℃ PWHT(℃*h) -620*1: 690*2 |
Technical Features
- Submerged arc welding wire for 1.25% Cr-0.5% Mo pearlitic heat-resistant steel.
- Complies with EN ISO 24598-A:S S CrMo1, AWS A5.23 F8P0-EB2R-B2, and GB/T 12470 S 55 2 FB-SU1CM standards.
- Carbon content: 0.05-0.15%
- Chromium: 1.0-1.75%, Molybdenum: 0.40-0.65%
- Tensile strength: 515-690 MPa, Yield stress: ≥430 MPa.
- Elongation: ≥19 percent, Impact toughness: ≥54 J at minus 30 degrees C.
- Impact toughness after PWHT: 690 J at 690 degrees C for 2 hours.
Use Guide
- Select the wire diameter and flux combination based on joint design and welding position. Use AKJ105 or equivalent flux for optimal results.
- Ensure the base metal and wire are clean of oil, rust, moisture, and scale before welding to prevent porosity and cracking.
- Maintain recommended welding parameters for consistent bead profile and penetration. Use proper shielding gas or flux coverage to protect the weld pool.
- Perform post-weld heat treatment (PWHT) at 620 degrees C for 1 hour or 690 degrees C for 2 hours as required by the application to achieve target impact toughness.
How It Compares
AK-EB2R is a 1.25% Cr-0.5% Mo submerged arc welding wire intended for heat-resistant steel applications. It differs from low-alloy wires like those in the 0.5% Cr series by offering higher strength and improved creep resistance. Compared to higher-chromium alloys, it has lower alloy content and is suited for service temperatures below 550 degrees C. When used with the correct flux, it provides a balanced combination of strength, ductility, and toughness in the weld metal.
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Other welding wire in the same family.
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