AK-H08Mn2NiMoTiB Submerged Arc Welding Wire for X100 Pipeline Steel.
A submerged arc welding wire formulated for X100 pipeline steel and low-alloy high-strength structural steel, delivering a well-shaped weld bead with high strength and crack resistance when used with matching flux.
Product Overview
AK-H08Mn2NiMoTiB is a submerged arc welding wire designed for use with fluxes such as SJ102G to weld X100 pipeline steel and low-alloy high-strength structural steel. The wire is engineered to produce a weld seam with a smooth, attractive appearance and consistent mechanical properties.
The chemical composition includes controlled levels of carbon, manganese, silicon, nickel, molybdenum, titanium, and boron, which together support high tensile strength, good ductility, and resistance to cracking in the weld metal. The wire meets the requirements for mechanical performance in demanding pipeline applications.
Application: With flux (such as SJ102G), it can be used for welding of X100 pipe line steel and low-alloy high-strength structural steel.
Key Benefits
High Tensile Strength and Yield Stress.
The deposited metal achieves a tensile strength of at least 700 MPa and a yield stress of at least 600 MPa, meeting the strength demands of X100 pipeline steel and high-strength structural applications.
Excellent Crack Resistance
The combination of low sulfur (≤0.015%) and phosphorus (≤0.020%) content, along with controlled alloying elements like boron (0.10%) and titanium (0.15%), enhances the weld metal's resistance to cracking during cooling and service.
Good Low-Temperature Toughness
The weld metal maintains impact energy of at least 27 J at minus 40 degrees C, ensuring reliable performance in cold environments typical of pipeline installations.
Consistent Bead Appearance
When used with the recommended flux, the wire produces a smooth, well-shaped weld bead with minimal defects, reducing the need for post-weld grinding or repair.
Where It Is Used
- Welding of X100 pipeline steel in oil and gas transmission systems.
- Joining low-alloy high-strength structural steel in heavy equipment and infrastructure.
- Submerged arc welding in automated and semi-automated production lines.
Who It Is For
- Pipeline contractors requiring consumables for high-strength, low-temperature service.
- Fabricators of heavy structural components using high-strength steels.
- Welding distributors supplying materials for demanding pipeline and structural projects.
Problems It Solves
- Achieving the required mechanical properties in weld metal for X100 pipeline steel without overmatching base metal strength.
- Reducing the risk of cold cracking in high-strength welds through controlled chemistry and low impurity levels.
- Ensuring consistent weld quality and appearance in automated submerged arc welding processes.
Specifications
Published by the factory for AK-H08Mn2NiMoTiB. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | EN ISO —— AWS —— GB/T —— |
| Element | Content |
|---|---|
| C | 0.12 |
| Si | 0.15-0.50 |
| Mn | 1.40-2.0 |
| S | ≤0.015 |
| P | ≤0.020 |
| B | 0.10 |
| Mo | 0.20-0.45 |
| Ti | 0.15 |
| Ni | 0.50-1.20 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | ≥700 |
| Yield Stress (MPa) | ≥600 |
| Elongation (%) | ≥20 |
| Impact values (J) | ≥27J/-40℃ |
Technical Features
- Submerged arc welding wire for X100 pipeline steel and low-alloy high-strength structural steel.
- Chemical composition: C 0.12%, Si 0.15–0.50%, Mn 1.40–2.0%, S ≤0.015%, P ≤0.020%, B 0.10%, Mo 0.20–0.45%, Ti 0.15%, Ni 0.50–1.20%
- Deposited metal tensile strength ≥700 MPa, yield stress ≥600 MPa, elongation ≥20%, impact energy ≥27 J at minus 40 degrees C.
- Compatible with fluxes such as SJ102G for optimal performance.
Use Guide
- Select the wire diameter and flux combination based on joint design and welding position. Use SJ102G as a recommended flux.
- Ensure the wire and flux are stored in dry conditions to prevent moisture absorption, which can lead to porosity or hydrogen-induced cracking.
- Clean the joint surfaces from rust, oil, paint, and moisture before welding to avoid contamination of the weld pool.
- Follow recommended welding parameters for current, voltage, and travel speed to achieve full penetration and consistent bead profile.
How It Compares
AK-H08Mn2NiMoTiB is a high-strength submerged arc wire tailored for X100 pipeline steel. It differs from general-purpose wires like H08Mn2SiA by incorporating nickel, molybdenum, titanium, and boron to improve strength and crack resistance. While H08Mn2SiA is suitable for mild steel, AK-H08Mn2NiMoTiB is designed for high-strength, low-alloy steels where mechanical performance and toughness are critical.
Related Grades
Other welding wire in the same family.
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