During high-frequency (HF) welded tube production, a continuous weld bead — commonly referred to as weld burr — forms on both the inner and outer surfaces of the tube at the weld seam. To meet strict dimensional tolerances, surface quality standards, and downstream processing requirements, internal scarfing tools and external scarfing tools are used to remove these weld beads online, ensuring the weld zone complies with specified technical standards.
At Moresuperhard, we manufacture a comprehensive range of scarfing tools for tube mill production lines worldwide. Our products are widely used in the manufacture of carbon steel tubes, stainless steel tubes, and alloy steel tubes, delivering efficient and stable weld bead removal that enhances both product quality and production efficiency.
Weld bead scarfing tools — also known as burr cutters, scarfing blades, or weld bead removers — are specialized cutting tools installed on HF tube welding lines. They perform online removal of the internal and external weld beads formed during the welding process, producing a smooth, clean weld seam surface.
At Moresuperhard, our scarfing tools are engineered to deliver:
● Consistent weld bead removal across a wide range of tube sizes and materials
● Extended tool life through advanced carbide grades and coating technologies
● Minimal downtime with quick-change blade designs
● Customized solutions tailored to specific tube mill configurations
After HF welding is completed, the weld seam area forms both internal weld bead (inside the tube) and external weld bead (outside the tube). These beads must be removed to ensure proper tube dimensions and surface quality.
Two types of scarfing tools are employed:
● Internal scarfing tools (inside burr cutters): Mounted inside the tube to shave off the inner weld bead
● External scarfing tools (outside burr cutters): Positioned outside the tube to remove the outer weld bead
Moresuperhard offers a complete product system covering both internal and external scarfing tools, with a full range of specifications that can be customized to suit different tube diameters, wall thicknesses, and production process requirements.
The scarfing operation takes place immediately after welding, when the weld bead temperature typically exceeds 1,000°C. This extreme operating environment places severe demands on the cutting tool:
● Extreme heat resistance: Tools must maintain hardness and cutting performance at temperatures above 1,000°C, requiring excellent hot hardness (red hardness) and thermal stability
● Impact and wear resistance: The cutting edge is subjected to high-impact loads at elevated temperatures, making the tool susceptible to chipping, which can cause weld seam scratches and surface defects
These demanding conditions mean that tool material selection and edge preparation are critical to achieving stable, high-quality scarfing results.
Manufactured from premium cemented carbide or high-performance tool steel, our scarfing tools deliver outstanding wear resistance for long service life, even under continuous high-temperature operation.
Optimized blade edge geometry ensures rapid and thorough removal of both internal and external weld beads, minimizing residual burr and reducing the need for secondary processing.
Strict manufacturing tolerances ensure consistent weld seam dimensions and surface quality across every production run.
Engineered to withstand the high temperatures and impact loads generated during high-speed tube production, our tools maintain stable cutting performance throughout continuous operation.
Available in various specifications and structural configurations to suit different tube diameters, wall thicknesses, and production process requirements. Custom designs are available for non-standard applications.
Rational structural design enables fast installation and blade replacement, significantly reducing downtime and improving overall production efficiency.
After scarfing, the weld seam is smooth and even, contributing to improved tube appearance and better performance in downstream processing operations.
We provide personalized tooling solutions based on customer equipment models, tube specifications, and specific process requirements.
One of the most critical challenges in weld bead scarfing is edge chipping under high-temperature, high-impact conditions. At Moresuperhard, we have developed a proprietary edge strengthening process that significantly improves the tool's resistance to chipping and edge breakage.
This technology enables our scarfing tools to meet the demands of various weld bead removal processes — from sharp-edge to dull-edge applications — delivering stable and efficient performance across a wide range of operating conditions.
Moresuperhard offers two primary carbide grades specifically developed for weld bead scarfing applications, each optimized for different operating conditions.
MY46 is a carbide grade with excellent high-temperature performance and high toughness, specifically developed for weld bead removal applications.
● Superior high-temperature deformation resistance — maintains dimensional stability at extreme operating temperatures
● Excellent impact resistance — withstands the dynamic loads of high-speed scarfing
● Ideal for small to medium tube diameter scarfing applications
When paired with a CVD coating, MY46 delivers further improvements in machining stability and tool life.
MY75 offers higher toughness (comparable to ISO P25–P40 grades) and, when combined with our proprietary aluminum oxide (Al₂O₃) CVD coating, achieves outstanding hot hardness and wear resistance.
● High toughness and reliability — suitable for demanding large-diameter tube applications
● Excellent high-temperature wear resistance — extended tool life in continuous production
● Ideal for medium to large tube diameter scarfing applications
Beyond MY46 and MY75, Moresuperhard can also provide a variety of custom carbide substrate and coating combinations to meet specific material, specification, and operating condition requirements.
Moresuperhard continuously invests in research and development to deliver the most advanced scarfing tool solutions. Our latest generation of scarfing tools incorporates the following innovations:
● New-generation carbide substrate: Developed in-house, offering significantly improved hot hardness and comprehensive mechanical properties
● Advanced Al₂O₃ CVD coating technology: Substantially increases tool wear resistance and service life
● Proprietary 3R mold and pressing process: Enhances production efficiency while effectively reducing manufacturing costs
● Broad versatility: Suitable for internal and external scarfing across a wide range of tube materials and specifications
At Moresuperhard, we combine decades of carbide tool manufacturing expertise with a deep understanding of tube mill production requirements. Our scarfing tool solutions offer:
● Proprietary carbide grades specifically engineered for high-temperature weld bead removal
● Advanced CVD coating technology developed in-house for maximum tool performance
● Full customization capabilities — from carbide grade and coating to blade geometry and mounting design
● Complete product range covering both internal and external scarfing tools for all tube sizes
● Technical support from experienced application engineers to optimize your scarfing process
Whether you produce carbon steel tubes, stainless steel tubes, or alloy steel tubes, Moresuperhard has the right scarfing tool solution for your tube mill production line.
A weld bead scarfing tool is a cutting blade used in tube mill production lines to remove the internal and external weld bead (weld burr) formed during high-frequency welding, ensuring the weld seam meets dimensional and surface quality requirements.
Scarfing tools are typically made from high-performance cemented carbide with specialized coatings such as CVD aluminum oxide coating, selected for their high-temperature hardness, wear resistance, and impact toughness.
The weld bead scarfing process takes place immediately after welding, when the weld seam temperature typically exceeds 1,000°C, requiring tools with excellent hot hardness and thermal stability.
Yes. Scarfing tools can be customized for different tube diameters, wall thicknesses, and production process requirements, including both internal and external scarfing blade configurations.
MY46 is optimized for small to medium tube scarfing with excellent high-temperature performance and impact resistance. MY75 offers higher toughness (ISO P25–P40 range) and is better suited for medium to large tube applications, especially when combined with aluminum oxide CVD coating.
Moresuperhard employs a proprietary edge strengthening process that significantly improves chipping resistance, enabling stable performance in both sharp-edge and dull-edge scarfing applications under extreme temperature and impact conditions.
Looking to improve weld seam quality and reduce tooling costs on your tube production line? Contact Moresuperhard today to discuss your specific requirements and get a customized scarfing tool solution.
