Explore precision seamless tubes, custom profiles, international material grades, steel standards and rebar coupling solutions.
09CrCuSb steel pipe, also known as ND steel Tube or Corten Steel Pipe, is a specialized corrosion-resistant seamless tube specifically designed for harsh environments. It excels in applications where resistance to sulfuric acid dew point corrosion, marine salt spray, and weak acid/alkali conditions is required.
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11SMn30 Free-Cutting Steel Seamless Tubes represent a specialized category of high-sulfur phosphorus composite free-cutting steel tubes engineered specifically for high-efficiency machining applications. Unlike conventional structural steels, these free-cutting steel tubes feature a unique chemical composition with controlled carbon content ≤0.14%, manganese
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Seamless Tubes represent a premium-grade, high-sulfur phosphorus lead-free free-cutting steel tubing engineered specifically for automated, high-speed precision machining applications. Unlike conventional structural steels, these American ASTM standard 1215 seamless tubes feature an ultra-low carbon content (≤0.09%), optimized manganese (0.75%-1.05%), and el
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Annealing represents a crucial delivery condition for precision steel tubes, commercially designated as GBK（+A） condition. Annealed Steel Tubes in GBK condition constitute a specialized category of precision steel pipes that have undergone complete annealing treatment after cold forming processes. These stress-relieved seamless tubes are manufactured accordi
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The Bolted Rebar Coupler System is a mechanical rebar splicing solution designed to replace traditional methods like welding or lap splicing. Its core function is to create a seamless, end-to-end connection between two reinforcing bars using a high-strength steel sleeve with internal threads and locking bolts. The primary value it offers is significant time
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Cold-Drawn Seamless Steel Pipes, also known as precision-drawn tubes or cold-finished seamless pipes, represent our high-precision product line manufactured through advanced cold-drawing technology. These precision cold-drawn tubes are produced by drawing seamless steel billets through precision dies at room temperature, resulting in superior dimensional acc
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Cold Finished and Stress-Relieved Steel Pipes (BKS/+SR Condition) represent a precision delivery state where steel tubes undergo specialized stress relief annealing after cold forming processes. These stress-relieved seamless tubes effectively eliminate residual internal stresses from cold working while preserving the high dimensional accuracy and partial st
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Cold Finished (hard) Steel Pipes (BK/+C) represent a delivery state where steel tubes undergo cold forming processes without subsequent heat treatment. These hard-condition seamless tubes maintain their as-cold-worked properties, featuring high strength and precise dimensional characteristics that make them suitable for applications requiring rigid component
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Cold Finished(Soft) Steel Pipes (BKW/+LC n) represent a specialized delivery state where steel tubes undergo cold forming followed by low-temperature stress relief annealing. These soft-condition seamless tubes balance the high precision of cold working with the improved plasticity from stress relief treatment, positioning them between hard condition (BK) an
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Cold-Rolled Steel Tubes, also known as fine-rolled seamless tubes, are manufactured through an advanced process where steel shells are precisely rolled over mandrels using controlled roller systems. This sophisticated rolling technology applies calculated radial pressure while maintaining steady axial movement, producing tubes with exceptional dimensional co
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◆ Tailored Solutions for Your Needs Tenjan deeply analyzes your application scenarios, leveraging mature steel tube production techniques and 30+ years of expertise. ◆ Any Shape, Any Size – Ready to Use We specialize in manufacturing uniquely shaped and special-sized section steel—eliminating costly secondary processing of standard profiles. Save time and re
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◆ Tailored Solutions for Your Needs Tenjan deeply analyzes your application scenarios, leveraging mature steel tube production techniques and 30+ years of expertise. ◆ Any Shape, Any Size – Ready to Use We specialize in manufacturing uniquely shaped and special-sized section steel—eliminating costly secondary processing of standard profiles. Save time and re
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Tenjan delivers fully customizable cold-drawn welded tubes in both standard round and specialized profiles. Our engineered solutions adapt to your exact application requirements. We tailor: ✓ Material properties - Carbon steel, alloy grades & mechanical performance ✓ Dimensional precision - Tight tolerances to ±0.05mm ✓ Profile geometry - From simple rounds
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Tenjan delivers fully customizable Cold-Rolled welded tubes in both standard round and specialized profiles. Our engineered solutions adapt to your exact application requirements. Application-Optimized Solutions We tailor: ✓ Material properties - Carbon steel, alloy grades & mechanical performance ✓ Dimensional precision - Tight tolerances to ±0.05mm ✓ Profi
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DIN 17175 seamless steel tubes represent the German standard for heat-resistant seamless steel tubes designed specifically for elevated temperature service conditions. These precision-engineered tubes are manufactured to withstand demanding high-temperature environments while maintaining structural integrity and performance reliability. As specialists in col
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Our Double Finned Tubes represent high-efficiency Cold-Drawn Hollow Special Steel Pipes engineered for superior thermal performance in demanding applications. Our double fin boiler tubes comply with standards such as EN 10216-2, ASME SA-210, and ASME SA-106，ASME SA-192 and ASME SA-179. Customizable materials include ASTM SA210A-1, ASTM SA210C, and molybdenum
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At Tenjan, we transform the European standard EN 10297-1 into tailored seamless steel tube solutions that precisely match your mechanical application requirements. With over 21 years of specialized experience and a dedicated R&D team boasting 30 years of technical expertise, we go beyond standard specifications to deliver custom-engineered tubes that optimiz
View product →At Tenjan, we specialize in manufacturing EN 10305-1 precision steel tubes that meet the rigorous European standard for cold-drawn seamless tubing. Our precision-engineered tubes are manufactured through advanced cold-drawing processes to deliver exceptional dimensional accuracy, superior surface quality, and consistent mechanical properties. Designed for ap
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As a specialized seamless steel tube manufacturer with over two decades of expertise, Tenjan produces GB/T 3087 seamless steel tubes that meet China's national standard for low and medium pressure boiler applications while ensuring full compatibility with international specifications.
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As a specialized seamless steel tube manufacturer with 21 years of industry expertise, Tenjan produces GB/T 3094 cold-drawn special-shaped steel tubes that represent the pinnacle of custom profile manufacturing. Our precision-shaped steel tubes are engineered through advanced cold-drawing technology to deliver exceptional dimensional accuracy, superior surface quality, and optimized mechanical properties for specialized structural applications. With our experienced 30-year R&D team, we provide global clients with custom cross-section solutions that combine innovative engineering with cost-effective manufacturing.
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As an established seamless steel tube manufacturer with 21 years of specialized experience, Tenjan produces GB/T 3639 precision seamless steel tubes that represent the pinnacle of cold-drawn and cold-rolled manufacturing technology. Our precision cold-finished tubes are engineered for applications demanding exceptional dimensional accuracy, superior surface quality, and consistent mechanical properties, serving global clients in hydraulic systems, precision machinery, and automotive manufacturing with cost-effective solutions that rival international standards in quality and performance.
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As a leading seamless steel tube manufacturer with over two decades of expertise, Tenjan produces GB/T 8162 seamless steel tubes that meet China's national standard for structural applications while maintaining full compatibility with major international specifications. Our structural seamless tubes are engineered to deliver reliable performance in construction frameworks, mechanical components, and industrial structures, offering global clients a cost-effective alternative without compromising quality or technical requirements.
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As a specialized seamless steel tube manufacturer with 21 years of technical expertise, Tenjan produces GB/T 8163 seamless steel tubes that meet China's national standard for fluid conveyance applications while maintaining full compatibility with international specifications. Our fluid conveyance seamless tubes are engineered for reliable performance in transporting water, oil, gas, and steam under medium to low-pressure conditions, offering global clients a cost-effective solution without compromising quality or safety requirements.
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As a specialized seamless steel tube manufacturer with 21 years of industry expertise, Tenjan produces GOST 8733 seamless steel tubes that meet the Russian national standard for cold-deformed seamless steel tubes while maintaining compatibility with international specifications. Our precision cold-drawn tubes are engineered to deliver reliable performance fo
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Our Hexagonal Steel Pipes, also known as Hexagonal Tubes or Hex Pipes, are high-precision Seamless Steel Tubes with a regular hexagonal cross-section. Manufactured from high-grade Carbon Steel and Alloy Steel through a specialized Cold-Drawing process, these Precision Hexagonal Bars offer exceptional dimensional accuracy, superior strength, and excellent sur
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At Tenjan, we specialize in manufacturing JIS G3441 alloy steel seamless tubes that meet the rigorous Japanese Industrial Standards for mechanical structural applications. Our cold-drawn precision alloy tubes are engineered to deliver exceptional strength, durability, and dimensional accuracy for demanding sectors such as automotive engineering, heavy machin
View product →JIS G3445 seamless steel tubes represent the Japanese Industrial Standard for carbon steel tubes specifically designed for machine structural purposes. These cold-drawn precision tubes are engineered to deliver exceptional dimensional accuracy, superior surface quality, and reliable mechanical properties for demanding structural applications. As a leading ma
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At Tenjan, we specialize in manufacturing JIS G3461 seamless steel tubes that set the benchmark for boiler and heat exchanger applications. Our cold-drawn precision tubes are engineered to deliver exceptional performance in high-temperature and high-pressure environments, ensuring reliable heat transfer efficiency and long-term operational safety. Through ou
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Normalized Steel Pipes (NBK/+N Condition) represent a standardized delivery state where steel tubes undergo normalizing heat treatment after cold forming processes. These normalized seamless tubes are heated to 30-50°C above Ac3 (for hypoeutectoid steel) or Accm (for hypereutectoid steel) temperatures, maintained at this level, then cooled in air to achieve
View product →Octagonal Steel Pipes represent our advanced line of eight-sided seamless tubes featuring precision regular octagonal cross-sections. These multi-faceted profile pipes are manufactured through sophisticated cold-drawing technology that transforms round steel billets into geometrically optimized octagonal configurations, maintaining the inherent strength of s
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Oval Steel Pipes and Elliptical Steel Tubes represent our specialized line of seamless oval-shaped sections engineered for applications requiring space-optimized profiles and enhanced structural performance. These cold-formed oval pipes are manufactured through precision cold-drawing processes that transform conventional round seamless tubes into aerodynamic
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Tenjan Precision Seamless Steel Tubes are cold-formed tubular products manufactured for applications requiring better dimensional consistency and surface quality than standard seamless tubes. These tubes are particularly suited for automotive components, hydraulic systems, and mechanical parts where reliable performance and ease of further processing are ess
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Q355B Low-Alloy High-Strength Seamless Steel Tubes represent Chinese GB standard low-alloy high-strength structural steel tubes engineered for general industrial applications requiring optimal balance between strength, toughness, and cost-effectiveness. These low-alloy structural tubes feature controlled carbon content ≤0.21% with manganese levels of 1.00%-1
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Quenched and Tempered Steel Pipes (Q&T ) represent advanced heat-treated steel tubes that undergo precise "quenching + high-temperature tempering" processes. These special heat-treated tubes are engineered to achieve optimal balance between strength and toughness through the formation of tempered sorbite microstructure, making them ideal for heavy-load and h
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◆ Tenjan's Rebar Couplers feature national-standard quality, compliant with JG/T163 and other international norms like ACI318, JGJ107, UBC 1997,BS8110,NF35-20-1,DIN1045, and ISO 15835. ◆ Crafted from high-quality carbon and alloy steel tubes, they ensure end-to-end quality control. Customizable for size (diameter, thread pitch, length) and breaking force to
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The Rolling Straight Thread Rebar Coupler System stands as the industry benchmark for high strength coupler applications. This rebar splices and coupler system is engineered to deliver unmatched performance in structural reinforcement splicing. As a leading manufacturer, Tenjan provides this position rebar coupler solution designed for simple, precise, and r
View product →Our Seamless Round Steel Pipes are premium Circular Cross-Section Steel Tubes manufactured from Carbon Steel and Alloy Steel via advanced Cold-Drawn or Cold-Rolled processes. These Precision Cold-Drawn Tubes and Durable Alloy Steel Pipes excel in high-temperature, high-pressure, and corrosive conditions, ensuring reliable performance for Mechanical Processin
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S355JR Low-Alloy High-Strength Seamless Steel Tubes represent European EN standard low-alloy high-strength structural steel tubes engineered for applications requiring optimal balance between strength, toughness, and cost-effectiveness. These low-alloy structural tubes feature controlled carbon content ≤0.21% with manganese levels of 1.00%-1.70% and micro-al
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◆ Tenjan – Your Trusted Partner for Custom Seamless Alloy Steel Pipes Precision Customization "Scenario-based precision customization: Tailor-made round steel materials, mechanical properties, dimensional accuracy, and shapes to your exact needs—fully com
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◆ Tenjan – 21 Years of Expertise in Custom Seamless Carbon Steel Pipes Integrated large-scale production from raw material customization to finished pipes, with full in-house quality control—no outsourcing. ◆ Diverse Material Options Low-carbon steel, me
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Tenjan Company offers high-quality seamless steel pipes and precision seamless tubing. These products are manufactured through advanced cold drawing technology and cold rolling processes. These hollow structural components with different cross-sections are specially designed to exhibit outstanding performance in harsh application environments, possess excell
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Tailored Solutions for Unique Applications ◆ Special-Section Tubes – Hexagonal, Square, Rectangular, D-Shaped, Triangular, Lemon-shaped, Oval, and other complex cross-sections. ◆ Precision Customization – Material composition, mechanical properties, dimensional accuracy, and geometry tailored to your application. ◆Flexible Ordering – Small batches available
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Tailored Solutions for Unique Applications ◆ Special-Section Tubes – Hexagonal, Square, Rectangular, D-Shaped, Triangular, Lemon-shaped, Oval, and other complex cross-sections. ◆ Precision Customization – Material composition, mechanical properties, dimensional accuracy, and geometry tailored to your application. ◆Flexible Ordering – Small batches available
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Tailored Solutions for Unique Applications ◆Special-Section Tubes – Hexagonal, Square, Rectangular, D-Shaped, Triangular, Lemon-shaped, Oval, and other complex cross-sections. ◆ Precision Customization – Material composition, mechanical properties, dimensional accuracy, and geometry tailored to your application. ◆Flexible Ordering – Small batches available w
View product →Tenzhan Steel presents premium Seamless Square Tubes and Rectangular Steel Pipes manufactured from high-grade Carbon Steel and Alloy Steel Materials. Our Cold-Drawn Square Tubes and Precision Rectangular Pipes undergo specialized processing to achieve exceptional surface cleanliness - completely free from pits and marks, ensuring perfect preparation for subs
View product →ST52 Low-Alloy High-Strength Seamless Steel Tubes represent German DIN standard low-alloy high-strength structural steel tubes engineered for applications requiring optimal balance between strength, toughness, and cost-effectiveness. These low-alloy structural tubes feature controlled carbon content ≤0.20% with manganese levels of 1.00%-1.70% and micro-alloy
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STKM11A Seamless Steel Tubes represent Japanese JIS standard low-carbon steel tubular products with carbon content controlled below 0.15%. These low-carbon structural tubes are manufactured according to JIS G3445 standard, delivering exceptional plasticity, superior weldability, and reliable structural strength for applications requiring excellent formabilit
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Our Lemon Pipe Type Triangle Steel Tube is a specialized Seamless Triangular Steel Pipe engineered for high-performance agricultural applications. Manufactured via precision Cold-Drawing Technology, these Triangular PTO Shaft Tubes and Lemon-Profile Steel Pipes excel in transmitting torque and handling dynamic loads in Agricultural Drive Shaft Systems. Craft
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Triangular Steel Pipes represent our innovative line of three-sided seamless tubes featuring precision equilateral triangular cross-sections. These geometric-profile pipes are manufactured through advanced cold-drawing technology that transforms conventional round steel billets into high-precision triangular configurations, maintaining the inherent strength
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Y15 Free-Cutting Steel Seamless Tubes represent China's GB standard high-sulfur phosphorus composite free-cutting steel tubes specifically engineered for high-volume precision machining applications. Unlike conventional structural steels, these specialized seamless tubes feature optimized chemical composition with controlled carbon content 0.12%-0.18%, manga
View product →Send us your grade, dimensions, tolerance and application. Our engineering team will help define the right solution.
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