Welcome to Changzhou Tenjan Steel Tube Co., Ltd

Seamless Alloy Steel Tubes

◆ Tenjan – Your Trusted Partner for Custom Seamless Alloy Steel Pipes. Scenario-based precision customization: Tailor-made round steel materials, mechanical properties, dimensional accuracy, and shapes to your exact needs—fully compliant with ASTM , DIN/EN , JIS , GOST and other international standards.

Special-Shaped Alloy Steel Tubes

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 with value-added services (machining, etc.)

8620 Alloy Pipe

8620 Alloy Seamless Steel Tubes represent American SAE standard low-carbon nickel-chromium-molybdenum alloy steel tubes engineered for carburizing applications requiring exceptional surface wear resistance combined with core toughness.

16MnCr5 Steel Pipe

16MnCr5 Alloy Seamless Steel Tubes represent German DIN standard manganese-chromium alloyed structural steel products engineered for high hardenability and exceptional wear resistance in precision mechanical applications.

34MnB5 Alloy Pipe

34MnB5 Alloy Seamless Steel Tubes represent German DIN standard manganese-boron alloyed structural steel products engineered for high strength and excellent hardenability at competitive cost levels.

5140 Steel Pipe

5140 Alloy Seamless Steel Tubes represent American ASTM standard chromium-alloyed structural steel products engineered for medium-to-high strength and anti-fatigue applications.

5120 Alloy Pipe

5120 Alloy Seamless Steel Tubes represent American ASTM/SAE standard low-carbon chromium-alloyed structural steel products engineered for case hardening applications requiring balanced strength, processability, and cost-effectiveness.

41Cr4 Alloy Pipe