1. Advantages/Benefits of Our Round Seamless Steel Tube

(1) Precise custom outer diameter and inner diameter

(2) Tight tolerances, resulting in reduced machine time / Dimensional accuracy

(3) Smooth and Clean OD and ID surfaces

(4) Excellent machining characteristics

(5) Wider range of physical properties attainable through process and annealing options

2. Product Description /Specifications

3. Cold Drawing VS Cold Rolling Technics

                                         Cold Drawn Steel Tube

                                          Cold Rolled Steel Tube

                            Cold Drawn VS Cold Rolled Steel Tubes

Cold Drawing Technique

1. Through special alloy steel mould cold drawn forming

2. Small deformation

3. Inside and outside surface bright and clean

4. Hardness moderate

5. Suitable for machining

6. Special shape tube necessary procedure

Cold Rolling Technique

1. Through the roller repeatedly rolling the outer surface forming

2. Large deformation

3. Outer surface bright with a mirror effect

4. High hardness

5. Suitable for terminal products

6. High surface requirement tube necessary procedure

    
Combination of Cold Drawing and Cold Rolling

1. High-end products adopt the combination mode of cold drawn and cold rolled.

2. Suitable for subsequent machining

3. Perfect surface

Examples: rifle barrel, shock absorber

4. Application

4. Custom Features

(1) Solutions

Tenjan can provide customized solutions based on the USE of steel tubes or rebar couplers in order to improve product quality and save more comprehensive costs.

(2) Product Customization

Both seamless steel tubes and rebar couplers can be customized under requirements of steel grade, size, MECHANICAL PROPERTY and surface quality. Steel grade follows international standards ASTM A519, ASTM A106, ASTM A500, ASME SA500, DIN2391, DIN1629, EN10305-1, DIN17121, EN10297-1, JIS3441, JIS3444 and JIS3445

(3) Small Batch Customization

Tenjan can satisfy customers’ need of small batch order with customization requirements.

(4) Alloy Steel Material Customization

Tenjan is specialized in producing alloy steel tubes with wide production range. Advanced automatic annealing facility can control temperature difference within 2℃ to ensure alloy steel tube with stable mechanical properties.

(5) Shape Customization

Thick-walled and shaped seamless steel tubes are our advantage product which can be customized according to customers’ needs.

(6) Value added Machining

Tenjan provides value added machining products based on steel tubes, such as bushing, couplers or machining according to drawings. The machining service includes cutting, chamfering, tapping and laser marking

5. Why Choose Tenjan?

(1) Large Scale Production，Strong R&D Capability

The annual production capacity can reach 60,000 tons under years of development. Every-year R&D investment and a team of technicians enable Tenjan with strong R&D capability. Tenjan has full system of production with advanced equipment, such as perforation, pickling, cold rolling, cold drawing, straightening, flaw detection, tensile test and machining.

(2) Quality Control 

Every batch of products can be traced and guaranteed by the raw material certificate and steel tube quality certificate. Complete quality control system, following ISO9001, to ensure a full inspection process such as pull force test, chemical composition test and eddy current detection.

(3) Certification

The chairman of Tenjan, Mr. Wensheng Gu, is one of the major constitutors of national standard Couplers for Rebar Mechanical Splicing JG/T 163-2013. And Tenjan has won the Quality System Certificates of ISO9001 and IATF16949.

(4) Major Customer Case

We have long-term relationship with customers such as BMW, MCC, CNNP, CRRC, Midea, Sinohydro, China Pingmei, China Academy of Building Research and so on.

(5) Export Countries

Our products were exported to Europe, America, Japan, South Korea, The Middle East, Southeast Asia and in total six continents over 20 countries, and which has been consistently trusted by customers.

(6) Customer Service

Tenjan provides considerate service to every customer with fast feedback, quality track and technical support.  

6. Production Process

(1)Raw material storage -- (2)Raw Material Inspection -- (3)Cutting by saw machine -- (4)Hot porforation -- (5)Squeeze head -- (6)Raw tube quality inspection -- (7)Cycling Pickling -- (8)Cycling cold drawing/rolling -- (9)Cycling Annealing -- (10)Straighting -- (11)Head&tail cutting -- (12)Eddy current inspection -- (13)Finished product inspection -- (14)Packing

7. International Steel Grade Table