Seamless steel tubes quenching and tempering
Product Specifications
The small diameter seamless steel tubes has been hardened again heated to a certain temperature, then some method of cooling is called pipe tempering. Its purpose is to eliminate the internal stress generated by quenching, to reduce the hardness and brittleness, to obtain the desired mechanical properties. Tempering is divided into high temperature tempering, middle temperature tempering and low temperature tempering.
Seamless steel pipe tempering after quenching heated to below the critical temperature, holding time, and then cooled in air or oil. Immediately after quenching and tempering is carried out, is also the last step of heat treatment.
① obtain the desired mechanical properties. In general, part of the strength and hardness after quenching is greatly improved, but there is significantly lower ductility and toughness, while the actual working conditions of the parts require good strength and toughness. Select the appropriate tempering temperature after tempering, the required mechanical properties can be obtained;
② stable organization and stable size;
③ eliminate stress.
Tempering category
(1) tempering the hardened steel is heated to 150-50oC, and at this temperature for a certain time, and then cooled in air, tempering used for cutting tools, measuring tools, molds, Rolling and carburizing parts, etc. Eliminate stress due to quenching of steel produced.
(2) tempering the quenched steel is heated to 350 to 450%, after holding for some time to cool down, generally used for all kinds of hot springs and other parts die. The steel to obtain a higher elastic member, a certain toughness and hardness.
(3) heating the steel to high-temperature tempering after quenching to 500 ~ 650oC, after the cooling after heat is mainly used for high strength, high toughness important structural parts, such as spindles, crankshaft, cams, gears and connecting rods.
1.Product Description /Specifications
Production Range | Outer Diameter：10-120mm (0.4 inch - 4.7 inch) |
Wall Thickness：1-20mm (0.04 inch - 0.78 inch) | |
Material / Grade | 45# 40Cr 1045 S45C 5140 C45 080M46 520M40 SCr440 42C4 41Cr4 |
Tolerance | Tolerance ±0.15mm，Superior products ±0.05mm, Can be customized according to customer’s requirements |
Technique | Cold Drawn / Cold Rolled |
Shape | Round |
Further Processing for Steel Tubes | Final Annealing, Cutting, Chamfer, Threading, Inner diameter or Outer Diameter Lathe, Surface Shot Blasting, Laser Marking |
2. Product Photos
Cold Drawing
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
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. International Steel Grade Table
International Steel Grade Table | |||||
China | ASTM A519 | DIN | JIS 3445 | JIS G4051 | |
Carbon Steel | 10# | 1010 | DIN C10/CK10 | STKM11A | S10C |
20# | 1020 | DIN C22/CK22 | STKM12A/STKM12B/ STKM12C | S20C | |
25# | 1026 | STKM13A/STKM13B/ STKM13C | S25C | ||
35# | 1035 | DIN C35/CK35 | S35C | ||
45# | 1045 | DIN C45/CK45 | S45C | ||
55# | S55C | ||||
CF53 | 1050 | CF53 | |||
Q235B | |||||
Q235C | |||||
A105 | |||||
Alloy Steel | 16Mn(Q345B） | St52 | |||
20Cr | 5120 | 20Cr4 (EN 10084-1998) | JIS SCr420( JIS G4053) | ||
40Cr | 5140 | 41Cr4(1.7035) | JIS SCr440( JIS G4053) | ||
15CrMo | 15CrMo4 | SCM415 (JIS 4053) | |||
20CrMo | 25CrMo4(1.7218) | SCM420 (JIS 4053) | |||
28CrMo | |||||
30CrMo | 4130 | ||||
35CrMo | 4135 | 35CrMo4(1.7220) | SCM432/SCRRM3 | ||
42CrMo | 4140 | 42CrMo4(1.7225) | SCM4 | ||
20CrMnTi | |||||
40MnMoV | |||||
20Mn2 | |||||
ZF6 | 16MnCr5(1.7131) | ||||
16MnCr5 | |||||
20MnCr5 | |||||
38Mn2V | |||||
36Mn2V | |||||
09CrCuSb(ND钢) | |||||
Steel Tube Standard | Seamless Steel Tubes for Structural Purposes GB/T 8162-2018 | ASTM A519 | DIN17121/EN 10297-1 | JIS3441/JIS3444/JIS3445 | |
Seamless Steel Pipes for Liquid Service GB/T 8163-2018 | ASTM A106 | ||||
Seamless Cold-drawn or Cold-rolled Steel Tubes for Precision Applications GB/T 3639-2009 | DIN1629/DIN2391 / EN 10305-1 | ||||
Cold Drawn Shaped Steel Tubes GB/T 3094-2012 | ASTM A500 / ASME SA500 | ||||
Seamless Steel Tubes for Automobile Stabilizer Bar GB/T 33821-2017 | |||||
Rebar Coupler Standard | Couplers for Rebar Mechanical Splicing JG/T 163-2013 | ||||
Certificate
Our Certificate：
| ISO 9001 | IATF 16949 |
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.