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Product Description
Precision annealing refers to the technology of cold drawn precision steel tubes and precision bright steel tubes, which are annealed according to the customer's requirements for flexibility. Annealing is divided into open flame annealing and oxygen free annealing.
Open fire annealing is to burn the furnace body to the temperature of steel pipe from 800 to 1100 degrees, to achieve the softness required by customers.
Oxygen free annealing can not only achieve the softness, so that customers can use at ease, but also will not produce oxide skin.
The oxygen free annealing furnace adopts the method of electric heating, pre vacuumizing and protecting atmosphere, and isothermal spheroidizing annealing furnace realizes the oxidation free annealing of workpieces by preheating the front and rear vacuum nitrogen protection. The equipment has the characteristics of low atmosphere consumption, low energy consumption, clean subsequent processing, fast and uniform heating speed, which greatly shortens the annealing process time, so that there is little oxidative decarburization of the workpiece after annealing, and the increased depth of the depleted carbon layer is ≤ 0.05mm. The annealing quality is superior to the requirements of JB/T1255-2001 and other standards. The metallographic structure is fine and evenly distributed, realizing the purpose of high efficiency, high quality, low consumption and automatic continuous production of spheroidizing annealing. Cold rolled strip annealed in protective atmosphere without oxidation and decarburization on the surface. The protective atmosphere includes a single inert gas argon or helium, and also a mixed gas CO-H2-N
The oxygen free annealing furnace adopts the method of electric heating, pre vacuumizing and protecting atmosphere, and isothermal spheroidizing annealing furnace realizes the oxidation free annealing of workpieces by preheating the front and rear vacuum nitrogen protection. The equipment has the characteristics of small atmosphere consumption, low energy consumption, clean subsequent processing, fast and uniform heating speed, which greatly shortens the annealing process time, so that there is little oxidative decarburization of the workpiece after annealing, and the increased depth of the depleted carbon layer is ≤ 0.05mm. The annealing quality is superior to the requirements of JB/T1255-2001 and other standards. The metallographic structure is fine and evenly distributed, realizing the purpose of high efficiency, high quality, low consumption and automatic continuous production of spheroidizing annealing.
Shandong Jianlong Iron and Steel Co., Ltd. is a company with more than 10 years of experience. We are located in Liaocheng, one of the largest steel producing areas in China. We have our own production plant. We also deal in prepainted steel coil, corrugated roofing sheet , etc. Welcome to purchase.
Product Specification
|
Name |
CK45 Annealed Steel Pipe Cold Rolled Steel Tube |
|
Outer Diameter |
30-250mm |
|
Wall Thickness |
2-30mm |
|
Material Grade |
20# 45# Q345B Q345D 25Mn 27SiMn E355 |
|
Certificate |
ISO9001 2008 |
|
Standard |
GB/T8713,GB/T3639,DIN2391,EN10305,ASTMA519 |
|
Technique |
ASTM, ASME, A/SA 192, 209, 210 and 213 specifications and all associated grades. EN 10216, DN 17175,BS 3059, JIS 3461 – 3462 |
|
Package |
1. bundle packing |
|
Application |
Widely used in hydraylic and pneumatic cylinder for automobile, engineering machinery, textile machinery, etc. |
|
Delivery Condition |
BK/BKW/BKS/GBK/NBK |
|
Delivery Time |
Within 20-30 days after receiving downpayment or as client’s request |
|
Trade Terms |
FOB Yantai, Qingdao, or as client’s request |
Product Display
Packaging And Transportation
FAQ
1.Why you choose us ?
Our company has been 12 years. We control the quality of the products very strictly, there are special people for the quality.
If you got lower price from other supplier ,we will pay back twice to customers about the higher price.
2.How long is your delivery time?
According to the quantity.Generally within 2-7 days if in stock.And 15-20 days if not in stock.
3.What is your payment terms?
A: By T/T 30% in advance ,and 70% before delivery.
B:100% L/C at sight.
C:By T/T 30% in advance,and 70% L/C at sight.
4.Do you provide samples ? Is it free?
Yes, we offer the sample for free but do not pay for the cost of freight.
5.What if the customer is not satisfied?
If there is a problem with the product,we take full responsibility.
If there is a problem in the transportation process,we will help you to solve it.
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Main Product:
Seamless Steel Pipe,
Galvanized Steel Sheets,
Carbon Steel Sheet,
Galvanized Steel Coil,
Seamless Steel Tube,
Stainless Steel Plate
