Product name: ISO cerfitication cold finished steel pipe st52

1.Raw material:20#.45#,Q345,16Mn,25Mn,27SiMn

2.ID:30-250mm

3.ID tolerance:H7,H8,H9   or as customized

4. Final supply condition: BK/BKW/BKS/GBK/NBK

5. Machining allowance:0.5-1.5mm

6.Length: Max 11M

Our main products

1 Hydraulic Cylinder Tube

Used in the hydraulic cylinder of the heavy machinery, Cranes, excavator also forklifts. We can work and get the mechanical property of the clients need.

2. SRB tube

Directly used in Elevatorbuffer and Hydraulic Cylinder .This kind tube have a better inner roughness , ra0.2-0.4um and can use directly in the hydraulic cylinder tube. Length can work at most 6M.

3. Cold finished tube

Widely Used. Processing range 30-300mm, biggest length is 11M.

• Superior surface finish
• Dimensional accuracy and excellent micro-structure uniformity
• Enhanced machinability
• High strength to weight ratio
• Tight tolerances, resulting in reduced machine time
• Applications: hydraulic cylinders, rollers, structural apps, truck and automotive parts.

Technique and tolerance

 Process

Equipped with JLB250T hydraulic cold drawn set, LD120 cold rolling set, annealing furnace, strong honed machine, polishing machine, lathe, saws CNC skived and roller burnished machine, kinds of testing machine.

Delivery condition

1. NBK(+N)

after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium

2. GBK(+A)

after cold forming, annealing in non oxidizing medium protective gas

3. BK(+C)

the final heat treatment after cold forming, therefore small steel pipe plastically, the plastically degree does not guarantee

4. BKW(+LC)

after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring)

5. BKS(+SR)

have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing

Services

1.passing ISO9001 system verified and in high quality control

2.with more than 20 years trading experience

3.offering superior quality and competitive price

4.treating every client sincerely to satisfy them

FAQ

Q: what about your standard delivery date?

A: 30 days after receiving deposit

Q: How about your capacity?

A: For steel pipes, 500 tons per month, 6000 tons per year.

Q: what about your package

1. bundle packing

2. marking as per customer's requests

3. paint on the pipe as per customer request

4. pipe caps as customer reques

Q: What is your main market &main customers

A: We have 23years experience on steel pipes .Our main market includes China, Korea,  Pakistan etc.   

Q: If products have some quality problem,how would you deal with?

A: We will responsible for all of our quality problems and we are trade assurance supplier.

More products details pls contact us!