Product: Cold drawn and stress relieved steel pipe

Grade:20# 45# Q345 25Mn 27SiMn

Outer diameter: 30-250mm

Wall thickness: 2-30mm

ID tolerance: H7 H8 H9

Delivery condition: cold drawn /cold rolled and stress-relieved(BK+S)

Trade terms: FOB Yantai, Qingdao or as client's request

Payment terms: T/T, or L/C or as client's request

The difference between precision steel pipe and seamless pipe?

1. the seamless steel tube with obvioue difference is that dimensional accuracy, can be up to 0.1mm.

2. high precision steel pipe diameter surface finish, the customer without processing can be used directly and ordinary seamless steel tube to the customer and lather, polishing processing.

Process

Mechanical Property

Our customer

Packing and shipping

1. bundle packing

2. marking as per customer's requests

3. paint on the pipe as per customer request

4. pipe caps as customer request

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

Waiting for your contact!