Product: whole sale stress relieved seamless steel pipe DIN2391

Technical specification: Suitable for hydraulic cylinder

Grade:20# 45# 16Mn 25Mn 27SiMn

Outer diameter: 30-250mm

Wall thickness: 2-30mm

ID tolerance: H7 H8 H9 or as customized

Package: standard packing with plastic bags  or wooden cartons or as client's request

Delivery time: within 20-30 days after receiving downpayment or as client's request

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

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

Process

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

Certification

Passing Verified System ISO9001, all our products are in tight tolerance and high quality control.

Delivery conditions

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

Application

Widely used in hydraulic system with precision steel tube,injection molding machine with precision steel tube, hydraulic press machien with precision steel tube, shipbuilding with steel tube, EVA foaming, hydraulic machine, hydraulic cutting machine, shoemaking machine, hydraulic equipment,  hydraulic tubing,, engineering machine, textile machine, printing machine, oil drilling and other field.

Our service

1.Flexible payment terms

2.Surface protect

3.Quick delivery

4.More than 20 years steel trading experience

5.Alibaba trade assurance supplier

Waiting for your contact!