Ultra high precision steel pipe

Ultra high precision steel pipe Definition

We use cold drawn, cold rolling, and honing producing process to get ultra high precision steel pipe, which can be used on manufacturing hydraulic gas cylinder, Pump barrel and other precise products.
OD: 18~400mm
WT: 1.5~40mm
Grade: 10, 20, 35, 45, Q345-B, 16Mn, 37Mn5, 27SiMn, 20Cr, 40Cr and so on.
Standard: as per GB8713, GB3639

Ultra high precision steel pipe Size Range

Produce Style Outside Diameter Length Straightness mm Size Precision Inner Hole Roughness μm  
Cold Rolling 18-100mm ≤12m 0.3~1.0/1000 H8-H10 0.4~1.6
Cold Drawn 30-400mm ≤10m 0.3~1.0/1000 H8-H10 0.8~1.6
Honing 32-400mm ≤12m 0.3~1.0/1000 H8-H9 0.4~0.8
Mechanical Property of cold drawn and cold rolling precision steel tube
Grade Delivery Condition
  Cold-work/hard+C Cold-work/soft+LC Stress relief annealing+SR Annealing +A Normalizing+N
  Rm MPa A % Rm MPa A % Rm MPa ReH MPa A % Rm MPa A % Rm MPa ReH MPa A %
  Not less than
10 430 8 380 10 400 300 16 335 24 320~450 215 27
20 550 5 520 8 520 375 12 390 21 440~570 255 21
35 590 5 550 7 -- -- -- 510 17 ≥460 280 21
45 645 4 630 6 -- -- -- 590 14 ≥540 340 18
Q345B 640 4 580 7 580 450 10 450 22 490~630 355 22

Ultra high precision steel pipe image

FAQ

1What is the production process for cold rolling steel pipes?
Inspection on billets-peeling- raw materials chemical inspection-heating-piercing-pickling- cold rolling- removing oil- cutting ends- surface and size inspection-marking- packing
2How to solve the wall deviation problem of precision steel pipe?
When the blank pipe is deviated from the wall and the round steel is perforated, the punching head of the round steel is slightly deviated, the staff who come out of the pipe can not check clearly, or the staff makes mistakes in checking, and the staff does not check carefully when cutting off the redundant pipe head.
3Compared with the general seamless pipe, the characteristics of precision steel pipe?
A. smaller outer diameter. B. high precision and can be used for small batch production. C. the cold-drawn finished product has high precision and good surface quality. D. The cross area of steel pipe is more complicated with internal impurities. E. the better the steel pipe performance, the denser the metal.