DIN cold drawn precision steel tube mill

Product Details

The outer diameter of DIN cold drawn precision steel tube mill is 25mm -500mm,and the wall thickness is 2-50mm. It`s standard is GB/T8713-88, GB/T3639-2009, DIN2391, EN10305.

Cold Drawn Tube can be produced according to the demands of costumers that the degree of precision can reach H9/H11.

For smaller tubes of better size and better quality, cold rolling, cold drawing, or a combination of the two must be used. Cold rolling is usually carried out on a two-roll mill in which the steel pipe is rolled in an annular hole type composed of a variable-section circular hole groove and a stationary tapered head. Cold drawing is usually carried out on a single-chain or double-chain cold drawing machine of 0.5 to 100T. The cold drawn steel pipe is produced by drawing, extrusion, perforating, etc., and the entire steel pipe has no seams on the surface of the steel pipe. It is a circular, square, rectangular steel with a hollow section and no seams around it. The steel tube or the solid tube blank is made into a capillary tube by perforation, and then made by cold dialing.

Cold drawn steel pipe is a precision cold drawn seamless pipe for mechanical structure, hydraulic equipment with high dimensional accuracy and good surface finish. The use of precision seamless pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining time, improve material utilization, and improve product quality.

Material & Chemical Composition:
EN10305 standard E355, 16Mn, DIN2391 standard ST52, ASTM A106B, C20/20#, CK45

Material

C

Si

Mn

S(=)

P(=)

Cr

Ni

Mo

other

A106B / C20#

0.17-0.23

0.17-0.37

0.35-0.65

0.035

0.035

=0.25

=0.30


Cu=0.25

CK45#

0.42-0.50

0.17-0.37

0.50-0.80

0.035

0.035

=0.25

=0.30


Cu=0.25

Q345B

=0.20

=0.55

1.00-1.60

0.040

0.040

V:0.02-0.15

Nb:0.015-0.06

Ti:0.02-0.20

Alt=0.015

ST52
E355
16Mn

=0.20

=0.55

1.00-1.60

0.045

0.045

V:0.02-0.15

Nb:0.015-0.06

Ti:0.02-0.20

16Mn

25Mn

0.22-0.30

0.17-0.37

0.70-1.00

0.035

0.035

=0.25

=0.25



27SiMn

0.24-0.32

1.10-1.40

1.10-1.40

0.030

0.030





42CrMo

0.38-0.45

0.17-0.37

0.50-0.80

0.025

0.025

0.90-1.20


0.15-0.25


Dimension tolerance:

Inner Dia (mm)

ID Tolerance (mm)

WT Tolerance (mm)

H7

H8

H9

H10

H11

30

+0.021/0

+0.038/0

+0.052/0

+0.084/0

+0.130/0

±5-10%

>30-50

+0.025/0

+0.039/0

+0.062/0

+0.100/0

+0.160/0

>50-80

+0.030/0

+0.046/0

+0.074/0

+0.120/0

+0.190/0

>80-120

+0.035/0

+0.054/0

+0.087/0

+0.140/0

+0.220/0

>120-180

+0.040/0

+0.063/0

+0.100/0

+0.160/0

+0.250/0

>180-250

+0.046/0

+0.072/0

+0.115/0

+0.185/0

+0.290/0

>250-315

+0.052/0

+0.081/0

+0.130/0

+0.210/0

+0.320/0

>315-400

+0.057/0

+0.089/0

+0.140/0

+0.230/0

+0.360/0

Product description:

Processing Form

I. D

Length

Straightness

I. D Tolerance

I. D Roughness

Cold-rolled

30-100

= 12M

0.3-1.0

H8-H10

0.4-1.6

Cold-drawn

30-250

= 12M

0.3-1.0


0.8-1.6

Hone

40-500

= 12M

1000

H8-H9

0.4-0.8

SRB

40-400

= 7M

1000

H8-H9

0.1-0.4

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Any questions or inquiries will be highly appreciated.

Kindly please contact us freely at gracewang@ruichengsteel.cn

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