Product Name

cylinder tube

Standard

DIN2391, EN10305, ASTM A519, GB/T 3639-200

Material

Q355B Q355D C20,ST52,E355 SAE1026.CK45 4130 4140 STKM 13C

Heat treatment

BK+S

Specification

 Outer diameter(mm) : 40-480mm

I.D Tolerance

H8-H9

Length

Fixed Length, Random Length(3--9m)or as requests of customers

Straightness

0.5-1/1000

ID roughness

RA 0.1-0.8micron(max)

Payment term

FOB, CFR, CIF ,EXW, FCA and so on

MOQ

3 tons

Technology

Honed & SRB(SKIVED AND ROLLER BURNISHED )

Application:

 hydraulic cylinder, swivel crane, injection machine and so on 

Conservation

anti rust oiled inside and outside surface, plastic caps in both ends

Package

 bundle with steel strip and knitting strip, or wooden case

Steel Grade

C

SI

Mn

P

S

Cr

Ni

Cu

20#

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

0.250

45#

0.42-0.50

0.17-0.37

0.50-0.80

0.035

0.035

0.250

0.250

Q345B

≤0.2

≤0.5

1.00-1.60

0.030

0.030

0.030

0.250

0.08

Q345D

≤0.2

≤0.5

1.00-1.60

0.030

0.030

0.250

0.250

0.15

25Mn

0.22-0.29

0.17-0.37

0.70-1.00

0.035

0.035

27SiMn

0.22-0.32

1.10-1.40

1.10-1.40

0.035

0.035

0.300

0.300

E355

≤0.2

≤0.55

≤1.6

0.025

0.025

SAE1026

0.22-0.28

0.15-0.35

0.60-0.90

0.040

0.050

Steel Grade

Rm Mpa

ReH Mpa

Elonggation

cold finished Rm Mpa

cold finished Elonggation

20#

≥520

≥375

≥15

≥550

≥8

45#

≥600

≥520

≥10

≥640

≥5

16Mn(Q345B /D)

≥600

≥520

≥14

≥640

≥5

25Mn

≥600

≥510

≥15

≥640

≥5

27SiMn

≥760

≥610

≥10

≥800

≥5

St45

≥520

≥375

≥15

≥550

≥5

E355(st52)

≥600

≥520

≥14

≥640

≥5

SAE1026

≥600

≥510

≥15

≥640

≥5

Working method

range

ID

H8

H9

H10

cold drawn

25-250

30-50

+0.0390

+0.0620

+0.1000

cold rolling

25-150

50-80

+0.0460

+0.0740

+0.1200

cold drawn-honed

40-250

80-120

+0.0540

+0.0870

+0.1400

cold drawn-SRB

50-250

120-180

+0.0630

+0.1000

+0.1600

cold drawn -polished

40-250

180-250

+0.0720

+0.1150

+0.1850

cold drawn-polish-SRB

50-250

as required

as required

as required

as required