Honed tube for hydraulic cylinder

Standard

DIN2391, EN10305, JIS G3445, ASTM A519, GB/T 8713...

Material

ST45, ST52, E355, E355SR, STKM13C, SAE1026, 20#, Q235B, CK45...

Heat treatment

BK+S

Specification

Outer diameter(mm)                               

Inner diameter(mm)                               

40-400mm

30-320

I.D Tolerance

H8-H9

Length

3-9m (Customers usually choose the 4~5.8m)

Straightness

1/1000

ID roughness

RA 0.4micron(max)

Technology

Honed & SRB(SKIVED AND ROLLER BURNISHED )

Scope

Honed tube for hydraulic cylinder, swivel crane, injection machine and 

construction machine application

Steel Grade

Chemical Composition (%)

C

Si

Mn

P

S

Cr

≤

St45

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

ST52(E355)

≤0.22

≤0.55

≤1.6

0.025

0.025

0.25

SAE1026

0.22-0.28

0.15-0.35

0.60-0.90

0.040

0.050

/

27SiMn

0.24-0.32

1.10-1.40

1.10-1.40

0.035

0.035

0.300

20#

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

Delivery condition

BKS

Cold Drawn & Stress-Relieved

Steel Grade

Rm MPa

ReH MPa

Elongation A5(%)

ST45

≥520

≥375

≥15

ST52(E355)

≥600

≥520

≥14

SAE1026

≥600

≥510

≥15

16Mn

≥600

≥520

≥14

20#

≥520

≥375

≥15