Cold Drawn St45 20# Mild Steel Tubing Honing Steel Pipes For Hydraulic Cylinder , DIN 2391 EN 10305

Processing form

I.D.mm

Length

Straightness

I.D.tolerance

I.D.Roughness(RA)

Cold-rolled

30-100

≤24M

0.3-1.0/1000

H8-H10

0.4-1.6um

Cold-drawn

30-250

≤24M

H8-H10

0.8-1.6um

Hone

40-500

≤24M

H8-H9

0.4-0.8um

SRB

50-250

≤24M

H8

0.1-0.4um

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

BK

Cold finished(hard)

BKS

Cold drawn and stress-relieved

Steel grade

Rm Mpa

Elongation
A5(%)

Rm?MPa

ReH?MPa

Elonggation
A5(%)

ST45

≥550