precision carbon steel seamless tube st37.4

Article

  precision carbon steel seamless tube st37.4

Surface

according to the customer’s acquirement

Length

1m - 6m or as your requirement

W.T.

2-30mm

O.D.

30-250mm

Application

Vehicles, engineering machinery hydraulic chassis, air piping system, etc

Packing

We usually bundle with steel strips ,branding parcel ,wooden box

Terms conditions

CIF,CFR,FOB

Payment

should be 30% in advance by T/T and the balance upon B/L copy or L/C.

Delivery Time

25 days after received the deposit by T/T

Note

we can produce other standard as the customers' requirement

Size of I.D

I.D Tolerance

Tolerance of wall thickness

H8

H9

H10

±7.5%

>210mm ±10%

30

+0.0330

+0.0520

+0.0840

>30-50

+0.0390

+0.0620

+0.1000

>50-80

+0.0460

+0.0740

+0.1200

>80-120

+0.0540

+0.0870

+0.1400

>120-180

+0.0630

+0.1000

+0.1600

>180-250

+0.0720

+0.1150

+0.1850

>250-315

+0.0810

+0.1300

+0.2100

Delivery 
condition

cold finished(hard)(BK)

Cold drawn and stress-relieved(BK+S)

Steel grade

Rm MPa

Elongation
A5(%)

Rm MPa

ReH MPa

Elonggation
A5(%)

St45

≥550

≥5

≥520

≥375

≥15

20#

≥550

≥8

≥520

≥375

≥15

St52 (E355)

≥640

≥5

≥600

≥520

≥14

SAE1026

≥640

≥5

≥600

≥510

≥15

STKM 13C

≥550

≥8

≥520

≥375

≥15

Q345B

≥640

≥5

≥600

≥520

≥14

CK45

≥640

≥5

≥600

≥520

≥10

Steel grade

Chemical composition,%

C

Si

Mn

P

S

Cr

≤

St45 (20#)

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.25

ST52(E355)

≤0.22

≤0.55

≤1.6

0.025

0.025

0.25

SAE1026

0.22-0.28

0.15-0.35

0.6-0.9

0.04

0.05

/

STKM 13C

≤0.25

≤0.35

0.3-0.9

0.04

0.04

/

Q345B

≤0.2

≤0.5

1.0-1.6

0.03

0.03

0.30

CK45

0.42-0.50

0.17-0.37

0.5-0.8

0.035

0.035

0.25

     Application

Cold drawn or cold rolled precision seamless steel tubes

for hydraulic pressure and pneumatic services.

For Auto use,machinery use,oil cylinder tube,

motorcycle shock reducer use,auto shock reducer inner cylinder,gas spring use etc.

Seamless steel pipes for low and medium pressure boiler,

 high pressure boiler, ship-building,Liquid service, petroleum cracking, 

chemical fertilizer equipment,Drawing-oil-equipment and structure purposes.