manufacturing precision seamless honed steel tube

Commodity

manufacturing precision seamless honed steel tube

Items

Seamless steel tube

Cold drawn/rolled tube

Honed tube

Length

According to the customer’s need

Tolerance

H8 H9,H10 or as customer’s need

Surface roughness

Ra0.2-0.8µm

Standard

Round pipe: GB/8163-2008, GB 8162-2008, ASTM A 106, DIN2391,  1

ASTMA519 

Grade

Q345,10#-45#,ST35-ST52,16Mm

Application

Hydraulic cylinder, automobile, oil drilling, textile machinery,etc.

Inspection

With hydraulic testing, eddy current and infrared test.

Normal Seaworthy Packing

1. Bundle packing.

2. Beveled end or plain end or varnished as per buyer's requests.

3. Marking: as per customer's requests.

4. Painting varnish coating on the pipe.

5. Plastic caps at ends or according to your request.

Delivery Time

Less than 25days after the advanced payment

Payment Terms

T/T or L/C

Outer diameter

30-250mm

Finally condition

BK BKS BKW  NBK GBK

Mechanics performance:

Material

Tensile strength

Yield strength

Elongation

Hardness

CK20/20#/AISI1020

>520 N/ mm2

>375 N/mm2

>15%

>85HB

CK45/45#/AISI1045

>600 N/ mm2

>520 N/ mm2

>15%

>85HB

ST52/16Mn/Q345D

>600 N/ mm2

>520 N/ mm2

>15%

>85HB

25Mn/STKM 13C-T

>600 N/ mm2

>530 N/ mm2

>15%

>85HB

Variety :

Processing

Cylinder 
Diameter

Straightness

Size 
Accuracy

W.T/mm

Inner Bore Roughess

Cold drawn/cold rolled

ID30-250

0.3

H9-H11

±10%

0.4~1.6um

Honed tube

ID50-250

0.3

H7-H9

±10%

<0.4um

Tolerance on ID:

No.

Inside diameter
(mm)

ID machining allowance
(mm)

1

300-80

0.5-0.8

2

81-125

0.7-1.1

3

125-200

0.9-1.2

4

200-250

1-1.5

Other dimension can be customize