high quality cold drawn seamless small diameter steel tubing

Commodity

high quality cold drawn seamless small diameter steel tubing

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

40*50

90*110

140*170

190*215

40*55

95*110

145*170

190*220

50*60

95*115

150*170

190*225

50*65

100*110

150*175

200*220

55*70

100*114

150*180

200*225

60*70

100*115

155*180

200*230

60*75

100*120

160*175

200*245

60*78

100*125

160*180

200*250

63*73

105*125

160*185

220*250

63*75

110*125

160*190

220*270

63*76

110*130

160*195

225*250

63*78

115*130

165*190

240*273

65*80

115*135

165*205

250*290

70*80

120*140

170*200

250*300

70*82

125*140

180*200

260*300

70*85

125*145

180*205

280*323

70*90

125*150

180*210

280*355

75*90

130*150

180*215

300*350

80*92

130*155

180*220

200*213

80*95

130*160

185*205

200*216

80*100

135*160

185*215

250*266

85*100

140*160

185*220

90*105

140*165

190*210

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

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

1.100% PMI,Spectro Chemical Aanlysis Test for Raw Material

2.100% Dimension & Visual Examination 

3. Mechanical Properties Test Include Tension Test,Flaring Test (For Seamless tube/pipe)/ Flange Test (For Welded Pipe & Tube), Hardness Test ,Reversed Flattening Test

4.100% Hydrostatic Test or 100% NON-DESTRUCTIVE Test  (ET or UT) 

5.Radiographic Test for Welded Pipe (shall be accordance with specification,or shall be as agreed upon between the purchaser and vendor)

6.Straightness Test  (optional)

7.Roughness Test (optional)

8.Intergranular Corrosion Test(optional)

9.Impact Test (optional)

10.Grain Size Determinations (optional)

NOTES : ALL THE TESTS AND INSPECTION RESULT NEED TO BE SHOWED IN REPORTS ACCORDING TO STANDARD AND SPECIFICATION.