4140 round seamless carbon steel hydraulic cylinder tube

Dimension

O.D.30-250mm   W.T.:2-30mm   L: according to the customer’s need

Steel Grade

10#,20#,45#,16Mn, ST35, ST37,ST37.4,ST45,ST52,ST52.4, E255,E355,Q345 etc

Standards

DIN  /ASTM /GB/ EN/ etc

Delivery Condition

NBK(+N), GBK(+A), BK(+C) ,BKW(+LC) ,BKS(+SR)

Application

Automotive pipeline system; hydraulic system of diesel engine and engineering machinery; hydraulic system of locomotive, aerospace and aviation, shipbuilding and various machinery; metal processing of wind power equipment;

Surface treatment

According the customer’s acquirements

Packing

We usually bundle with steel strips ,branding parcel or wooden box outside ,or according to the customer’s need

Certificate

ISO 9001:2008

Basic Inspection

Chemical analysis ,mechanical testing, eddy current test and ultrasonic

OD x WT

OD x WT

OD x WT

OD x WT

4*0.5

16*0.5

26*1.8

35*9.0

4*0.8

16*0.8

26*2.0

35*10

4*1.0

16*1.0

26*2.2

38*0.5

4*1.2

16*1.2

26*2.5

38*0.8

5*0.5

16*1.5

26*2.8

38*1.0

5*0.8

16*1.8

26*3.0

38*1.2

48*5.0

70*2.8

90*10

130*14

48*5.5

70*3.0

90*12

130*16

48*6.0

70*3.5

90*14

130*18

48*7.0

70*4.0

90*16

140*2.5

48*8.0

70*4.5

95*2.0

140*2.8

48*9.0

70*5.0

95*2.2

140*3.0

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

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.

GB/T 8162-2008 Seamless Steel Tubes For Structural Purposes

GB/T 8163-2008 Seamless Steel Tubes For Liquid Service

ASTM A53  It is used for conveying water,petrolem,gas and other common fluids.

ASTM A106 For the purpose of the pipeline project of boiler,water&petroleum.

API SPCE 5L For the purpose of transportation of gas,water,oill in oil&gas industry.

API SPEC 5CT Tubing is used in extracting petroleum & natural gas. casing pipe serves as wall of well.

ASTM A519 Seamless carbon and alloy steel mechanical tubing

A 179/A179M cold drawn low carbon steel heat exchanger and condenser tubes

ASTM A192/A192M for manufacturer wall panel,economizer,reheater,super heater,and the steam pipeline of boilers

DIN 1629 applies to seamless circulal tubes and pipes made of unalloyed steels

DIN17175 Cold Drawn Seamless Tube For Boiler And Heat Exchanger

DIN2391 Cold drawn or cold rolled precision seamless steel tubes for hydraulic pressure