Stkm13A St52 SAE1020 Seamless Hydrolic Cylinde Tube

• Temperature Classification: High Temperature Piping
• MPa Classfication: High Pressure Piping
• Material: Alloy Steel
• Standard: ASTM, API, DIN, JIS
• Diameter: 10~300mm
• Medium: Liquid
• Model NO.: KM-170281
• Cross-Section Shape: Round
• Connection Type: Seamless
• Name: Hydrolic Cylinder Tube
• Processing Method: Cold Drawning, Hot Rolling
• Size: 10mm~300mm
• Thickness: 1mm~20mm
• Materials: Stkm13A,B,C, DIN St52, SAE1020,etc
• Standards: Jisg3441,Jisg3444,ASTM A519,En10305,DIN2391
• Transport Package: in Bundles
• Specification: 10mm~300mm
• Trademark: KINGMETAL
• Origin: China
• HS Code: 73045110
• Production Capacity: 10000tons/Year

Product Description

Seamless Hydrolic Cylinde Tube

1.Internal Diameter Accuracy : H7, H8, H9
2.Internal Roughness : Ra 0.2μm ~ Ra 0.8μm
3.Straightness : 1-1.2/1000mm
4.Standard Length : 3M~11M
5.Special Length : 12M
6.Diameter : 18Ø~ 300Ø
7.Thickness: 1mm~20mm
7.Material : JIS STKM13A,B,C, DIN ST52, SAE1020,etc
8. Manufacture process: Cold-drawn
9. Delivery condition: See table attached
10. Marking, surface anti-rust protection, end-protection methods to be confirmed.
11. Packing: To be confirmed. Our standard packing will be hexagonal bundle packing tied with steel strips.
12. Tubes with specif requirements about sizes&size tolerance, mechanical properties, surface roughness can be negotiated for production&supply.
13. Delivery condition:BK,BKW,BKS,GBK,NBK

Some common standard and materials:

DIN2391-2	ST52, ST52.3, ST52.4
ASTM A519	SAE1020, SAE1026, SAE1045, SAE1541, SAE4130, SAE4140, SAE4145, SAE4340
EN10305-1	E355, C45E, 25CrMo4, 42CrMo4
Other	E410, E470, 20MnV6, CK45,etc

 

STKM 13A 13B 13C  Chemical Analysis & Mechanical Properties

Kind

Mark

Manuf

Chemical Composition%

Tensile Test

Bend Test Flattening Test

C

Si

Mn

P

S

Tensile

Yield

ELOVG(%)

Bend

Inside

Outside

(N/mm²)

(N/mm²)

Test Piece

5 th

Angle

Radius

Radius

11th 12 th

Test Piece

L

V

13A

STKM13A

S

0.25>

0.35>

0.3

0.04

0.04

380

220

30

25

90

6D

2/3D

13B

STKM13B

E

|

Under

Under

450

310

20

15

90

6D

3/4D

13C

STKM13C

0.9

520

390

15

10

-

-

-

Mechanical Property for other grade:

Delivery Condition	Cold drawn+ stress-relieved(BK+S)(SR)			Cold fished (hard)(BK)
Steel Grade	Tensile strength (Rm Mpa)	Yield strength	Elogation A5%	Tensile strength (Rm Mpa)	Elogation A5%
20#	≥520	≥375	≥15	≥550	≥8
45#	≥600	≥520	≥10	≥640	≥5
E355(Q345B,St52)	≥600	≥520	≥14	≥640	≥5
25Mn	≥600	≥510	≥15	≥640	≥5
27SiMn	≥760	≥610	≥10	≥800	≥5

Heat treatment method: 
+Cc, +LCc, +SR, +Ad, +N

Note: Special steel grade is also available, according to customer request.
Please specify the steel grade and heat treatment mothod when sending the enquiry!

Applications:
for Auto industry
for machinery use
Oil Cylinder Tube
Motorcyle shock absorber 
Auto shock absorber innder cylinder
Telescopic Cylinders 

Test Methods:
Tensile test
Flattening test
Drift expanding test
Dimensional inspection
Roughness measurement
Visual examincation

Not-destructive testing
a. Test for longitudinal imperfections- 
- Eddy current test - EN10246-3, level E3
- ultrasonic testing - EN10246-7, level U3
b. Leak-tightness
- Non-destructive testing for verification of leak-tightness shall be carried out in accordance with EN10246-1