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Bike Frame Using Seamless Carbon ISO9001 H8 Honed Steel Piping Tube
Feb 07, 2017

Products of seamless pipe

 

1.Seamless steel pipe

Widely used in the hydraulic cylinder of the heavy machinery, Cranes, excavator also forklifts. Material is various, mainly STKM-13CT ST52 CK45 E355 and AISI1020. We can also offer as customized seamless steel tube.

2.cold drawn steel pipe/cold rolled steel tube

Grade: 20#  45#  16Mn  25Mn Q345 27SiMn  E355  ST52 STKM11A STKM13A STKM13C

Standard: GB/T8713  GB/T3639  DIN2391  EN10305  ASTMA519

Range: 30-300mm

Length: 11m(max)

The cold process can change the thickness of tube to meet client's request and offer better mechanical property

 3. Honed steel pipe&SRB steel tube

ID Tolerance: H8  H9 or as client's request

ID Roughness: RA0.4micron(max)

Length: 6m(max)

Inner roughness: Ra0.2-0.8um

Straightness: 1:1000 or customized

This process can improve the roughness of the inner tube to 0.2-0.8um and make inside tube more smooth which can be used for cylinder directly.

4.hydraulic cylinder steel tube

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Mechanical Property

 

Delivery Condition

Cold drawn+stress-relieved(BK+S)(SR)

Cold finished(hard)(BK)

Steel Grade

Tensile strength

(Rm Mpa)

 

Yield strength

(ReH Mpa)

 

 

Elongation A5%

Tensile strength

(Rm Mpa)

 

 

Elogation A5%

 

20#

520

375

15

550

8

45#

600

520

10

640

5

16Mn(Q345B Q345D)

600

520

14

640

5

25Mn

600

510

15

640

5

27SiMn

760

610

10

800

5

St45

520

375

15

550

5

E355(St52)

600

520

14

640

5

SAE1026

600

510

15

640

5