Precision Seamless 40Cr ,12Cr1MoV Steel hydraulic cylinder Tube For Automobile Cylinder

Precision Seamless 40Cr ,12Cr1MoV ?Steel hydraulic cylinder Tube For Automobile Cylinder

Commodity: precision cylinder steel tube
Standard specification&material: DIN2391-2 ST52,ST45,EN10305-1 E355,C45E,25CrMo4,34CrMo4,42CrMo4,ASTM A519 SAE1020,SAE1026,SAE1045,SAE4130,SAE4140,etc.
Size range:40mm*30mm - 480mm*450mm
Manufacture method: cold rolled, hydraulic cold drawn
Delivery condition:?
BK?? ?BKW?? ?BKS?? ?GBK?? ?NBK
+C?? ?+LC?? ?+SR?? ?+A?? ?+N
Internal surface treatment method: honing,skiving and roller burnishing
OD tolerance: as per EN10305-1 or DIN2391-1
ID tolerance: H7,H8,H9,H10 or given by customer.
W.T tolerance(eccentricity): 5%
Bore roughness(Ra): 0.25um max for skived and roller burnished tube, 0.4um max for honed tube.
Chemical composition requirement of E355 material:
Element?? ?C?? ?Si?? ?Mn?? ?P?? ?S
Content (%)?? ?0.22% max?? ?0.55% max?? ?1.60% max?? ?0.025% max?? ?0.025% max
Mechanical properties of E355 tubes:
??? ?BK?? ?BKW?? ?BKS?? ?GBK?? ?NBK
Tensile strength:?? ?640 Mpa min?? ?580 Mpa min?? ?580 Mpa min?? ?450 Mpa min?? ? 490Mpa-630Mpa
Yield strength?? ?-?? ?-?? ?450 Mpa min?? ?-?? ? 355 Mpa min
Elongation?? ?4% min?? ?7% min?? ?10% min?? ?22% min?? ? 22% min

Specifications:

? ?Inner Diameter: ?30- 1000 mm

? ?Outer Diameter: ?40- 1200 mm

? ?Wall Thickness: 2.5- 55 mm

? ?Main Material: ?20#(St45), 45#(CK45), 16Mn(St52), 25Mn, 27SiMn

? ?Standard: GB/T8713-88, ISO4394/1-1980(E)

? ?(Can be customerized according to your needs.)

service:

External machining or external polishing service can be provided. ?

End machining service can be provided.

Products pictures:

Equipments:

customers visit ?factory