Specifications

Internal Honed with External Hard Chromium Plate Tube
1. Smooth surface 2. Dimensional accuracy 3. Excellent micro-structure un

Internal Honed with External Hard Chromium Plate Tube

 

Cylinder material C20 C45 St52 size range(I.D): 30mm~500mm ID tolerance: ISO H8 Roughness:0.4 micron Straightness: 0.8/10

 

Grade  ST 52, C20 Ck45  25Mn .27Simn

 

Size range

 

Inside diameter from 40 to 1000mm,

 

Max length 20 meters.

 

Straightness 0.5 /1000
Tolerance EXT DIN 2391
Tolerance INT ISO H8
Roughness(Ra) 0.2 to 0.4 micron

 

Type  cold drawing, normalizing treatment, honing

 

CHEMICAL COMPOSITION (%)

 

Si (Max)	Mn (Max)	C (Max)	P (Max.)	S (Max)
0.55	1.60	0.22	0.025	0.025

 

MECHANICAL PROPERTIES

 

Tensile strength Min	Yield Point Min	Elongation % Min
580 N/mm2	420 N/mm2	10

 

Marking  ID, OD

 

Length unfixed length or fixed length

 

Package  banding with steel strips, braiding parcel at outside

 

Conservation  Anti rust oiled coating on the inside and outside of the surface, plastic caps at both ends.

 

Impact test  -20°C, 27 J (only for special requirement)