H7/H8 Inside Honing Roller Burnishing Cold Drawn Seamless Cylinder Steel Pipe

• Customization: Available
• After-sales Service: One Year
• Warranty: One Year
• Model NO.: IRH
• Type: Seamless
• Technique: Cold Drawn and Honing
• Material: Alloy, Carbon Steel
• Surface Treatment: Bare Pipe
• Usage: Boiler Pipe, Hydraulic/Automobile Pipe, Machinery Industry, Chemical Industry, Special Purpose
• Section Shape: Round
• Size: 30mm~416mm
• Length: Fixed Length, by Random
• End Processing: Plain Ends
• Surface: Bare Pipe, Anti-Rust Painting
• Steel Material: St52, Q345b, 27simn, 15CrMo, 40cr, etc
• Transport Package: Standard Seaworthy Packing
• Specification: ASTM, DIN, GB/T
• Trademark: Iron&steel
• Origin: China
• HS Code: 73045910
• Production Capacity: 2000tons Per Month

Product Description

Inside Honing Roller Burnishing steel Pipe is a kind of smooth bore steel tube which is used to manufacture hydraulic cylinder barrels that is the core part of  cylinder unit.

Size range: 40mm*30mm-580mm*500mm

Available steel grade:

SAE/AISI:	SAE1020, SAE1026, SAE1045, SAE4130, SAE4140
DIN:	ST52, ST52.3, ST52.4
EN:	E355, C45E, 25CrMo4, 42CrMo4, CK45, S45C, E410, E470
GB:	20#, 45#, 16Mn, Q345B, Q345C, Q345D, Q345E, 25Mn, 27SiMn,

Manufacture method: Cold rolled, hydraulic cold drawn, hot rolled+deep hole boring

Delivery condition:

BK	BKW	BKS	GBK	NBK	Q+T
+C	+LC	+SR	+A	+N
Cold rolled	Cold drawn	Stress relieved	Annealed	Normalized	Quenched+Tempered

Bore treatment: Honing, skiving&roller burnishing

Bore roughness control: Ra0.25um max or Ra0, 35um max for honed tubes, Ra0.25um max for skived&roller burnished tubes.

End finish: Plain ends with square cuts, free of burrs for honed tubes. Little bevelled ends for skived&roller burnished tubes.

Standard export packing: In bundles tied with steel strips. Int&ext oil coating. End plastic caps. External packing by PVC bags and knit bags.

Customized packing and marking can be provided upon request.

H8 tolerance:

ID range	Tolerance	ID range	Tolerance
18< d ≤30	+0/+0.033	180< d ≤250	+0/+0.072
30< d ≤50	+0/+0.039	250< d ≤300	+0/+0.081
50< d ≤80	+0/+0.046	300< d ≤315	+0/+0.081
80< d ≤120	+0/+0.054	315< d ≤400	+0/+0.089
120< d ≤180	+0/+0.063	400< d ≤500	+0/+0.097

Difference between honed tube and skived&roller burnished tube: In hydraulic cylinder industry, there are 2 solutions for bore treatment: Honing, and skiving&roller burnishing. Honing or skiving&roller burnishing leads to different internal surface image, but both ensure good roughness.

Specifications of major steel material:

Processing form	I.D.mm	Length	Straightness	I.D.tolerance	I.D.Roughness(RA)
Cold-rolled	30-100	≤12M	0.3-1.0/1000	H8-H10	0.4-1.6um
Cold-drawn	30-250	≤12M		H8-H10	0.8-1.6um
Hone	40-500	≤12M		H8-H9	0.4-0.8um
SRB	50-250	≤9M		H8	0.1-0.4um

Cutting length upto buyer's request, Advanced numerical control cutter guarantee the pipe ends free from burrs and curling edges.

Professional Team guarantee the top quality of seaworthy packing and shipment works

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