Specifications

1.Best reputation honed precision steel pipe
2.High reputation
3.Golden supplier
4.OEM service
5.Top Quality

Best reputation Ms seamless honed precision steel pipe

 

1.Grade:20#,45#,Q345D,STKM13C-T(25Mn)
2.OD:30mm-250mm Hydraulic cylinder Cold Drawn honed tube Best reputation New Supplier
3.Technique:Cold drawn honed tubes

4.Suitable for hydraulic cylinder tubes,honing or skiving and roller burnishing cylinder tubes

 

Dimensions tolerance

 

Grade	OD(mm)	ID (mm)	Tolerance
			OD (mm)	ID (mm)	Wall thickness deviation (mm)	Ovality (mm)	Curvature(mm/m)
45#	40-74	30-65	±.01	-0.3,-0.5	≤0.5	≤0.1	0.3
	74-98	65-85	±.01	-0.4,-0.6	≤0.5	≤0.15	0.3
	100-116	85-100	±.02	-0.4,-0.6	≤0.6	≤0.15	0.3
	124-134	110-115	±.02	-0.6,-0.8	≤0.6	≤0.20	0.3
	140-158	120-135	±.02	-0.7,-0.9	≤0.8	≤0.20	0.3
	165-176	140-150	±.02	-0.7,-0.9	≤0.8	≤0.20	0.3
	188-203	160-180	±.02	-0.7,-0.9 Honed	≤0.8	≤0.20	0.3

 

 

Mechanical properties

 

• Tensile strength:≥600Mpa
• Yield strength :≥520Mpa
• Elongation :>15%
• Hardness :HRB>85
• Supply condition:BKS(+SR)

Ready to hone tube (or ready to skiving tube)

Grade	ST 52
Inside diameter	40 to 250mm
Max length	14m.
Straightness	0.5 /1000
Type	cold drawing
***Tubes are provided according to the norm EN10305-1

CHEMICAL COMPOSITION (%)

Si(Max)	Mn(Max)	C(Max)	P (Max.)	S(Max)
0.50	1.6	0.22	0.025	0.025

MECHANICAL PROPERTIES

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

EXCENTRICITY

Outer Diameter	Excentricity
< =125 mm	5 %
> 125 mm	7 %

measured according to the formula:

E =  (max Wt – min Wt)/( max Wt + min Wt) x 100 %

BORE OVALITY

The bore ovality is comprised in the 50 % of the inside diameter tolerances.

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  

 

 

Main Production Progress:

 

Raw material

→

Cold drawn

→

Heat treatment BK+S

→

Honed & SRB

→

Packing

 

 

 

 

 

 

 

About our service:

 

 

 

1.Cargo track service during transporting and feedback service after cargo is loaded on board

 

 

 

2.Flexible terms of payment by

 

 

 

3.Big discount for regular customers

 

 

 

4.Smooth delivering procedure

 

 

5. Payment Terms: T/T , L/C And so on.

 

 

If there are any Question, please Feel free to send us inquiry.

 

We will provide the professional Explanation.

 

 

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