Specifications

1.DIN2391 ST52.3 Honed Tube H8&H9 BK+S
2.High reputation
3.Golden supplier
4.OEM
5.Top Quali

DIN2391 ST52.3 Honed Tube H8&H9 BK+S

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)

 

Delivey conditions:

 

• Standard packing with plastic caps and strapped bundes.,standard weight approx 1500kg
• Commercial length 2000~10500mm,custom lengths upon request
• Surface protection

 

Chemical composition of Material:

 

 

Steel grade	Chemical composition,%
	C	Si	Mn	P	S	Cr
				≤
20#	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.25
16Mn	≤0.2	≤0.5	1.00-1.60	0.03	0/03	0.25
ST52(E355)	≤0.22	≤0.55	≤1.6	0.025	0.025	0.25
SAE1026	0.22-0.28	0.15-0.35	0.6-0.9	0.04	0.05	/

 

Main Production Progress:

 

Raw material

→

Cold drawn

→

Heat treatment BK+S

→

Honed & SRB

→

Packing

 

 Finished products.

CNC ZTG-2560 Skiving and Roller Burnishing Machine

 

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