Specifications

St52 honed tube for hydraulic jack cylinder
Quality confirming to International Standards
Material Test Certificates for Qual

St52 honed tube for hydraulic jack cylinder

We can supply high precise hydraulic cylinder tubes.The details are as below:

1.Product name:  Din2391 st52 honed steel tube for hydraulic cylinder 2.Standard:DIN2391,EN10305

3.Material:20#,45#,16Mn,ST45,ST52

4.Delivery Condition:NBK(+N)GBK(+A)BK(+C)BKW(+LC)BKS(+SR)

5.Usage: mainly used for hydraulic pressure and pneumatic services, auto pipe, oil cylinder pipe, motorcycle shock reducer steel pipes and auto shock reducer inner  cylinder

6.

Delivery  condition	cold finished(hard)(BK)		Cold drawn and stress-relieved(BK+S)
Steel grade	Rm MPa	Elongation A5(%)	Rm MPa	ReH MPa	Elonggation A5(%)
20#	≥550	≥8	≥520	≥375	≥15
45#	≥640	≥5	≥600	≥520	≥10
16Mn	≥640	≥5	≥600	≥520	≥14
27SiMn	≥840	≥5	≥800	≥720	≥10
ST45	≥550	≥5	≥520	≥375	≥15
ST52	≥640	≥5	≥600	≥520	≥14
SAE1026	≥640	≥5	≥600	≥510	≥12

 

 

7.Tolerance

 

Size of inside Diameter(mm)	ID Tolerance			Tolerance of wall thickness
30	+0.0330	+0.0520	+0.0840	<120mm(OD)              ±5% >120mm up to 210mm±7.5% >210mm                     ±10%
>30-50	+0.0390	+0.0620	+0.1000
>50-80	+0.0460	+0.0740	+0.1200
>80-120	+0.0540	+0.0870	+0.1400
>120-180	+0.0630	+0.1000	+0.1600
>180-250	+0.0720	+0.1150	+0.1850
>250-315	+0.0810	+0.1300	+0.2100
>315-400	+0.0890	+0.1400	+0.2300

 

8. Size range:

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	0.4-1.6μm
Cold drawn	30-250	≤12M		H8-H10	0.8-1.6μm
Hone	40-500	≤12M		H8-H9	0.4-0.8μm
SRB

9.  Packing: packing in bundles or according to the clients' needs

Any need, please Feel free to contact us!