China St52 27simn Inner Surface Honed Seamless Steel Pipe for Hydraulic Cylinder

Product Description

High precision honing pipe can be produced according to the demands of costumers that the degree of precision can reach H8/H9. Burnishing and honing service can be provided depending on the roughness requirement of inner diameter.
The honing pipe is used for the hydraulic cylinder making.
Used as the pipes on the heated side of low and medium pressure boilers(normally with operating pressure not higher than 5.88Mpa and
operating temperature below 450 oc);as the pipes on the heated sides of high·pressure boilers,economizers,overheaters,reheaters and pipes
for petrochemical industry(with the operating pressure above 9.8Mpa and operating temperature ranging between 450~C~650~C1
St52 27simn Inner Surface Honed Seamless Steel Pipe for Hydraulic Cylinder

St52 27simn Inner Surface Honed Seamless Steel Pipe for Hydraulic Cylinder

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

Tolerance of ID and WT

Size of inside Diameter(mm)	ID Tolerance			Tolerance of wall thickness
Size of inside Diameter(mm)				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

Length and cut tolerance

Length ≤ 500mm , +2mm
> 500mm ≤ 2000mm, +3mm
> 2000mm ≤ 5000mm, +5mm
> 2000mm ≤ 7000mm, +10mm

Standard:DIN 2391,EN10305
Material: St45,St52,E355

Chemical composition

Steel grade	Chemical composition,%
	C	Si	Mn	P	S	Cr
	C	Si	Mn	≤
St45	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.250
ST52(E355)	≤0.22	≤0.55	≤1.6	0.025	0.025	0.25
SAE1026	0.22-0.28	0.15-0.35	0.60-0.90	0.040	0.050	/
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	0.035	0.035	0.300
20#	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.250

9. Mechanical Properties

Delivery condition	BK Cold finished(hard)		BKS Cold drawn and stress-relieved
Steel grade	Rm Mpa	Elongation A5(%)	Rm MPa	ReH MPa	Elonggation A5(%)
ST45	≥550	≥5	≥520	≥375	≥15
ST52(E355)	≥640	≥5	≥600	≥520	≥14
SAE1026	≥640	≥5	≥600	≥510	≥15
16Mn	≥640	≥5	≥600	≥520	≥14
20#	≥550	≥8	≥520	≥375	≥15

Tube ends

Tube ends shall be cut nominally square to the axis and free from burs

11.Delivery condition:BKS
Appearance

Tube shall have a smooth internal and external surface consistent with cold working process, tube inner surface should be free from rust, scratches and other surface
irregularities