Specifications

ld drawing seamless steel pipe Advance tehnology
2.Top quality
3.Golden supplier
4.OEM Acceptable
5.MOQ:20MT

cold drawing seamless steel pipe Advance tehnology

1.Standard:DIN 2391 EN10305
2.Material:St52 ST52.3 E355
3.Delivery condition:NBK BKS
4.ID tolerance:H8-H9

 We supply  DIN2391 ST52 High precision cold drawn honed tubes with excellent quality and competitive price.

1.Variety

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

2. Material Specification and Ref. Document  

ST52,BK+S OR NBK,DIN2391 

OD:36-480mm WT:3-40mm

3. Chemical Compisition (%)

Steel grade	Chemical composition,%
	C	Si	Mn	P	S	Cr
				≤
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

4. 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

5. Supply Condition

  Cold drawn seamless steel tube, stress relieved and honed or skived roller burnished

6. Surface Roughness

 Ra = 0.4~0.8 Micron

7. Tolerances of Inner Dia.

Size of I.D	I.D Tolerance			Tolerance of wall thickness
	H8	H9	H10	±7.5% >210mm ±10%
30	+0.0330	+0.0520	+0.0840
>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

8. Tolerance on Outer Dia. 

 ≤ Dia 40   +/-0.2 mm

 ≥ Dia 40 ≤ Dia 100   +/-0.3mm

 ≥ Dia 100   +/-0.5mm

9. 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.

10. Scope

 Hydaulic cylinder tube for swivel crane, injection machine and construction machine application

 Finished products

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