DIN 2391 St52 Hydraulic Seamless Honed Cylinder Tube

Model NO.: HTSP Technique: Cold Drawn Surface Treatment: Oiled Section Shape: Round Wt Tolerance: -5%/+5% Specification: 6-68MM HS Code: 7304391000 Type: Seamless Material: Carbon Steel Usage: Hydraulic/Automobile Pipe, Machinery Industry Steel Grade: St52; Ck20; Ck45; E355 Trademark: HTSP Origin: China Product DescriptionOuter diameter: 25mm -500mm  Wall thickness: 2-50mm Material: ST52, Q345B, CK20, CK45, SAE1026 Standard: GB/T8713-88, GB/T3639-2009, DIN2391, EN10305
Honed tubes 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.

Material & Chemical Composition
 DIN2391 standard ST52, EN10305 standard E355, 16Mn, ASTM A106B, C20/20#, CK45
 

Material	C	Si	Mn	S(≤)	P(≤)	Cr	Ni	Mo	other
A106B / C20#	0.17-0.23	0.17-0.37	0.35-0.65	0.035	0.035	≤0.25	≤0.30		Cu≤0.25
CK45#	0.42-0.50	0.17-0.37	0.50-0.80	0.035	0.035	≤0.25	≤0.30		Cu≤0.25
Q345B	≤0.20	≤0.55	1.00-1.60	0.040	0.040	V:0.02-0.15	Nb:0.015-0.06	Ti:0.02-0.20	Alt≥0.015
ST52 E355 16Mn	≤0.20	≤0.55	1.00-1.60	0.045	0.045	V:0.02-0.15	Nb:0.015-0.06	Ti:0.02-0.20	16Mn
25Mn	0.22-0.30	0.17-0.37	0.70-1.00	0.035	0.035	≤0.25	≤0.25
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	0.030	0.030
42CrMo	0.38-0.45	0.17-0.37	0.50-0.80	0.025	0.025	0.90-1.20		0.15-0.25

Dimension tolerance

Inner Dia (mm)	ID Tolerance (mm)					WT Tolerance (mm)
	H7	H8	H9	H10	H11
30	+0.021/0	+0.038/0	+0.052/0	+0.084/0	+0.130/0	±5-10%
>30-50	+0.025/0	+0.039/0	+0.062/0	+0.100/0	+0.160/0
>50-80	+0.030/0	+0.046/0	+0.074/0	+0.120/0	+0.190/0
>80-120	+0.035/0	+0.054/0	+0.087/0	+0.140/0	+0.220/0
>120-180	+0.040/0	+0.063/0	+0.100/0	+0.160/0	+0.250/0
>180-250	+0.046/0	+0.072/0	+0.115/0	+0.185/0	+0.290/0
>250-315	+0.052/0	+0.081/0	+0.130/0	+0.210/0	+0.320/0
>315-400	+0.057/0	+0.089/0	+0.140/0	+0.230/0	+0.360/0

Product description

Processing Form	I. D	Length	Straightness	I. D Tolerance	I. D Rounghness
Cold-rolled	30-100	≤ 12M	0.3-1.0	H8-H10	0.4-1.6
Cold-drawn	30-250	≤ 12M	0.3-1.0		0.8-1.6
Hone	40-500	≤ 12M	1000	H8-H9	0.4-0.8
SRB	40-400	≤ 7M	1000	H8-H9	0.1-0.4

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Product Categories : Cylinder Tube