BKS Finished Cylinder Tube Hydraulic Cylinder Honed Tube

Product Overview

Description

BKS Finished  Cylinder Tube Hydraulic Cylinder Honed Tube

 1.Specifications

Material: 20# 45# 16Mn 27SiMn ST52

Standard: GB/T87138-88 GB/T3636-2000 DIN2391 EN10305

Straightness: 0.3--0.8mm/m

2.Chemical Composition(%)

Grade	C(max)	Si(max)	Mn	P	S(max)
ST35	0.17	0.35	>=0.40	0.025	0.025
ST42	0.21	0.35	>=0.40	0.025	0.025
ST52	0.22	0.55	<=1.60	0.025	0.025

 

3.Mechanical Properties

Steel	Tensile strength	Yield	Elongation	Hardness HB
20#	530	505	12	175
45#	660	630	9	190
16Mn	595	575	9	190
27SiMn	840	805	7.5	230

 

4.Product description 

Processing form	I.D	Length	Straightness	I.D Tolerance	I.D Rounghness
Cold-rolled	20-100	<=10m	0.3-1.0	H7-H9	0.4-1.6
Cold-drawn	76-245	<=12m	0.3-1.0	H7-H9	0.8-1.6
Honed	40-180	<=7m	1000	H7-H9	0.4-0.8
SRB	63-180	<=7m	1000	H7-H8	0.1-0.4