En 10297-1 E355 St52 Sr H8 Honed Tube for Hydraulic Cylinder

• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Oiled
• Usage: Hydraulic/Automobile Pipe
• Section Shape: Round
• Model NO.: EYHT
• Thickness: 0.1 - 200 mm
• Length: 2-12m
• Delivery Condition: Bk, Bk+S, Gbk, Nbk
• Roughness: 0.2-0.4 U
• Straightness: ≤ 0.5/1000
• Transport Package: Export Standard Packing
• Specification: 5 - 500 mm
• Trademark: Kingmetal
• Origin: China (Mainland)
• HS Code: 7304399000
• Production Capacity: 5000 Ton/ Month

Product Description

Standard	DIN2391, DIN2445, EN10305, GB/T 3639, GB 8713,DIN17175, EN 10297-1,etc.
Grade	ST35(E235), ST37, ST24(E255), ST52(E355), 10#, 20#, 35#, 45#, CK45, 4140, 16Mn, 42CrMo, E355, Q345B, Q345D, Stainless Steel 304/316, Duplex 2205,etc.
Tolerance	H7, H8, H9,etc.
Application	1.Hydraulic cylinder 2.Pneumatic cylinder 3.Precise machine pipes 4.Agriculture machine 5.Boiler construction 6.Machinery :Stamping machine / Punching machine /Blow molding machine Plastic injection machine / Food machine ,Forklift 7.Automobiles: Crane / Truck / Truck lifter / Shock absorber of car, motorcycle, bicycle 8.Furniture: gas spring 9.Sport equipments 10.Medical equipments 11.Door closer 12.Jack
Surface Treatment	Polished , cold drawn , cold rolled, honed, anneal, Srb , od polished
Test	Tensile Test, Hydraulic Test, Eddy Current Test etc
Condirion of Delivery	1. NBK(+N) after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium 2. GBK(+A) after cold forming, annealing in non oxidizing medium protective gas 3. BK(+C) the final heat treatment after cold forming, threfore small steel pipe plasticly, the plasticly degree does not guarantee 4. BKW(+LC) after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring) 5. BKS(+SR) have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing again

Delivery Condition	Cold Finished (Hard) (BK)		Cold Drawn and Stress-Relieved (BK+S)			Hardness HB
Parameters	T.S. Rm N/mm2	Elongation A5%	T.S. Rm N/mm2	Y.S. ReH N/mm2	Elongation A5%
20# (A106)	≥550	≥8	≥520	≥470	≥12	175
45# (CK45)	≥650	≥5	≥600	≥520	≥12	207
16Mn (ST52,E355)	≥640	≥5	≥600	≥520	≥15	190
25Mn	≥640	≥5	≥600	≥510	≥15	195
27SiMn	≥840	≥5	≥800	≥720	≥10	230

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