hydraulic cylinder tubes E355 St52.mp4

4 year ago

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Ningbo Huijie Steel Pipe Manufacturing Co.,Ltd

 5 year year

Product details

Precision Hydraulic Cylinder Steel Tube for Crane

Standard : GB/T3639, GB/T8713, EN10305-1:2002, EN10305-2:2002,
ASTM A519-2006, ASTM A513-2007, GB/T1591-2008, GB/T17396-2009

Material: 20#, 45#, Q345B, Q345D, 25Mn, 27SiMn, E355

Product Feature:

1.High precision (can cut the costs of machining) .
2.Excellent surface finish
3.Good mechanical performance (Annealing ,Bright Annealing,QT heatment on steel tubes to reach customers' Mechanical requsts. )

Hydraulic and pneumatic cylnder tube standard/size/tolerance

Working method	Tube ID (mm)	Length (m)	Straightness (mm/m)	Tolerance on ID	Tolerance on WT	ID Roughness (um)
Cold Draw	40-400	≤12m	0.2-0.5	/	±5%	≤1.6
Cold Rolled	40-150	≤12m	0.2-0.5	/	±5%	≤0.8
Cold Draw-Honed	40-400	≤8m	0.2-0.3	H8-H9	±5%	≤0.4
Cold Draw-Rolling	50-300	≤8m	0.2-0.3	H8-H9	±5%	≤0.4
Deep hole boring-Roing	250-400	≤8m	0.2-0.3	H8-H9	±8%	≤0.8
Deep hole boring-Honed Roing	250-400	≤8m	0.2-0.3	H8-H9	±8%	≤0.4

Mechancial property

Final supply condition Steel grade	Cold finished(hard)(BK)		(Cold drawn and stress-relieved(BK+S)
Final supply condition Steel grade	T.S bN/mm²	Elogation 5%	T.S bN/mm²	Y.S Bn/mm²	Elogation 5%	Hardness HB	Impact value(-20℃)J
20	≥550	≥8	≥520	≥400	≥15	170	/
45	≥680	≥5	≥630	≥520	≥12	190	/
Q345B	≥660	≥8	≥620	≥520	≥15	190	/
Q345D	≥660	≥8	≥620	≥520	≥15	190	≥27
25Mn	≥640	≥8	≥620	≥510	≥15	190	/
27SiMn	≥780	≥5	≥700	≥580	≥10	210	/
E355	≥700	≥8	≥650	≥580	≥15	195	≥27

Chemecal composition

Steel grade	C	Si	Mn	P	S	Cr	Ni	Cu	V
20	0.17-0.23	0.17-0.37	0.35-0.65	≤0.035	≤0.035	≤0.25	≤0.30	≤0.25	/
45	0.42-0.50	0.17-0.37	0.50-0.80	≤0.035	≤0.035	≤0.25	≤0.30	≤0.25	/
Q345B	≤0.20	≤0.50	≤0.17	≤0.035	≤0.035	≤0.30	≤0.50	≤0.30	≤0.15
Q345D	≤0.18	≤0.50	≤0.17	≤0.030	≤0.025	≤0.30	≤0.50	≤0.30	≤0.15
25Mn	0.24-0.32	1.10-1.40	1.10-1.40	≤0.035	≤0.035	≤0.30	≤0.30	≤0.20	/
27SiMn	0.22-0.29	0.17-0.37	0.70-1.0	≤0.035	≤0.035	≤0.25	≤0.30	≤0.25	/
E355	≤0.22	≤0.50	≤1.60	≤0.035	≤0.025	/	/	/	/

(Tolerance on ID) um

ID Size	(Tolerance on ID)um
	H7	H8	H9	H10
30	+21 0	+33 0	+52 0	+84 0
>30-50	+25 0	+39 0	+62 0	+100 0
>50-80	+30 0	+46 0	+74 0	+120 0
>80-120	+35 0	+54 0	+87 0	+140 0
>120-180	+40 0	+63 0	+100 0	+160 0
>180-250	+46 0	+72 0	+115 0	+185 0
>250-315	+52 0	+81 0	+140 0	+210 0
>315-400	+57 0	+89 0	+170 0	+230 0

100% Eddy Current Testing.
100% Size Tolerance Checking.
100% Tube surface checking to avoid surface defects.

ID Honned Steel Tube Hydraulic Cylinder Seamless Round Tube

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Ningbo Huijie Steel Pipe Manufacturing Co.,Ltd

 Audited supplier

5 year

Address: Ningbo, China

Main Product: Seamless Bearing Tubes, Mining Drill Pipes, Boiler Steel Tubes, Alloy Mechanical Tubing, Precision Steel tubes, Stainless Steel tubes

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