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Position：Home > Products >High precision cold drawn steel pipes for hydraulic cylinders and cylinders

High precision cold drawn steel pipes for hydraulic cylinders and cylinders

SIZE
Cylindertube ID: φ40-400mm
Thickness: ≥5mm

MATERIAL
20#, 45#, Q355B, Q355D, Q355E, 25Mn, 27SiMn, E355, E470, P460, P620, 1026

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

HYDRAULIC AND PNEUMATIC CYLINDER TUBE STANDARD / SIZE / TOLERANCE

Working Method	Tube φ(mm)	Length (m)	Straightness (mm/m)	Tolerance on ID	Tolerance on WT	ID Roughness (μm)
Cold drawing	40-400	≤12m	0.2-0.5		±5%	≤1.6
Cold rolling	40-150	≤12m	0.2-0.5		±5%	≤0.8
Cold drawing honing	40-400	≤8m	0.2-0.3	H8-H9	±5%	≤0.4
Cold drawing rolling	50-300	≤8m	0.2-0.3	H8-H9	±5%	≤0.2
Deep hole boring honing	250-400	≤8m	0.2-0.3	H8-H9	±8%	≤0.8
Deep hole boring rolling	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 σ bN/mm²	Elongation δ 5%	T.S σ bN/mm²	Y.S σ bN/mm²	Elongation δ 5%	Hardness HB	Impact value (-20C)J
20	≥550	≥8	≥520	≥400	≥15	170	/
45	≥680	≥5	≥630	≥520	≥12	190	/
Q355B	≥660	≥8	≥620	≥520	≥15	190	/
Q355D	≥660	≥8	≥620	≥520	≥15	190	≥27
Q355E	≥660	≥8	≥620	≥520	≥15	≥190	≥27
25Mn	≥640	≥8	≥620	≥510	≥15	190	/
27SiMn	≥780	≥5	≥700	≥580	≥10	220	/
E355	≥700	≥8	≥650	≥580	≥15	195	≥27
1026	≥640	≥8	≥620	≥510	≥15	≥190	/
E470	/	/	≥710	≥590	≥15	/	/
P460	/	/	≥710	≥590	≥15	≥190	≥27
P620	/	/	≥730	≥630	≥15	≥220	≥27

CHEMICAL COMPOSITION

Steel Grade	C	Si	Mn	P	S	Cr	Ni	Cu	V	Al
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	1	/
Q355B	≤0.20	≤0.50	≤1.70	≤0.035	≤0.035	≤0.30	≤0.50	≤0.30	1	/
Q355D	≤0.18	≤0.50	≤1.70	≤0.030	≤0.025	≤0.30	≤0.50	≤0.30	≤0.15	≥0.015
Q355E	0.12-0.18	0.2-0.5	1.2-1.7	≤0.025	≤0.025	≤0.30	≤0.50	≤0.20	0.04-0.15	≥0.02
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	≤0.55	≤1.60	≤0.025	≤0.025	/	/	/	/	≥0.02
1026	0.22-0.28	≤0.3	0.6-0.9	≤0.035	≤0.025	≤0.20	≤0.30	≤0.35	/	/
E470	0.16-0.22	0.10-0.50	1.30-1.70	≤0.030	≤0.035	/	/	/	0.08-0.15	/
P460	≤0.2	≤0.6	1.0-1.7	≤0.025	≤0.015	≤0.30	≤0.80	≤0.70	≤0.20	≥0.02
P620	≤0.2	≤0.6	1.0-1.7	≤0.025	≤0.015	≤0.30	≤0.80	≤0.30	≤0.20	≥0.02

(TOLERANCE ON ID)μm

ID (mm)	COLD FINISHED (HARD)(BK)
ID (mm)	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

PNEUMATIC CYLINDER TUBE

Unit Weigh kg/m	ID mm	OD mm	Thickness mm
11.71	90	100	5
12.95	100	110	5
16.03	125	135	5
21.60	140	152	6
19.11	150	160	5
20.34	160	170	5
24.56	160	172	8
32.28	180	194	7
35.73	200	213	7
41.03	200	216	8
49.08	200	219	9.5
50.90	250	266	8
74.16	250	273	11.5
76.45	300	320	10
81.38	320	340	10
132.40	400	420	13

HYDRAULIC CYLINDER TUBE

Unit Weigh (kg/m)	ID (mm)	OD (mm)	Thickness (mm)
6.78	50	60	5
9.06	50	63	6.5
10.63	50	65	7.5
14.80	50	70	10
7.52	56	66	5
8.01	60	70	5
10.66	60	73	6.5
17.26	60	80	10
11.14	63	76	6.5
14.99	63	80	8.5
18.00	63	83	10
8.63	65	75	5
13.41	65	80	7.5
9.25	70	80	5
12.26	70	83	6.5
15.39	70	86	8
19.73	70	90	10
15.26	75	90	7.5
20.96	75	95	10
13.87	80	93	6.5
16.18	80	95	7.5
22.19	80	100	10
24.68	80	102	11
32.45	80	108	14
14.67	85	98	6.5
17.11	85	100	7.5
23.43	85	105	10
14.20	90	102	6

Unit Weigh (kg/m)	ID (mm)	OD (mm)	Thickness (mm)
18.03	90	105	7.5
21.97	90	108	9
24.66	90	110	10
30.18	90	114	12
19.88	90	115	7.5
24.19	100	118	9
28.61	100	121	10.5
37.79	100	127	13.5
24.84	100	127	8.5
29.59	110	130	10
34.46	110	133	11.5
46.24	110	140	15
24.27	110	131	8
30.83	115	135	10
35.87	115	138	11.5
39.30	115	140	12.5
23.58	115	135	7.5
32.06	120	140	10
35.54	120	142	11
42.64	120	146	13
24.51	125	140	7.5
35.09	125	146	10.5
38.71	125	148	11.5
42.38	125	150	12.5
46.11	125	152	13.5
53.70	125	156	15.5
59.53	125	159	17
38.25	130	152	11

Unit Weigh (kg/m)	ID (mm)	OD (mm)	Thickness (mm)
45.84	130	156	13
53.64	130	160	15
45.47	135	160	12.5
36.99	140	160	10
42.96	140	163	11.5
49.05	140	166	13
53.17	140	168	14
74.50	140	178	19
35.29	150	168	9
39.46	150	170	10
50.09	150	175	12.5
61.03	150	180	15
41.92	160	180	10
50.09	160	184	12
60.07	160	188	14
64.73	160	190	15
74.20	160	194	17
75.88	170	203	16.5
43.22	175	194	9.5

Unit Weigh (kg/m)	ID (mm)	OD (mm)	Thickness (mm)
46.85	180	200	10
54.31	180	203	11.5
72.13	180	210	15
82.59	180	214	17
95.93	180	219	19.5
65.50	200	225	12.5
79.53	200	230	15
93.86	200	235	17.5
123.45	200	245	22.5
86.93	220	250	15
161.09	220	273	26.5
98.02	250	280	15
165.84	250	299	24.5
167.84	280	325	22.5
276.20	280	351	35.5
204.68	300	351	25.5
321.38	300	377	38.5
128.24	320	351	15.5
244.93	320	377	28.5

INCHIN SIZE OF TUBE

internal diameter(ID) (unit: inch)
1 1/2”	2”	21/2"	3”	3 1/2”	4”	5”	6”

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