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Hydraulic Cylinder Tube

Description

Dingxin manufactures a variety of precision cold drawn/ cold rolled seamless steel tubes and skived & roller burnished tubes for all kinds of hydraulic cylinders, covering construction machinery, agriculture machinery, mining machinery, material handling machinery, aerial working platform, lifting platform, vehicle, hydraulic jack and etc.

Advantages

Adopt quality hydraulic cylinder-standard raw material from leading mills

High precision with tight allowance

No defects on internal surface

High concentricity and small wall thickness tolerance

High straightness

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Product parameter

Size Range

Cold Drawn Tube: I.D φ 16-220mm, WT 2-32mm

Cold Rolled Tube: I.D φ 16-82mm, WT 3.2-32mm

SRB Tube: I.D φ 50-250mm, WT 3-32mm

Executive Standard

GB/T3639, Cold-drawn or cold-rolled precision seamless steel

GB/T1591, High strength low alloy structural steels

DIN2391, Seamless precision steel tubes

DIN2393, Welded Precision Steel Tubes

EN10305-1, Steel tubes for precision applications Part 1: Seamless cold drawn tubes

EN10305-2, Cold drawn steel tubes for precision applications Part 2: Welded cold drawn tubes

ASTM A519, Seamless Carbon and Alloy Steel Mechanical Tubing

ASTM A513, Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing

According to customer’s specific requirements

Customize your tube

Steel Grade

20#, 45#, 25Mn, Q355B, Q345D ； ST45, ST52 ； E255, E355 ； 1020, 1026, 1045 and etc.

Delivery Condition

Cold drawn/hard (+C) (BK)

Cold drawn and stress relieved (+SR) (BKS)

Hydraulic Cylinder Tube Size

Processing Type	ID（mm）	Length（mm）	Straightness（mm）	tolerance（mm）	Roughness（μm）
Cold Drawn	16-220	≤12	0.2-0.5/1000	As per request	0.8-1.6
Cold Rolled	16-82	≤12	0.2-0.5/1000	As per request	≤0.8
Skived and Roller Burnished	50-250	≤6	0.2-0.3/1000	H8-H9	≤0.4

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
Q355B	≤0.20	≤0.50	≤1.70	≤0.035	≤0.035	≤0.30	≤0.50	≤0.30	≤0.15
Q345D	≤0.18	≤0.50	≤1.70	≤0.030	≤0.025	≤0.30	≤0.50	≤0.30	≤0.15	≥0.015
25Mn	0.22-0.29	0.17-0.37	0.70-1.0	≤0.035	≤0.035	≤0.25	≤0.30	≤0.25
1026	0.22-0.28	0.15-0.35	0.60-0.90	≤0.040	≤0.050
ST45	≤0.21	≤0.35	≥0.4	≤0.025	≤0.025
E255	≤0.21	≤0.35	0.40-1.10	≤0.025	≤0.025
E355 (ST52)	≤0.22	≤0.55	≤1.6	≤0.025	≤0.025					≥0.02

Mechanical Properties

Delivery Condition	Cold Finished Hard (+C/ BK)		Cold Finished and Stress Relieved (+SR/ BKS)
Steel Grade	Tensile Strength (Mpa)	Elongation (%)	Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (%)	Impact Value (-20℃)
20# / 1020 / E255 / ST45	≥580	≥8	≥580	≥480	≥15	-
45# / 1045	≥680	≥5	≥630	≥520	≥12	-
Q355B	≥660	≥8	≥620	≥520	≥15	-
Q345D	≥660	≥8	≥620	≥520	≥15	≥27
25Mn (1026)	≥640	≥8	≥620	≥510	≥15	-
E355 (ST52)	≥680	≥8	≥650	≥580	≥15	≥27