Professional manufacturer of Hard chrome rod for hydraulic, founded in 2004, major in honed tube, hydraulic tube, chrome rod, chrome bar, chrome shaft, at present we are biggest manufacturer and wholesaler in north of China.
Honed Tube For Hydraulic Cylinder
Longyue hydraulic Machinery, a professional manufacturer specialized in hydraulic and pneumatic products.
We provide Design, Produce, Machining and Service since 2004.
Specefication
Standard: DIN2391, EN 10305, JIS G3445, ASTM A519, GB/T 8713…
Material: ST45, ST52, E355, E355SR, STKM13C, SAE 1026, 20#, Q235B, CK45…
Heat treatment: BK+S
Specification: Out diameter: 20-800mm, Inner diameter: 40-250mm
I.D Tolerance: H7-H8
Length: 3-13m (Customers usually choose the 4-5.8m)
Straightness: 1/1000
ID roughness: RA 0.8-1.6 micron (max)
Technology: Cold drawn
Scope: Honed tube for hydraulic cylinder, swivel crane, injection machine and construction machine application
Chemical Composition
Chemical Composition (%) | ||||||
Steel Grade |
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 |
SAE 1026 |
0.22-0.28 |
0.15-0.35 |
0.60-0.90 |
0.040 |
0.050 |
/ |
27 SiMn |
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 |
Mechanical Properties
Delivery Condition |
Cold drawn + stress-relieved (BK+S) (SR) |
Cold fished (hard) (BK) |
|||
Steel Grade |
Tensile strength (Rm Mpa) |
Yield strength |
Elogation A5% |
Tensile strength (Rm Mpa) |
Elogation A5% |
20# |
≥520 |
≥375 |
≥15 |
≥550 |
≥8 |
45# |
≥600 |
≥520 |
≥10 |
≥640 |
≥5 |
E355(Q345B, St52) |
≥600 |
≥520 |
≥14 |
≥640 |
≥5 |
25Mn |
≥600 |
≥510 |
≥15 |
≥640 |
≥5 |
27SiMn |
≥760 |
≥610 |
≥10 |
≥800 |
≥5 |
Tolerance
Inner diameter |
Inner diameter tolerance |
|
H8 |
H9 |
|
30 |
+0.033 |
+0.052 |
>30-50 |
+0.039 |
+0.062 0 |
>50-80 |
+0.046 |
+0.074 |
>80-120 |
+0.054 |
+0.087 |
>120-180 |
+0.063 |
+0.100 |
>180-250 |
+0.072 |
+0.115 |
>250-315 |
+0.081 |
+0.130 |
>315-400 |
+0.089 |
+0.140 |
Product Processing
Production EQUIPMENT
Packaging & Shipping
Company Information
Qingzhou Longyue Hydraulic Machine Co.,Ltd was established in 2001, with more than 10 years import and export experences. Qingzhou Longyue Machine has been an influential exporter in the global metal products market. More than 160 customers from 26 countries and regions have established long-term business relationships with us.
Our main business range is listed as follows:
Carbon Seamless Steel pipe/tube
Hydraulic cylinder tube (Honed tube)
Hard chrome plated rod/bar/shaft (Piston rod)
We sincerely welcome friends from all over the world contact us to establish mutually beneficial business relationships.
http://www.lyhonedtube.com/