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SK RB/Honed hydraulic cylinder cold drawn tube
1.Grade:20#,45#,Q345D,STKM13C-T(25Mn)
2.OD:30mm-250mm Hydraulic cylinder Cold Drawn honed tube
3.Technique:Cold drawn honed tubes
4.Suitable for hydraulic cylinder tubes,honing or skiving and roller burnishing cylinder tubes
Dimensions tolerance
Grade |
OD(mm) |
ID (mm) |
Tolerance |
||||
OD (mm) |
ID (mm) |
Wall thickness deviation (mm) |
Ovality (mm) |
Curvature(mm/m) |
|||
45# |
40-74 |
30-65 |
±.01 |
-0.3,-0.5 |
≤0.5 |
≤0.1 |
0.3 |
74-98 |
65-85 |
±.01 |
-0.4,-0.6 |
≤0.5 |
≤0.15 |
0.3 |
|
100-116 |
85-100 |
±.02 |
-0.4,-0.6 |
≤0.6 |
≤0.15 |
0.3 |
|
124-134 |
110-115 |
±.02 |
-0.6,-0.8 |
≤0.6 |
≤0.20 |
0.3 |
|
140-158 |
120-135 |
±.02 |
-0.7,-0.9 |
≤0.8 |
≤0.20 |
0.3 |
|
165-176 |
140-150 |
±.02 |
-0.7,-0.9 |
≤0.8 |
≤0.20 |
0.3 |
|
188-203 |
160-180 |
±.02 |
-0.7,-0.9 Honed |
≤0.8 |
≤0.20 |
0.3 |
|
Mechanical properties
- Tensile strength:≥600Mpa
- Yield strength :≥520Mpa
- Elongation :>15%
- Hardness :HRB>85
- Supply condition:BKS(+SR)
Ready to hone tube (or ready to skiving tube)
| Grade | ST 52 |
| Inside diameter | 40 to 250mm |
| Max length | 14m. |
| Straightness | 0.5 /1000 |
| Type | cold drawing |
| ***Tubes are provided according to the norm EN10305-1 | |
CHEMICAL COMPOSITION (%)
Si(Max) |
Mn(Max) |
C(Max) |
P (Max.) |
S(Max) |
0.50 |
1.6 |
0.22 |
0.025 |
0.025 |
MECHANICAL PROPERTIES
|
Tensile strength Min |
Yield Point Min |
Elongation % Min |
580N/mm2 |
420N/mm2 |
10 |
EXCENTRICITY
Outer Diameter |
Excentricity |
< =125 mm |
5 % |
> 125 mm |
7 % |
measured according to the formula:
E = (max Wt – min Wt)/( max Wt + min Wt) x 100 %
BORE OVALITY
The bore ovality is comprised in the 50 % of the inside diameter tolerances.
Marking:ID, OD
Length: unfixed length or fixed length
Package: banding with steel strips, braiding parcel at outside
Conservation: Anti rust oiled coating on the inside and outside of the surface, plastic caps at both ends
Main Production Progress:
| Raw material | → | Cold drawn | → |
Heat treatment BK+S |
→ | Honed & SRB | → | Packing |
Finished products.
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