we can provide such pipes:
1.Seamless steel tube and carbon steel tube
Widely used in oil,drilling, gas, Cranes, excavator also forklifts. Material is various, mainly STKM-13CT ST52 CK45 and AISI 1020. We can also offer as customized seamless steel tube.
2.precision steel tubes
cold drawn steel tube/cold rolled steel pipe
Grade: 20#45#16Mn25Mn Q345 27SiMnE355ST52 STKM13A STKM13C
Standard: GB/T8713GB/T3639DIN2391EN10305ASTMA519
Range: 30-300mm
Length: 11m(max)
The cold process can remove the oxide layer outside to improve surface and offer better mechanical property, also can change ID,OD,WT to meet every client request.
3. Honed steel tube&SRB steel pipe
ID Tolerance: H8H9 or as client's request
ID Roughness: RA0.4micron(max)
Length: 6m(max)
Inner roughness: Ra0.2-0.8um
Straightness: 1:1000 or customized
This process can improve the roughness of the inner tube to 0.2-0.8um and make tube for cylinder using directly.
4.Hydraulic cylinder steel tube
Hydraulic cylinder tube inside and outside the wall without oxidation layer, under high pressure, no leakage, high precision, high finish, cold bending deformation, flaring, flattening without cracks, surface rust proofing
1. The smaller outer diameter
2. High precision to do small batch production
3. Cold drawn finished products of high precision, good surface quality
4. The steel pipe transverse area is more complex
5. Steel pipe is superior performance, dense metal
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| Carbon Steel Tube | Cold drawn Tube |
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| Cold Drawn Steel Tube | Honed /SRB Tube |
Hydraulic pneumatic liner actuator standard/size/precise
| Processing the form | Cylinder diameter | Length | Straightness | Dimensional accuracy | Wall thickness | Inner hole roughness |
| cold drawn | 48~325 | ≤12m | 0.3~0.8mm/m | ±10% | 0.8~1.6µm | |
| honing | 48~325 | ≤10m | 0.3~0.8mm/m | H8~H9 | ±10% | 0.3~0.8µm |
| roling | 50~250 | ≤ 9m | 0.3~0.8mm/m | H7~H9 | ±10% | 0.01µm |
Mechanics performance
Material | Tensile strength | Yield strength | Elongation | Hardness |
Ck20/20#/AISI1020 | >520 N/ mm2 | >375 N/mm2 | >15% | >85HB |
Ck45/45#/AISI1045 | >600 N/ mm2 | >520 N/ mm2 | >15% | >85HB |
ST52/16Mn/Q345D | >600 N/ mm2 | >520 N/ mm2 | >15% | >85HB |
25Mn/STKM 13C-T | >600 N/ mm2 | >530 N/ mm2 | >15% | >85HB |
Dimension tolerance
ID size | ID deviation (mm) | |||
H7 | H8 | H9 | H10 | |
30 | +0.021 0 | +0.033 0 | +0.052 0 | +0.084 0 |
>30~50 | +0.025 0 | +0.039 0 | +0.062 0 | +0.100 0 |
>50~80 | +0.030 0 | +0.046 0 | +0.074 0 | +0.120 0 |
>80~120 | +0.035 0 | +0.054 0 | +0.087 0 | +0.140 0 |
>120~180 | +0.040 0
| +0.063 0 | +0.100 0 | +0.160 0 |
>180~250 | +0.046 0 | +0.072 0 | +0.115 0 | +0.185 0 |
>250~315 | +0.052 0 | +0.081 0 | +0.130 0 | +0.210 0 |
>315~400 | +0.0527 0 | +0.089 0 | +0.140 0 | +0.230 |
Material range of YANTAI XINPENG
Steel Grade | ||
DIN | 1629 | ST 37 / 44 / 52 |
| 1630 | ST 37.4 / 44.4 / 52.4 |
| 2391-2 | ST 35 / 45 / 52 |
EN | 17204 | C22 – Ck 22 – Cm22 – |
| 17210 | C15 – Ck 15 – Cm 15 – 16MnCr5 |
| 10305-1 | E215/235/355/255 |
GB | 3639 | 10#, 20#, 16Mn, 45# |
ASTM | A 519 | 1010 |
| A179-A450 | A450 |
| A822-A450 | A450 |
BS | BS 6323 | CFS3 CFS4 CFS5 CFS6 CFS7 |
NFA | 49310 | TU 37 b |
Our Company
We are professional supplier of steel tubes, cold drawn steel tube, cold rolled steel tube,
cold drawn honed steel tube, cold drawn rolled honed tube, honed tube, SRB tube, hydraulic
cylinder pipe and so on.
O
Our Workshop
Our Company is equipped with JLB250T hydraulic cold drawn machine set,LD120 precision cold rolled machine set, multiple precision straightening machine,box heat treat furnaces(8000-10000mm), advanced CNC skived and roller burnished machine SRB-6000mm, several powerful honed machine, combined cold drawn, cold rolling, heat treatment, and SRB process to produce the best quality products.
1.Used In Hydraulic Cylinder for excavator, Forklift, Heavy Truck.
2. Safe Product as elevator Buffer.
3. All kind of machinery,as ubber machinery, forging machinery, casting machinery, engineering machinery.
4. High pressure steel pipe concrete pump, sanitation vehicle, automobile industry, shipbuilding industry.
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