Jiangsu New Heyi Machinery Co., Ltd
| Payment Terms | L/C, T/T |
| Supply Ability | 30tons a day |
| Delivery Time | 30days |
| Packaging Details | Anti rust oil to be applied on material and each rod to be packed in paper sleeve |
| Delivery status | Stress Relieving Annealed |
| Product name | Telescopic cylinder tube |
| Material | Steel |
| Surface treatment | Chrome Plating |
| Chrome thickness | 20-30 micron |
| OD tolerance | ISO f7 |
| Brand Name | HY |
| Certification | ISO9001:2008 |
| Place of Origin | China |
View Detail Information
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 30tons a day |
| Delivery Time | 30days | Packaging Details | Anti rust oil to be applied on material and each rod to be packed in paper sleeve |
| Delivery status | Stress Relieving Annealed | Product name | Telescopic cylinder tube |
| Material | Steel | Surface treatment | Chrome Plating |
| Chrome thickness | 20-30 micron | OD tolerance | ISO f7 |
| Brand Name | HY | Certification | ISO9001:2008 |
| Place of Origin | China | ||
| High Light | 30 micron Piston Honed Tube ，20 micron honed tubes ，Telescopic Cylinder Tube | ||
20 micron - 30 micron Piston Honed Tube , Telescopic Cylinder Tube
Detailed Product Description
Telescopic Cylinder Tube and Piston Tube
Our precision seamless tubes are suitable for the manufacture of pistons, telescopic cylinder. We can
supply hard chrome plating for the telescopic cylinder tube as well, and the technical delivery conditions
refer to the next page. A comparison of tubular piston rods versus solid piston rods of the same diameter
based on identical compressive, bending and torsional stresses show that the annular cross section
permits appreciable weight saving. By cold drawing, the tube piston rods have the decisive advantage of
more higher mechanical properties than the hot finished piston rods.
Chemical Composition
| Grade | C | Si | Mn | P | S | Cu | Ni | Cr | Mo |
| CK20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.20 | / |
| CK45 | 0.42-0.50 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.20 | / |
| ST52(16Mn) | ≤0.20 | ≤0.55 | 1.00-1.60 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.20 | / |
| 42CrMo4 | 0.38-0.45 | 0.15-0.40 | 0.60-0.90 | ≤0.035 | ≤0.035 | / | / | 0.90-1.20 | ≤0.25 |
Mechanical property
| Grade | Tensile Strength(MPa) | Yield strength(MPa) | Elongation % | Remark |
| CK20 | ≥580 | ≥480 | 15 | CDS+KS |
| CK45 | ≥620 | ≥520 | 15 | CDS+KS |
| ST52(16Mn) | ≥580 | ≥520 | 16 | CDS+KS |
| 42CrMo4 | ≥980 | ≥850 | 14 | I.H.+Q.T. |
CDS: Cold Drawn Seamless
BKS: Stress Relieved Annealed
I.H.+Q.T.: Induction Hardened + Quench and tempered
Telescopic Cylinder Tube OD Chrome Plated Requirements:
| Chrome Thickness | 20-30 micron |
| Surface Roughness | Ra≤0.2 micron and Rt≤2 micro |
| OD Tolerance | ISO f7 on the diameter |
| Ovality | Half of the tolerance ISO f7 |
| Straightness | ≤0.2mm/m |
| Surface Hardness | 850-1150HV (vickers) |
| Cohesion | No cracks,breaking or detaching after thermic shock (warming up at 300 celius degrees and coolng in water) |
| Porosity | Tested according to ISO 1456/1458 and result according to ISO4540 rating 8-10 |
| Salt Spray Test | Test in natural salt spray according to ISO 9227/AST M B117 96 hours and result evaluation according to ISO4540 rating 8-10 |
Tolerance on ID
| ID mm | Values of tolerances are in microns | |||
| H7 | H8 | H9 | H10 | |
| 30 | +21 | +33 | +52 | +84 |
| >30-50 | +25 | +39 | +62 | +100 |
| >50-80 | +30 | +46 | +74 | +120 |
| >80-120 | +35 | +54 | +87 | +140 |
Company Details
Business Type:
Manufacturer
Year Established:
1999
Total Annual:
10 Million-11 Million
Employee Number:
200~300
Ecer Certification：
Verified Supplier
Jiangsu New Heyi Machinery Co., Ltd is specialized in producing precision long small diameter axes and hydraulic piston rod. The products are widely used in mine machinery industry, textile and&... Jiangsu New Heyi Machinery Co., Ltd is specialized in producing precision long small diameter axes and hydraulic piston rod. The products are widely used in mine machinery industry, textile and&...
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