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- Refund if your item is not delivered or as described
- Buyer Protection after order confirmation
- Place of Origin: china
- Brand Name: longyue
- Model Number: LYY01
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Product discription
Cylinder ID: 40-400mm
Wall thickness: 3-50mm
Material: 20# 45#(CK45) 16Mn(ST52) 25Mn 27SiMn
Standard: GB/T 8713-88 GB/T3639-2000 DIN2391 EN10305
Honed tubes can be produced according to the demands of costumers that the degree precision can reach H8-H9. Burnising and rollering service can be provided depending on the roughness requirement of inner diameter.
Mechanical Properties
| Steel Grade | Tensile strength δbN/mm2 | Yield strength δsN/mm2 | Elongation δ% | Hardness HB |
| 20# | ≥520 | ≥470 | ≥12 | 175 |
| 45#(CK45) | ≥600 | ≥520 | ≥12 | 207 |
| 16Mn(ST52) | ≥600 | ≥520 | ≥15 | 190 |
| 25Mn | ≥600 | ≥510 | ≥15 | 195 |
| 27SiMn | ≥800 | ≥720 | ≥10 | 230 |
Product Description
| Processing form | Cylinder ID(mm) | Length(m) | Straightness（mm/m) | Tolerance on ID | Roughness(μm） |
| Cold drawn | 30-250 | ≤13m | 0.2-0.5 | H9-H11 | 0.8-1.6 |
| Precision rolling | 40-800 | ≤13m | 0.2-0.3 | H7-H9 | 0.2-0.4 |
| Honing | 40-800 | ≤7m | 0.2-0.3 | H7-H9 | 0.4-0.8 |
| Rolling | 40-400 | ≤7m | 0.2-0.3 | H8 | ≤0.4 |
Dimension Tolerance
| Size of ID(mm) | ID Tolerance | Tolerance of wall thickness | ||||
| H7 | H8 | H9 | H10 | H11 | ||
| 30 | 0.021 0 | 0.033 0 | 0.052 0 | 0.084 0 | 0.130 0 | ±5% |
| >30-50 | 0.025 0 | 0.039 0 | 0.062 0 | 0.100 0 | 0.160 0 | |
| >50-80 | 0.030 0 | 0.046 0 | 0.074 0 | 0.120 0 | 0.190 0 | |
| >80-120 | 0.035 0 | 0.054 0 | 0.087 0 | 0.140 0 | 0.220 0 | |
| >120-180 | 0.040 0 | 0.063 0 | 0.100 0 | 0.160 0 | 0.250 0 | |
| >180-250 | 0.046 0 | 0.072 0 | 0.115 0 | 0.185 0 | 0.290 0 | |
| >250-315 | 0.052 0 | 0.081 0 | 0.130 0 | 0.210 0 | 0.320 0 | |
| >315-400 | 0.057 0 | 0.089 0 | 0.140 0 | 0.230 0 | 0.360 0 | |
Why choose us
1. Well equipment with high technology machines, we could manage many kinds of honed tube with high precision, short lead time(the annual output of precision cold-drawn seamless tube can reach 60,000tons), and also competitive price.
2.Have rich experience and very mature technology. The honed/pre-honed/SRB tube for hydraulic cylinder can manufactured by Gr.B, ST 52, SAE1026, 25Mn, 27SiMn.
Company Infromation
Qingzhou Longyue Hydraulic Machine Co.,Ltd located in Qingzhou, a new national sanitary civilized harbor industry city. It has grown over the years in the distribution trading hot rolled seamless steel pipe by top manufacture (Like TPCO, Valin , CSST ,Baosteel and etc). It accomplished a leadership in the research and production of hot rolled and cold drawn high pressure gas cylinder tube, high precision cold drawn seamless hydraulic cylinder tube, and hard chrome planted bars and other transmission and mechanism tubes in China.
Depend on good quality and competitive price, Qingzhou Longyue Hydraulic Machine has achieved good reputation in the specific market. Our market extends to European, American, Korea, India, Japan, and South American.
- Place of Origin: china
- Brand Name: longyue
- Model Number: LYY01
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Honed Tube for Hydraulic Cylinder | |
Material: | ST52, CK45, 4140, 16Mn, 42CrMo, E355, Q345B, Q345D, Stainless Steel 304/316, Duplex 2205,etc. |
Delivery Condition: | BK, BK S, GBK, NBK |
ID: | 20mm - 1500mm |
Length: | max 13m |
Type: | Seamless, Cold Drawn |
Straightness: | ≤ 0.5/1000 |
Roughness: | 0.2-0.4 u |
Tolerance EXT: | DIN2391, EN10305, GB/T 1619 |
Tolerance INT: | H7, H8, H9 |
Protection: | anti-rust oil on inside and outside surface, plastic caps in both ends. |
Packing: | bundle with steel strip and knitting strip, or wooden case. |