- Guaranteed Secure Payments on Every Order
- 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.
FAQ
Question: Can you produce inch sizes?
Answer: Yes, we can produce any size with OD between 50mm and 356mm include any inch sizes like 3", 4", 4.25" till 13.5".
Question: What is the max wall thickness of tubes you can produce?
Answer: wall thickness is not limited, because for very thick wall tubes, we can use deep hole drilling and deep hole boring.
Question: How do you ensure the quality?
Answer: We know the standard specification exactly. We have stable raw material suppliers who are leading suppliers in the world. Even if there is quality problem, we can stop it before we deliver. In another words, any products that fail in quality will not be delivered to you.
Question: What kind of payment method you can accept?
Answer: we can accept payment methods like T/T, L/C, D/P. Payment methods is determined by our evaluation to our customers. We cooperate with Sinosure and this enables us to evaluate our customers in a worldwide level.
Question: What do you think are your advantages?
Answer: Good quality, fast delivery time, and guarantee after delivery are all our advantages. We adopted fexible operation policy that aims to provide our customers with both quality products and perfect experience of cooperation.
- 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. |