EN 10305 European standard for seamless cold drawn steel pipe of circular cross section used in hydraulic and pneumatic power systems.

EN 10305液壓和氣動動力係統中使用的圓形橫截麵無縫冷拔鋼管的歐洲標準。

The allowed pressure rates and temperatures are the responsibility of the customer in accordance with the state of the art and in application of the safety coefficients specified in the application regulations, codes or standards.

根據最新技術和應用法規、規範或標準中規定的安全係數，允許的壓力率和溫度由客戶負責。

Tubes according to this EN 10305 European standard are characterised by having precisely defined tolerances on dimensions and a specified surface roughness.

符合EN 10305歐洲標準的管子的特點是具有精確定義的尺寸公差和指定的表麵粗糙度。

EN 10305 seamless precision steel tube shall be manufactured from hot finished seamless tubes by cold drawning. Other suitable methods of cold working are permitted. The tubes shall be delivered in the delivery condition +N which means that after the final cold drawing operation the tubes are normalized in a controlled atmosphere.

EN 10305無縫精密鋼管應由冷拔熱加工無縫管製成。允許采用其他合適的冷加工方法。管子應在交付條件+N下交付，這意味著在最終冷拔操作後，管子在受控氣氛中正火。

NBK means protective heat-treating under the non-oxidation enviroment to get a bright and smooth surface for the tubes.

NBK是指在非氧化環境下進行保護性熱處理，以獲得光亮光滑的管材表麵。

Chemical Composition (%) of EN 10305-1  EN 10305-1的化學成分（%）

Mechanical and technological properties of EN 10305-1  EN 10305-1的機械和技術性能

Condition on delivery of EN 10305-1:  EN 10305-1交付條件：

Note:注：

• The yield point for the annealed (GBK)condition on delivery is at least 50% of the (ultimate) tensile strength. Depending upon the degree of deformation in the drawing operation, the yield point of tubes delivered in the cold-finished/hard (BK)and cold-finished/soft(BKW) conditions, may be increased to a level close to the tensile strength.·
• 交付時退火（GBK）條件的屈服點至少為（極限）抗拉強度的50%。根據拉拔操作中的變形程度，在冷加工/硬（BK）和冷加工/軟（BKW）條件下交付的管子的屈服點可能會增加到接近抗拉強度的水平。
• In calculating the yield point, the following values are recommended : cold-finished/hard condition on delivery ≥ 80% of the tensile strength, cold-finished/soft condition on delivery ≥ 70% of the tensile strength.·
• 在計算屈服點時，建議使用以下值：交付時的冷加工/硬條件≥抗拉強度的80%，交付時的冷加工/軟條件≥抗拉性能的70%。

Quality grade of EN 10305-1EN 10305-1的質量等級

The tubes are supplied in the following quality grades :管子的質量等級如下：

• precision steel tubes intended primarily for mechanical stressing, without any particular quality requirement and without acceptance test certificate.·
• 主要用於機械應力的精密鋼管，沒有任何特殊的質量要求，也沒有驗收測試證書。
• precision steel tubes intended primarily for mechanical stressing, with special quirement and exclusively with acceptance test certificate.·
• 主要用於機械應力的精密鋼管，有特殊要求，隻有驗收測試證書。
• precision steel tubes with special requirement according to section 12.·
• 符合第12節特殊要求的精密鋼管。

Theses requirements and corresponding tests must be agreed, with the customer having to specify his requirements at the time of enquiry and on ordering.

這些要求和相應的測試必須達成一致，客戶必須在詢價和訂購時說明他的要求。

Seamless cold drawn precision steel tubes in acc. with EN 10305-1符合EN 10305-1的無縫冷拔精密鋼管

Seamless precision tubes are used wherever a high level of measuring accuracy, smooth surfaces and improved resistance values are of the essence. These tubes are available in any desired dimension

無縫精密管用於需要高測量精度、光滑表麵和改進電阻值的場合。這些管子有任何所需的尺寸

Seamless precision tubes are used for the following applications無縫精密管用於以下應用

• Heat exchangers·熱交換器
• Elevator tubes·電梯管
• Gas bottles
• Pit props
• HPL tubes (with phosphated, alternatively galvanised surface)HPL管（表麵磷化或鍍鋅）
• Hawse pipes錨鏈管
• Motorbike/bicycle frames摩托車/自行車架
• Rivets鉚釘
• Pump pipes泵管
• Textile machine construction紡織機械結構
• Cylindrical pipes, piston pipes, telescopic pipes圓柱形管、活塞管、伸縮管
• Stabiliser pipes穩定器管

Seamless tubes for automotive applications汽車用無縫管

• Transmission shafts·傳動軸
•  Fuel injection pipes·燃油噴射管
• Piston pins·活塞銷
• Ball cages·球籠
• Steering systems·轉向係統
• Tubes for power steering systems·動力轉向係統用管
• Tubes for drive shafts·傳動軸管

EN 10305-1 E355+SR Seamless Cold Drawn Steel Tubes  EN 10305-1 E355+SR無縫冷拔鋼管

Standard EN 10305 covers steel-produced precision tubes. This standard includes delivery conditions for six different parts. Part 1 or as referred to as EN 10305-1 refers to Seamless cold drawn precision tubes. These precision tubes are specifically designated with the letter E, thereby the manufacturing processes adhere to the standard and keep tight tolerances, making them well suited for use as machine parts. This is because a precision steel tube en 10305-1 is identical to the system it is to be attached to.

標準EN 10305涵蓋了鋼製精密管。本標準包括六個不同零件的交付條件。第1部分或EN 10305-1是指無縫冷拔精密管。這些精密管專門用字母E表示，因此製造過程符合標準並保持嚴格的公差，使其非常適合用作機器零件。這是因為精密鋼管en 10305-1與它所連接的係統相同。

Hence, there is no error, nor is there any wiggle room for a mismatch to occur in the system. Therefore the use of EN 10305-1 material to make a cold-drawn precision tube is a welcome one. In addition to being designated as machine steels, there are many grades with differing yield strengths that could be used in the production of EN 10305-1 equivalent tube.

因此，係統中沒有錯誤，也沒有發生不匹配的餘地。因此，使用EN 10305-1材料製造冷拔精密管是受歡迎的。除了被指定為機器鋼外，還有許多具有不同屈服強度的等級可用於日皮视频网站EN 10305-1等效管。

Generally, most buyers prefer the use of steels that have minimum yield strength of about 235 N/mm2 or 355 N/mm2. The EN 10305-1 material is often designated with a relevant treatment the tubes have been processed with. For instance, the tube with the designation en 10305-1 E235+N would indicate that the steel is to be delivered in a normalized condition. There are several benefits of using an E355+SR EN 10305-1 Cold drawn seamless precision tube. Not only do they have a tighter level of tolerances, but they have better mechanical properties and hardness. Moreover, the cold drawing improves the surface of the EN 10305-1 E235+C tube as they are smoother.

一般來說，大多數買家更喜歡使用最小屈服強度約為235 N/mm2或355 N/mm2的鋼。EN 10305-1材料通常被指定為經過相關處理的管材。例如，標有en 10305-1 E235+N的管子表示鋼材將在正火狀態下交付。使用E355+SR EN 10305-1冷拔無縫精密管有幾個好處。它們不僅具有更嚴格的公差，而且具有更好的機械性能和硬度。此外，冷拔改善了EN 10305-1 E235+C管的表麵，因為它們更光滑。

EN 10305 is characterized by having exactly defined tolerances on dimensions and specified surface roughness. Typical fields of applications are in the furniture, vehicle, and general engineering industries. E235 in the pickled, normalized condition, to be delivered in standard length of 5.8 m.

EN 10305的特點是具有精確定義的尺寸公差和規定的表麵粗糙度。典型的應用領域是家具、汽車和一般工程行業。E235在酸洗、正火狀態下，以5.8米的標準長度交付。

Welded cold drawn precision steel tubes in acc. with EN 10305-2符合EN 10305-2的焊接冷拔精密鋼管

Precision tubes according to EN10305-2 are manufactured in a cold forming process for stretch-reduced or HF-welded hollow sections (shell).

符合EN10305-2的精密管采用冷成型工藝製造，適用於拉伸減小或高頻焊接的空心型材（殼體）。

Welded drawn tubes are used primarily in the automotive industry, for instance as prop shafts, rubber/metal parts, drive shafts or cam shafts.

焊接拉製管主要用於汽車工業，例如作為傳動軸、橡膠/金屬零件、傳動軸或凸輪軸。

The application options for welded precision steel tubes according to EN 10305-2 are determined by specific technical characteristics, such as

根據EN 10305-2，焊接精密鋼管的應用選項由特定的技術特性決定，例如

• high level of dimensional accuracy for the internal and external diameter·內徑和外徑的高尺寸精度
• restricted tolerances for wall thickness·壁厚的限製公差
• process-related smooth surfaces·與工藝相關的光滑表麵
• good concentricity·同心度良好
• improved resistance values through cold forming·通過冷成型提高電阻值
• freely selectable dimensions·可自由選擇的尺寸