DIN 2391 standard specifies the Seamless steel tubes used forMechanical and Automobile.

DIN 2391标准规定了用于机械和汽车的无缝钢管。

The main products of steel / steel grade: DIN2391-1(ST35, ST45, ST52).

主要产品钢/钢种：DIN2391-1（ST35、ST45、ST52）。

DIN 2391 is included in DIN Handbook 3 and 272. Gives dimensions for seamless precision steel tubes; these tube dimensions have been selected from the range of manufacturable tube dimensions which are mainly used as design elements.

DIN 2391包含在DIN手册3和272中。给出了无缝精密钢管的尺寸；这些管尺寸是从主要用作设计元素的可制造管尺寸范围中选择的。

What is the difference between Din 2391 and Din 3304? Din 2391和Din 3304有什么区别？

DIN 2391 applies to seamless precision steel tubes and in compliance with ISO/DIN 3304, those tube dimensions have been selected from the range of manufacture dimensions which are mainly used as design elements.

DIN 2391适用于无缝精密钢管，符合ISO/DIN 3304标准，这些钢管尺寸是从主要用作设计元素的制造尺寸范围中选择的。

Scope范围

DIN2391 Part 2 specifies dimensions for cold finished, seamless precision steel tubes and is to be used in conjunction with DIN2391 part2 which states the relevant technical delivery conditions. The preferred sizes listed in standard are mainly used in mechanical and automotive engineering.

DIN2391第2部分规定了冷加工无缝精密钢管的尺寸，并与DIN2391的第2部分结合使用，后者规定了相关的交货技术条件。标准中列出的首选尺寸主要用于机械和汽车工程。

Where steel tubes of dimensions specified in this standard are to comply with the technical delivery conditions listed in subclause 1.2 of DIN 2391 Part 2.

本标准规定尺寸的钢管应符合DIN 2391第2部分第1.2款所列的技术交付条件。

DIN 2391 seamless precision tubes applications – Used in Hydraulic & pneumatic cylinder, Mechanical and Automotive engineering.

DIN 2391无缝精密管应用-用于液压和气动缸、机械和汽车工程。

Chemical Composition (%) of DIN2391  DIN2391的化学成分（%）

Delivery Conditions交货条件

The tubes shall be manufactured from cold drawn or cold rolled processes. The tubes shall be supplied in one of the delivery conditions as follows:

管子应采用冷拔或冷轧工艺制造。管子应按以下交付条件之一供应：

Delivery Condition Symbol in accordance with EN10305 and DIN2391.交付条件符号符合EN10305和DIN2391。

Mechanical Properties机械性能

Inspection and test list for the DIN 2391 Standard  DIN 2391标准检验和测试清单

Marking标记

The following marking shall be shown on a label attached to the bundle:捆上的标签上应显示以下标记：

• the manufacturer’s name or trade mark;·制造商名称或商标；
• the specified dimensions;·指定尺寸；
• the number of this European Standard;·本欧洲标准的编号；
• the steel name or number;·钢材名称或编号；
• the cast number;铸造数量
• the delivery condition;·交货条件；
• in the case of specific inspection, an identification number (e. g. order or item number) which permits the correlation of the product or delivery unit to the related document.·
• 在特定检查的情况下，一个标识号（如订单或项目号），允许将产品或交付单位与相关文件相关联。

Protection and Packing:保护和包装：

• Packed in wooden box or bundles protected with plastic paper, and suitably protected for sea-worthily delivery or as requested.·
• 用塑料纸保护的木箱或捆包包装，并适当保护，适合海运或按要求运输。
• The tubes shall be delivered with a temporary corrosion protection. The type of protection shall be at the discretion of the manufacturer.·
• 交付的管子应具有临时防腐保护。保护类型应由制造商自行决定。