DIN 2440 is the German industrial standard for steel tubes that specifies the technical requirements for medium-weight threaded steel tubes

DIN 2440是德国钢管工业标准，规定了中等重量螺纹钢管的技术要求

DIN 2440 is the German industrial standard for steel tubes that specifies the technical requirements for medium-weight threaded steel tubes, also known as black and galvanized steel tubes or pipes. This standard was first published in 1962 and later revised in 1978. DIN 2440是德国钢管工业标准，规定了中等重量螺纹钢管的技术要求，也称为黑色和镀锌钢管或管道。该标准于1962年首次发布，随后于1978年进行了修订。

The DIN 2440 standard covers a range of threaded steel tubes made from non-alloyed and low-alloyed steels, with diameters ranging from 20mm to 165mm and wall thicknesses ranging from 1.8mm to 6.3mm. These steel tubes are commonly used in the construction of pipelines and plumbing systems for conveying gas, air, water, and other fluids.

DIN 2440标准涵盖了一系列由非合金钢和低合金钢制成的螺纹钢管，直径范围为20mm至165mm，壁厚范围为1.8mm至6.3mm。这些钢管通常用于建造输送气体、空气、水和其他流体的管道和管道系统。

The technical requirements laid out in DIN 2440 include chemical composition, mechanical properties, dimensional tolerances, and testing methods, among others. For example, the standard specifies the maximum permissible carbon content of the steel tubes, which should not exceed 0.17%, and sets out the minimum values for tensile strength and elongation.

DIN 2440中规定的技术要求包括化学成分、机械性能、尺寸公差和测试方法等。例如，该标准规定了钢管的最大允许碳含量，不应超过0.17%，并规定了抗拉强度和伸长率的最小值。

In addition, DIN 2440 also includes requirements for the surface finish of the steel tubes, particularly for galvanized tubes, which should have a uniform zinc coating to protect against corrosion.

此外，DIN 2440还包括对钢管表面光洁度的要求，特别是镀锌管，镀锌管应具有均匀的镀锌层以防止腐蚀。

DIN 2440 is an important industrial standard for steel tubes used in plumbing and pipeline systems, providing technical specifications and quality requirements for threaded steel tubes made from non-alloyed and low-alloyed steels.

DIN 2440是管道和管道系统中使用的钢管的重要工业标准，为非合金钢和低合金钢制成的螺纹钢管提供了技术规范和质量要求。

There are different forms to the pipes such as polished, annealed and pickled, bright and annealed types. The Carbon Steel DIN 2440 St 33-2 Seamless Tubes can come with different pipe ends such as plain end, beveled end, threaded pipe and tube types. The applications are in oil, gas, fluid transfer lines and in heat exchanger and boiler components. The DIN 2440 Grade St 33-2 Round Pipes are the most used ones where the other forms such as square pipes are available. The chemical composition of the pipes contains carbon, silicon, manganese, chromium, nickel and molybdenum. The DIN 2440 Steel Pipes have 185MPa minimum yield strength and 310MPa minimum tensile strength.

管道有不同的形式，如抛光、退火和酸洗、光亮和退火类型。碳钢DIN 2440 St 33-2无缝管可配备不同的管端，如平端、斜端、螺纹管和管类型。应用于石油、天然气、流体输送管线以及热交换器和锅炉部件。DIN 2440 St 33-2级圆管是使用最多的圆管，其他形式如方管也可用。管道的化学成分包括碳、硅、锰、铬、镍和钼。DIN 2440钢管的最小屈服强度为185MPa，最小抗拉强度为310MPa。Please feel free to contact us for a full price list and other information on the DIN 2440 ST33.2 Carbon Steel Tube products.

DIN 2440 ST33.2碳钢管产品的列表和其他信息。

DIN 2440 Threaded Steel Tubes have internal threads that permit easy and speedy, leakproof connections. Threaded components like the din 2440 st 35 pipes are used in areas that cannot be welded. In some industries, the use of welding to connect a tube to fittings or flanges could cause undesirable flares or explosions, which are hazardous to both the application and the environment. The internal threads in the din 2440 Steel pipe aid in easy mounting or connectivity to a piping system without causing any accidents. Therefore, several industries, including the oil and gas industries may use these din 2440 st33 pipes for connectivity. Another reason that many businesses have carbon steel pipes in grade din 2440 st 33.2 as a part of their piping system is that they have good hardness properties. To improve these properties, often buyers place in an order for carburization or nitriding to be carried out on the carbon steel din 2440 tube. Both these processes ensure that the tubes become hard without becoming brittle.

DIN 2440螺纹钢管具有内螺纹，可实现简单、快速、防漏的连接。螺纹部件，如din 2440 st 35管，用于无法焊接的区域。在某些行业中，使用焊接将管道连接到配件或法兰可能会导致不希望的火焰或爆炸，这对应用和环境都是危险的。din 2440钢管中的内螺纹有助于轻松安装或连接到管道系统，而不会造成任何事故。因此，包括石油和天然气行业在内的多个行业可能会使用这些din 2440 st33管道进行连接。许多企业将din 2440 st 33.2级碳钢管作为其管道系统的一部分的另一个原因是它们具有良好的硬度性能。为了提高这些性能，买家通常会订购对碳钢din 2440管进行渗碳或渗氮处理。这两个过程都确保了管子变硬而不会变脆。

Material Specification of DIN 2440  DIN 2440材料规范

DIN 2440 Grade St 33-2 Carbon Steel Seamless Tubes and DIN 2440 st 35 Steel pipe with smooth tube ends DIN 2440 St 33-2级碳钢无缝管和DIN 2440 St 35钢管，管端光滑

Nominal Diameter (ND): 6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125 mm (1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 4, 5 inch)

Outside Diameter (OD): 10,2 - 139,7 mm

Wall Thickness: DIN 2440: 2 - 4,6 mm;
DIN 2441: 2,65 - 5,40 mm

Dimension Standard of DIN 2440 DIN 2440尺寸标准

DIN 2440 Steel Tubes Sizes  DIN 2440钢管尺寸

Threaded tube DIN 2440 Wall Thickness螺纹管DIN 2440壁厚