
DIN 28181 X5CrNi18-10 X5CrNiMo17-12-2 X6CrNiTi18-10 X6CrNiMoTi17-12-2 Heat Exchanger Tube Seamless Stainless Steel Tubes For Tubular Heat Exchangers
Material
The seamless stainless steel tubes specified by DIN 28181 are designed for use in tubular heat exchangers. These tubes are made from high-quality stainless steel grades that offer excellent corrosion resistance and mechanical properties, making them suitable for various industrial applications.
Specification
The tubes conform to the DIN 28181 standard, which outlines the requirements for seamless stainless steel tubes used in heat exchangers. The specifications include dimensions, tolerances, and mechanical properties that ensure the tubes can withstand high pressures and temperatures.
Key Features
- Corrosion Resistance: Excellent resistance to a wide range of corrosive environments.
- High Strength: Capable of withstanding high pressures and temperatures.
- Seamless Construction: Provides uniformity and reliability in performance.
- Versatile Applications: Suitable for various industries, including chemical, petrochemical, and power generation.
Chemical Composition
Steel Grade | C (%) | Cr (%) | Ni (%) | Mo (%) | Ti (%) |
X5CrNi18-10 | 0.08 | 18.0 | 8.0 | - | - |
X5CrNiMo17-12-2 | 0.08 | 17.0 | 12.0 | 2.0 | - |
X6CrNiTi18-10 | 0.08 | 18.0 | 10.0 | - | 0.5 |
X6CrNiMoTi17-12-2 | 0.08 | 17.0 | 12.0 | 2.0 | 0.5 |
Mechanical Properties
Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
X5CrNi18-10 | 210 | 520-720 | 40 | 160 |
X5CrNiMo17-12-2 | 220 | 530-750 | 35 | 170 |
X6CrNiTi18-10 | 220 | 520-720 | 40 | 160 |
X6CrNiMoTi17-12-2 | 230 | 540-760 | 35 | 180 |
Steel Grade
The primary steel grades used for these seamless stainless steel tubes include:
- X5CrNi18-10
- X5CrNiMo17-12-2
- X6CrNiTi18-10
- X6CrNiMoTi17-12-2
Application
These stainless steel tubes are widely used in:
- Chemical Processing: For heat exchangers in chemical reactors.
- Petrochemical Industry: In refineries and petrochemical plants.
- Power Generation: In steam generators and condensers.
- Food and Beverage: For heat transfer in food processing.
Possible Alternative Grades
While the specified grades are commonly used, alternative grades may also be considered based on specific application requirements:
- AISI 304: A general-purpose stainless steel with good corrosion resistance.
- AISI 316: Offers better corrosion resistance, especially in marine environments.
- AISI 321: Provides improved high-temperature stability due to titanium addition.





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Over the past 30 years, the company has been gradually developing new technologies and materials to meet
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