DIN 28181 P235GH Welded Steel Tubing Stainless Steel Tube For Heat Exchangers
DIN 28181 P235GH 16Mo3 P215NL X5CrNi18-10 X5CrNiMo17-12-2 Welded Steel Tubing
Introduction
Welded steel tubing is essential in various industrial applications, particularly in heat exchangers. This article explores the specifications, key features, chemical composition, mechanical properties, and applications of specific steel grades including P235GH, 16Mo3, P215NL, X5CrNi18-10, and X5CrNiMo17-12-2.
Material Specification
The materials discussed are designed to meet specific standards for strength, corrosion resistance, and thermal conductivity, making them suitable for heat exchangers and other demanding applications.
Key Features
- High Strength: These materials exhibit excellent mechanical properties, ensuring durability under pressure.
- Corrosion Resistance: The inclusion of chromium and nickel in certain grades enhances resistance to oxidation and corrosion.
- Weldability: Designed for easy welding, these materials can be fabricated into complex shapes.
- Thermal Conductivity: Suitable for heat transfer applications, ensuring efficient operation in heat exchangers.
Chemical Composition
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) | V (%) |
|---|---|---|---|---|---|---|---|---|---|
| P235GH | 0.12 | 0.55 | 1.40 | 0.025 | 0.015 | - | - | - | - |
| 16Mo3 | 0.12 | 0.50 | 0.40 | 0.025 | 0.015 | 0.90 | - | 0.30 | - |
| P215NL | 0.12 | 0.50 | 1.40 | 0.025 | 0.015 | - | - | - | - |
| X5CrNi18-10 | 0.07 | 0.50 | 1.00 | 0.045 | 0.015 | 18.00 | 8.00 | - | - |
| X5CrNiMo17-12-2 | 0.07 | 0.50 | 1.00 | 0.045 | 0.015 | 17.00 | 12.00 | 2.50 | - |
Mechanical Properties
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| P235GH | 235 | 360-510 | 24 | 130 |
| 16Mo3 | 250 | 410-550 | 22 | 140 |
| P215NL | 235 | 360-510 | 24 | 130 |
| X5CrNi18-10 | 210 | 500-700 | 40 | 160 |
| X5CrNiMo17-12-2 | 220 | 520-720 | 40 | 160 |
Steel Grade
The steel grades discussed are commonly used in the manufacturing of welded steel tubing for heat exchangers. Each grade has unique properties that make it suitable for specific applications.
Application
- Heat Exchangers: Used in various industries including power generation, chemical processing, and HVAC systems.
- Pipelines: Suitable for transporting fluids under high pressure and temperature.
- Boilers: Essential in steam generation and heat transfer processes.
Possible Alternative Grades
- P265GH: Similar to P235GH but with higher yield strength.
- 15Mo3: An alternative to 16Mo3 with slightly different chemical composition.
- X6CrNiMo17-12-2: A variant of X5CrNiMo17-12-2 with enhanced corrosion resistance.
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