GB/T 24590 12Cr18Ni9 Stainless Steel Tube Enhanced Tubes for Efficient Heat Exchanger
Introduction
Efficient heat exchangers play a crucial role in various industries where heat transfer is involved. GB/T 24590 12Cr18Ni9 stainless steel tubes have been specifically designed to enhance heat exchanger performance. In this article, we will provide an overview of this material, its key features, chemical composition, mechanical properties, steel grade, application, and possible alternative grades.
Material Specifications
The GB/T 24590 standard outlines the specifications for 12Cr18Ni9 stainless steel tubes used as enhanced heat exchanger tubes. These tubes are designed to efficiently handle heat transfer in various applications. The specification details are as follows:
| Specification | Description |
| Standard | GB/T 24590 |
| Material | 12Cr18Ni9 Stainless Steel |
| Tube Type | Enhanced Heat Exchanger Tubes |
Key Features
The 12Cr18Ni9 stainless steel tubes offer several key features that make them suitable for efficient heat exchangers. These features include:
- Enhanced heat transfer efficiency.
- Excellent corrosion resistance, even in aggressive environments.
- High strength and durability.
- Good weldability and formability.
- Wide range of application suitability.
Chemical Composition
The chemical composition of GB/T 24590 12Cr18Ni9 stainless steel is as follows:
| Element | Composition (%) |
| C | max. 0.15 |
| Si | max. 1.00 |
| Mn | max. 2.00 |
| P | max. 0.045 |
| S | max. 0.030 |
| Ni | 8.00 - 11.00 |
| Cr | 17.00 - 19.00 |
Mechanical Properties
The mechanical properties of GB/T 24590 12Cr18Ni9 stainless steel are as follows:
| Property | Value |
| Tensile Strength (MPa) | ≥ 520 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 40 |
| Hardness (HB) | ≤ 187 |
| Impact Toughness (J/cm2) | ≥ 100 |
Steel Grade
12Cr18Ni9 stainless steel falls under the GB/T 1220 standard, with an approximate equivalent to AISI 302 stainless steel. It is a commonly used austenitic stainless steel grade known for its corrosion resistance and high-temperature strength.
Application
12Cr18Ni9 stainless steel tubes find extensive usage in various industries, particularly in heat exchanger systems. They are suitable for applications including:
- Power generation plants.
- Chemical and petrochemical industries.
- Food and beverage processing.
- Pharmaceutical industries.
- HVAC systems.
Possible Alternative Grades
While 12Cr18Ni9 stainless steel offers excellent properties, there are alternative grades available for specific applications. Some possible alternative grades include:
- 1Cr18Ni9Ti stainless steel
- 0Cr18Ni9 stainless steel
- 0Cr17Ni12Mo2 stainless steel
These grades have similar characteristics and can be used as alternatives depending on specific requirements.
In conclusion, GB/T 24590 12Cr18Ni9 stainless steel tubes are designed to enhance heat exchanger efficiency. With their excellent corrosion resistance, high-temperature strength, and wide application range, these tubes are an ideal choice for various industries. Furthermore, the availability of alternative grades allows for customization according to specific needs and operating conditions.
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