660 stainless steel standard and application
author: www.qishine.com
2025-01-06
Introduction
Stainless steel is an important metal material that is widely used in various industries. In order to ensure the quality and performance of stainless steel products, a series of stainless steel standards have been formulated.
Stainless steel is an important metal material that is widely used in various industries. In order to ensure the quality and performance of stainless steel products, a series of stainless steel standards have been formulated.
660 stainless steel is one of them. This article will introduce the relevant standards of 660 stainless steel in detail.
1. Definition of 660 stainless steel
660 stainless steel is a high-strength, corrosion-resistant stainless steel material. It is mainly composed of iron (Fe), chromium (Cr), nickel (Ni) and other elements. 660 stainless steel has excellent mechanical properties and corrosion resistance and is widely used in chemical, petroleum, aerospace, pharmaceutical and food industries.
660 stainless steel is a high-strength, corrosion-resistant stainless steel material. It is mainly composed of iron (Fe), chromium (Cr), nickel (Ni) and other elements. 660 stainless steel has excellent mechanical properties and corrosion resistance and is widely used in chemical, petroleum, aerospace, pharmaceutical and food industries.
The international standard grade of 660 stainless steel is UNS S66286. In China, the grade of 660 stainless steel is 06Cr25Ni20Si2.
2. Chemical composition requirements of 660 stainless steel
The chemical composition requirements of 660 stainless steel are clearly specified in the standard, including the content ranges of elements such as iron, chromium, and nickel. For example, the standard requires that the iron content should be between 70% and 80%, the chromium content should be between 16% and 18%, and the nickel content should be between 10% and 14%. These requirements are intended to ensure the stable and reliable performance of 660 stainless steel materials.
The chemical composition of 660 stainless steel is as follows:
| 660 | C | Si | Mn | P | S | Cr | Ni | Mo | Al | Ti | Nb+Ta | Fe |
| MIN | - | 1.5 | - | - | - | 24.0 | 19.0 | 1.0 | 0.35 | 1.90 | 0.45 | Remaining |
| MAX | 0.08 | 2.5 | 1 | 0.04 | 0.03 | 27.0 | 22.0 | 1.5 | 0.85 | 2.35 | 0.80 |
3. Mechanical properties requirements of 660 stainless steel
The mechanical properties of 660 stainless steel refer to its performance under mechanical loading. The standard specifies in detail the tensile strength, yield strength, elongation and other properties of 660 stainless steel. For example, the standard requires that the tensile strength of 660 stainless steel should not be less than 600 MPa, the yield strength should not be less than 450 MPa, and the elongation should not be less than 25%. These requirements ensure the reliability and safety of 660 stainless steel during use.
Our 660 mechanical properties are as follows:
| Tensile strength(Mpa) | ≥930 |
| Yield strength (Mpa) | ≥635 |
| Elongation (%) | ≥15 |
| Sectional shrinkage (%) | ≥50 |
| Hardness (HBW) | ≤321 |
4. Corrosion resistance requirements of 660 stainless steel
The corrosion resistance of 660 stainless steel refers to its performance in corrosive media. The standard sets requirements for the corrosion rate of 660 stainless steel in different corrosive media. For example, in hydrochloric acid solution, the corrosion rate of 660 stainless steel should not exceed 0.1 mm/a. These requirements ensure the durability and stability of 660 stainless steel in harsh environments.
5. Processing requirements of 660 stainless steel
The processing requirements of 660 stainless steel are specified in the standard. Including requirements for heat treatment, cold processing, welding, etc. The standard requires that 660 stainless steel should maintain appropriate temperature and time during processing to ensure that its performance is not affected. At the same time, there are also clear regulations on welding process parameters, weld quality, etc. to ensure the quality of 660 stainless steel welded joints.
The heat treatment process of our 660 stainless steel is solution annealing. The heating temperature is 1050℃, the holding time is 1 hour, and the cooling method is air cooling. After heat treatment, the 660 stainless steel has good machinability and corrosion resistance.
660 stainless steel has good processing performance and can be processed by conventional cold processing and hot processing methods. When cutting, high-hardness tools should be used and the sharpness of the tools should be maintained. When hot processing, attention should be paid to controlling the heating temperature and heating time to avoid exceeding the thermal stability range of 660 stainless steel.
660 stainless steel has good welding performance and can be welded by conventional arc welding, TIG welding, MIG welding and other methods. Before welding, the workpiece should be preheated and suitable welding materials should be used. During welding, care should be taken to protect the welding area to avoid the generation of pores and inclusions.
The surface treatment of 660 stainless steel can be done by mechanical polishing, chemical polishing, electrolytic polishing, etc. When performing surface treatment, care should be taken to maintain the cleanliness and flatness of the workpiece to avoid scratches and dents.
6. Requirements for the testing method of 660 stainless steel
The standard provides a detailed introduction to the testing methods for 660 stainless steel, including requirements for chemical composition analysis, mechanical properties testing, corrosion resistance testing, etc. These testing methods can be used to evaluate the quality and performance of 660 stainless steel materials to ensure that the products meet the standard requirements.
The standard provides a detailed introduction to the testing methods for 660 stainless steel, including requirements for chemical composition analysis, mechanical properties testing, corrosion resistance testing, etc. These testing methods can be used to evaluate the quality and performance of 660 stainless steel materials to ensure that the products meet the standard requirements.
7. Application scope of 660 stainless steel
660 stainless steel is widely used in many fields due to its excellent performance. For example, chemical equipment, oil pipelines, aerospace devices, pharmaceuticals and food. It can be used to make high temperature resistant, corrosion resistant and wear resistant equipment and parts, such as high temperature furnace tubes, chemical reactors, centrifuge parts, compressor impellers, etc. The standard clearly defines the application scope of 660 stainless steel to guide users to correctly select and apply 660 stainless steel materials.
660 stainless steel is widely used in many fields due to its excellent performance. For example, chemical equipment, oil pipelines, aerospace devices, pharmaceuticals and food. It can be used to make high temperature resistant, corrosion resistant and wear resistant equipment and parts, such as high temperature furnace tubes, chemical reactors, centrifuge parts, compressor impellers, etc. The standard clearly defines the application scope of 660 stainless steel to guide users to correctly select and apply 660 stainless steel materials.
8. Standards for 660 stainless steel
The international standards for 660 stainless steel include ASTM A453/A453, MAMS 5737, UNS S66286, etc. Domestic standards include GB/T 16926-2019, etc.
The international standards for 660 stainless steel include ASTM A453/A453, MAMS 5737, UNS S66286, etc. Domestic standards include GB/T 16926-2019, etc.
9. Storage and transportation of 660 stainless steel
The storage and transportation of 660 stainless steel should be moisture-proof, rust-proof, and avoid collision and extrusion, etc. During storage and transportation, 660 stainless steel materials should be placed vertically, and wooden boards or plastic gaskets should be placed between the materials to avoid contact and friction.
The storage and transportation of 660 stainless steel should be moisture-proof, rust-proof, and avoid collision and extrusion, etc. During storage and transportation, 660 stainless steel materials should be placed vertically, and wooden boards or plastic gaskets should be placed between the materials to avoid contact and friction.
In conclusion
The 660 stainless steel standard is an important basis for ensuring the quality and performance of 660 stainless steel materials. By clarifying the requirements for chemical composition, mechanical properties, corrosion resistance, etc., the standard ensures the stability and reliability of 660 stainless steel. At the same time, the standard also clearly stipulates the processing technology, testing methods and application scope of 660 stainless steel, providing guidance for users. In actual applications, users should choose 660 stainless steel materials that meet the standard requirements according to specific needs to ensure product quality and safety.
The 660 stainless steel standard is an important basis for ensuring the quality and performance of 660 stainless steel materials. By clarifying the requirements for chemical composition, mechanical properties, corrosion resistance, etc., the standard ensures the stability and reliability of 660 stainless steel. At the same time, the standard also clearly stipulates the processing technology, testing methods and application scope of 660 stainless steel, providing guidance for users. In actual applications, users should choose 660 stainless steel materials that meet the standard requirements according to specific needs to ensure product quality and safety.
The above is a detailed introduction to the 660 stainless steel standard. I hope it will be helpful to you.
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