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What is the difference between 304 and 316L?
Release Date:
2024-08-20
Author:
What tests are performed on 304 and 316 stainless steels, respectively? _ Differences between 304 and 316 stainless steels
1. Different References
1. 304: A common grade of stainless steel with a density of 7.93 g/cm³; it is also referred to in the industry as 18/8 stainless steel.
2. 316L: This is the designation for a grade of stainless steel; AISI 316L corresponds to the U.S. grade, and SUS 316L corresponds to the Japanese grade. In China, the standardized numerical designation is S31603.
II. Different Content
1. 304: Possesses the inherent corrosion resistance of stainless steel, with a chromium content of at least 18% and a nickel content of at least 8%. 304 stainless steel is a grade of stainless steel manufactured in accordance with U.S. ASTM standards.
2. 316L: A derivative of the 18-8 austenitic stainless steel, it contains 2–3% molybdenum. Based on 316L, numerous grades have been developed; for example, adding a small amount of titanium yields 316Ti, while introducing a small amount of nitrogen produces 316N. Furthermore, by increasing the nickel and molybdenum content, one can obtain 317L.
III. Use Different
1. 304: Exhibits excellent formability and weldability. It is suitable for plate heat exchangers, corrugated tubes, household products (such as tableware, cabinets, indoor piping, water heaters, boilers, bathtubs, etc.), automotive components (including windshield wipers, mufflers, and molded parts), medical devices, construction materials, the chemical industry, the food industry, agriculture, and marine components, among other applications.
2. 316L: In high-temperature environments, its corrosion resistance surpasses that of 304 and is even more robust. Consequently, under high-temperature operating conditions, engineers typically opt for components made from 316 material.
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Let us introduce you to what aluminum tubing is.
Aluminum tubing typically refers to pipes made from aluminum alloys. Aluminum alloys are materials composed of aluminum combined with other metallic elements, characterized by their light weight, high strength, and excellent corrosion resistance, making them widely used across various industries.
Aluminum tubes are mainly classified into the following types.
Classified by precision: ordinary aluminum tubes and precision aluminum tubes; the latter typically undergo secondary processes such as cold drawing and rolling after extrusion.
With the rapid growth of the new‑energy vehicle industry, automotive thermal management systems are confronting entirely new challenges and opportunities. In this field, aluminum tubing, thanks to its superior performance and broad range of applications, has steadily emerged as an unsung leader in thermal management for new‑energy vehicles, providing robust support for enhanced vehicle performance and safe operation.
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Aluminum tubes are classified into four main types based on their forming process: hot-extruded aluminum tubes (the mainstream), cold-drawn and precision-rolled aluminum tubes, welded aluminum tubes, and impact-extruded pharmaceutical aluminum tubes. Among these, the most widely used in the industry is seamless or split‑die extruded aluminum tubing.
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Compared with ordinary low‑carbon steel, 409 stainless steel sheet exhibits poorer thermal conductivity and lower elongation; consequently, greater deformation forces are required during shearing and bending. For 321 stainless steel sheet, springback during bending is more pronounced than in carbon steel. Moreover, since the elongation of stainless steel sheet is lower than that of carbon steel, the bend radius R of the workpiece should be larger than that for carbon steel during bending operations; otherwise, cracking is likely to occur.
What is the difference between 202 stainless steel and 304 stainless steel?
202 stainless steel and 304 stainless steel are both austenitic stainless steels at their core, non-magnetic, and visually quite similar. However, the key difference lies in their nickel content, which results in significant variations in their mechanical properties and price.
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