Core products: high-precision aluminum tubes, wear-resistant mandrels, high-strength seamless aluminum tubes, aluminum sheets and coils in various specifications, anti-corrosion corrugated aluminum sheets, industrial-grade aluminum rods, and customized aluminum profiles.
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Introduction to Stainless Steel
Release Date:
2024-08-05
Author:
Stainless steel can be classified into five types: austenitic, martensitic, ferritic, duplex, and precipitation-hardening.
200-series austenitic steels—including grades 202, 203, 204, and 205—exhibit non-magnetic properties and cannot be strengthened by heat treatment. They also offer excellent formability, making them widely used in applications such as washing machines and bathtubs.
Austenitic 300-series steels, including grades 301, 302, 303, 304, 305, 308, 309, 310, 314, 316, 317, 321, 330, and 347, exhibit outstanding cold‑working characteristics. These grades are non‑magnetic, cannot be strengthened by heat treatment, and offer excellent formability. The addition of molybdenum significantly enhances their corrosion resistance. This series is widely used in food‑processing equipment, chemical‑process equipment, and other applications.
400-series ferritic steels—including grades 405, 409, 429, 430, 434, 436, 442, and 446—are magnetic but do not undergo heat treatment. These grades are primarily used in automotive interiors and kitchen appliances.
The 400 series comprises martensitic stainless steels, with grades including 403, 410, 414, 416, 420, 422, 431, and 440. These steels are magnetic and are used after heat treatment, primarily for fasteners, pump shafts, and turbine blades.
Precipitation-hardening grades—such as 13-8, 15-5, 15-7, 17-4, and 17-7—are primarily used in applications like valves, gears, and petrochemical equipment.
Duplex steels—grades include 329, 2205, 2304, 2507, and 3RE60. These grades exhibit superior resistance to stress-corrosion cracking compared with austenitic stainless steels and higher hardness than pure ferritic steels. They are widely used in pipelines, pressure vessels, and other applications.
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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.
Production and Manufacturing of Aluminum Tubes
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.
What is the difference between 409 stainless steel and 430 stainless steel?
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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