304 stainless steel rods are generally a general term for stainless steel and acid-resistant steel. Stainless steel refers to steel that is resistant to corrosion by weak media such as atmosphere, steam, and water, while acid-resistant steel refers to steel that is resistant to corrosion by chemically corrosive media such as acids, alkali, and salt. The main difference in chemical composition between 316 and 304 is that 316 contains Mo, and it is generally recognized that 316 has better corrosion resistance and is more resistant to corrosion than 304 in high temperature environments. Therefore, in high temperature environments, engineers generally choose parts made of 316 material. There are many types of stainless steel with different properties. It has gradually formed several major categories in the development process. According to the organizational structure, it is divided into four categories: martensitic stainless steel (including precipitation hardened stainless steel), ferritic stainless steel, austenitic stainless steel and austenite plus ferrite duplex stainless steel. 304 stainless steel rod: It has good corrosion resistance, heat resistance, low temperature strength and mechanical properties, good hot workability such as stamping and bending, and no heat treatment hardening phenomenon. Usage: tableware, cabinets, boilers, auto parts, medical equipment, building materials, food industry (use temperature -196°C to 700°C). Classified according to the main chemical composition of steel or some characteristic elements in steel, it is divided into chromium stainless steel, chromium-nickel stainless steel, chromium-nickel-molybdenum stainless steel, low-carbon stainless steel, high-molybdenum stainless steel, high-purity stainless steel, etc.; according to the performance characteristics of steel and Classified by use, it is divided into nitric acid-resistant stainless steel, sulfuric acid-resistant stainless steel, pitting corrosion-resistant stainless steel, stress-corrosion-resistant stainless steel, high-strength stainless steel, etc.; according to the functional characteristics of steel, it is divided into low-temperature stainless steel, non-magnetic stainless steel, easy-cutting stainless steel, and superplastic stainless steel. wait. The currently commonly used classification methods are based on the structural characteristics of steel, the chemical composition characteristics of steel, and a combination of the two. Generally divided into martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, duplex stainless steel and precipitation hardening stainless steel, or divided into two categories: chromium stainless steel and nickel stainless steel. Stainless steel is generally used in anti-corrosive environments, as well as medical equipment and daily necessities.

The so-called "stainless iron" is made by reprocessing recycled scrap iron, lead, steel, etc. and removing "stain". The traditional detection method is to use a magnet. Chemical composition of 410 stainless steel: C≤0.15, Si≤1.00, Mn≤1.00, P≤0.035, S≤0.030, Cr=11.50~13.50. 410 is a martensitic series stainless steel, generally used for wear resistance, heat resistance and sharpness. It is used in various occasions, because most of 410 needs to be quenched and tempered to improve its hardness and wear resistance, such as knives. At present, "stainless iron" products have a 65% share in the market because their prices play an important role. The current price of national standard stainless steel products is about 20,000 yuan per ton, and the price of national standard 7075 aluminum alloy is about 16,000 yuan per ton. Around 5,000 to 7,000 yuan per ton, while the price of "stainless iron" is only 5,000 to 7,000 yuan per ton. 410 stainless steel rods have good wear resistance and poor corrosion resistance, thus making a general summary of the shortcomings and advantages of 410 stainless steel.