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When it comes to the difference in stainless steel gate valve materials, you must first understand the characteristics of each common stainless steel valve material. Take a look at the differences between these common stainless steel materials.
Difference between 304 and 316 stainless steel valves
First of all, 316 stainless steel contains Mo, which has better corrosion resistance than 304 stainless steel in high temperature environment. Therefore, engineers generally choose 316 material parts in high temperature environment.
Secondly, there are also differences between the two brands; 304 stainless steel corresponds to the Chinese brand 0Cr18Ni9; 316 stainless steel corresponds to the Chinese brand 0Cr17Ni12Mo2.
Third, 316 mainly reduces the Cr content, increases the Ni content, and increases Mo2% ~ 3%. Therefore, its corrosion resistance is stronger than 304, suitable for use in chemical, seawater and other environments. Similarly, 316 cost is higher than 304. Generally, 316 is used in places with higher requirements instead of 304.
What is the difference between stainless steel valve 304 and 201
1. Specifications: The commonly used stainless steel plates are divided into two types, 201 and 304. The actual composition is different. The quality of 304 is better, but the price is more expensive, and the 201 is worse. 304 is imported stainless steel plate, 201 is domestic stainless steel plate.
2. The composition of 201 is 17Cr-4.5Ni-6Mn-N, which is a Ni-saving steel and a substitute for 301 steel. It is magnetic after cold working and is used for railway vehicles.
3. The composition of 304 is 18Cr-9Ni, which is the most widely used stainless steel and heat-resistant steel. Used in food production equipment, Xitong chemical equipment, nuclear energy, etc.
4, 201 is high in manganese, the surface is very bright with dark and bright, high manganese is easy to rust. 304 contains more chromium, the surface is matte, and does not rust. The two are compared together. The most important thing is that the corrosion resistance is different. The corrosion resistance of 201 is very poor, so the price is much cheaper. Because 201 contains nickel, the price is lower than 304, so the corrosion resistance is not as good as 304.
5. The difference between 201 and 304 is the problem of nickel. And the price of 304 is now more expensive, but at least 304 can guarantee that it will not rust during use. (Stainless steel potions can be used for experiments)
6.Stainless steel is not easy to rust because the chromium-rich oxide formed on the surface of the steel body can protect the steel body. The 201 material belongs to high manganese stainless steel, which has a higher hardness than 304 and high carbon and low nickel.
7, the composition is different (mainly from the carbon, manganese, nickel, chromium containing several aspects to distinguish between 201 and 304 stainless steel)
Steel (C) Silicon (Si) Manganese (Mn) Phosphorus (P) Sulfur (S) Chromium (Cr) Nickel (Ni) Molybdenum (Mo) Copper (Cu)
AISI (304) ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.03 18-20 8-10
AISI (201) ≤0.15 ≤1.00 5.5-7.5 ≤0.05 ≤0.03 16-18 3.5-5.5