In fact, different types of stainless steel only have different alloying elements added to them, so that they have certain characteristics we need. The same is true for 316 stainless steel. When some properties of 304 stainless steel cannot meet our needs, 316 was developed. Xiyouwo Stainless Steel mainly makes 201 and 304 stainless steel pipes. What are the differences between 304 and 316? Let’s analyze them together today!
1. Brand issue. The extensions of 304 and 316 are 304L and 316L respectively, and their respective grades are as follows:
304 is 06Cr19Ni10, 304L is 00Cr19Ni10;
316 is 0Cr17Ni12Mo2, 316L is 00Cr17Ni14Mo2.
2. Food grade issues.
People often ask if 304 is food grade? In fact, speaking of materials, the material content of 304 has reached food grade. There are probably three common food-grade materials in the market: 304, 316 and 430 stainless steel. 304 is commonly found in small household appliances or water cups, 316 is sometimes used in medical equipment, and 430 is often used as stainless steel in knives. But we also need to clarify a concept here. It does not mean that the material is food grade. It also includes whether the manufacturing and other aspects meet food grade standards. For example, Xiyouwo makes stainless steel pipes for decoration, and will There are also stainless steel pipe factories that specialize in producing food-grade stainless steel water pipes, and the required process links are different.
3. Corrosion resistance issues.
316 stainless steel is stainless steel produced by adding some molybdenum to 304 stainless steel to resist pitting corrosion. In various types of water quality (distilled water, drinking water, river water, boiler water, etc.), the corrosion resistance of 304 stainless steel and 316 stainless steel is almost the same, but when the content of chloride ions in the medium is very high, 316 stainless steel is more suitable.
4. Price issue.
Due to the molybdenum and nickel elements added to 316, 316 stainless steel is more expensive than 304 stainless steel.
5. Low carbon issue.
304L and 316L materials have lower carbon content than 304 and 316, and there is a clear comparison in the material content table. The main reason why stainless steel does not rust is the chromium-rich oxide film formed on the surface. However, when the temperature is too high, intergranular corrosion will occur. Therefore, the low carbon content in 304L and 316L reduces intergranular corrosion. It should be noted that higher intergranular corrosion susceptibility does not mean that non-low carbon content is more susceptible to corrosion. This susceptibility is also higher when in a high chlorine environment.
All stainless steel materials have their specific functions and scope of use. Proper use of their advantages and disadvantages can create greater value for us.
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