Insulated cup 316 stainless steel and 304 which good?

The material model of the water cup liner refers to 304 stainless steel, which is fully known as austenitic stainless steel. 304 stainless steel is food grade stainless steel approved by the state, and is commonly used in stainless steel tableware. 304 stainless steel is a stainless-steel brand manufactured according to ASTM standard of the United States. 304 stainless steel has good corrosion resistance and heat resistance, and is widely used in tableware, water cup and other daily necessities.

In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 18% chromium and more than 8% nickel. As a result, most cups are marked with 304, but illegal vendors cheat consumers.

316 stainless steel is better! 304 and 316 are austenitic stainless steel, with content of 16-18%. The difference is that the molybdenum content of 316 stainless steel is 2% higher, so the corrosion resistance of 316 stainless steel is better than 304 stainless steel, especially chlorine corrosion resistance.

In addition, the average nickel content of 304 stainless steel is 9%, while that of 316 stainless steel is 12%. Nickel in metal materials can improve the high temperature durability, mechanical properties and oxidation resistance of materials. Therefore, the content of materials directly affects the comprehensive properties of materials.

Cold rolled 304 stainless steel is a very common stainless steel with a density of 7.93g/cm3, also known as 18 / 8 stainless steel. Its metal products have the characteristics of high temperature resistance and good processing performance, and are widely used in industry, food, medical and other industries.

The most important elements in 304 are nickel and chromium, but they are not limited to these two elements. Specific requirements are determined by product standards. According to the general judgment in industry, as long as the nickel content is more than 8%, the chromium content is more than 18%, it can be regarded as 304 stainless steel.

304 stainless steel is the most widely used Cr Ni stainless steel. It has good corrosion resistance, heat resistance, low temperature strength and mechanical properties, stamping, bending and other hot working properties, without heat treatment hardening phenomenon (service temperature - 196 ℃ - 800 ℃). It is resistant to atmospheric corrosion. If it is industrial atmosphere or seriously polluted area, it needs to be cleaned in time to avoid corrosion.