201 stainless steel plate and 304 stainless steel plate are one of the most common stainless steel varieties in our lives. From the outside, the unprofessional can hardly see the difference. Today, we will analyze and compare their performance from a professional point of view?
1. In terms of mechanical properties: in terms of fatigue strength, 201 has greater hardness and toughness than 304, or 304 has better fatigue resistance;
2. In terms of price: taking 1.0mm stainless steel plate as an example, the price of 304 stainless steel is 12.3 yuan/kg, and the price of 201 is 6.5 yuan/kg; the quality of 304 stainless steel plate is better, but the price is higher than that of 201 stainless steel plate.
3. In terms of color and appearance: 201 has high manganese content, very bright surface, bright black, and high manganese is easy to rust. 304 has a high chromium content, and the surface appears magnesia and does not rust.
4. Anti-rust: stainless steel is not easy to rust, because the chromium-rich oxide formed on the surface of the steel can protect the steel body. 201 stainless steel is a high-manganese stainless steel with high hardness, and the carbon content and nickel content are lower than 304 stainless steel. Therefore, in terms of rust resistance, 304 stainless steel is better than 201 stainless steel. In the same outdoor environment, 304 stainless steel will not rust within 3-4 years, and 201 stainless steel may rust after 6 months;
5. In terms of composition elements: the difference between 201 stainless steel plate and 304 stainless steel plate is nickel: 201 is composed of 17cr-4.5ni-6mn-n, which is an alternative steel for 301 stainless steel.
304 is composed of 18cr-9ni, which is the most widely used stainless steel and heat-resistant steel for food production equipment, general chemical equipment, nuclear energy, etc.