2311 & P20. Is a pre-hardened plastic mold steel that is widely used in the market,and the price is very low. They are like twins,because of the similar performance of 1.2311 and P20, and the chances of their occurrence are very high.

2311&P20 is a pre-hardened plastic mold steel that is widely used in the market

2311&P20 both price are not high. They are like twins,because of the similar performance of 1.2311 and P20, and the chances of their occurrence are very high. The application is very extensive. P20 mold steel is an American standard mold steel grade, which corresponds to the Chinese brand 3cr2Mo. In theory, P20 mold steel has a certain degree of wear resistance. After Q + T processing before delivery, the hardness is between 30-35HRC. Good processing performance, mold surface can be polished, mainly used for plastic molds that do not require high mold surface finish, long-term use, plastic mold life of about 100,000 times.

2311 is a German steel brand. It is a product based on 3Cr2Mo with fine-tuned alloy composition. It reduces the wear-resistant alloy-molybdenum content and increases the hardenable alloy composition-nickel content to increase Above 100mm, the uniformity of the surface hardness and core hardness of the 2311 mold steel. Its performance is similar to that of P20, and its application is also the same as P20. China ’s 2311 and P20 mold steels have achieved batch production, which minimizes the steelmaking cost of mold steels to meet the market’s low demand. Major steel mills have almost no longer produced P20 with 3Cr2Mo composition, and more than 90% of the mill have changed to 2311 mold steel with lower alloy content, which has been produced in batches. The original dimensions are 2.2-2.3 meters in width and 6 meters in length,or above. The price is getting close to the cost of carbon steel.

2311 & P20 advantages and disadvantages

The advantages of 2311 & P20 are that the output is very large and the price is very attractive. The disadvantage is that large-scale production of molds is easy to form segregation, resulting in uneven hardness, poor cutting performance, and hard drilling.

If you got a fake 1.2738, that’s because you got P20H actually.

Now some factories make the hardness of P20 higher ,it was named P20H. Some people pretend that P20H as 728H or OT718H,I know it will make some factories angry about this news，I just tell the truth. P20H is used for plastic molds, casing molds, Shell structural parts molds, large plastics for car seats, etc., some are also used for some precision plastic mold mold bases, cold die-cast mold bases, or mechanical parts that require wear resistance.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com