What is the difference between 718H and 738
1, the difference between mold material 718H and 738 is as follows: the concept is different, equivalent to the domestic material 3Cr2NiMnMo, which is a pre-hardened plastic die steel. Pre-hardening means that the steel is pre-conditioned before the steel factory to meet the hardness requirements of the final use of the mold, and there is no need for heat treatment after the mold is processed and formed to avoid mold deformation and scrap.
2, the difference between mold material 718H and 738 is as follows: the concept is different equivalent to the domestic material 3Cr2NiMnMo, which is a pre-hardened plastic die steel. Pre-hardening means that the steel is pre-conditioned before the steel factory to meet the hardness requirements of the final use of the mold, and there is no need for heat treatment after the mold is processed and formed to avoid mold deformation and scrap.
3, 718 alloy composition is higher than 738,718 wear resistance is slightly better than 738. Different quality levels. The steel refining process of 718 is better than that of 738, and the surface finish of 718 is higher than that of 738. The smooth cutting performance is different. The cutting performance of 718 is also better than that of 738. Different applications.
4, abstract: Personal summary The difference between 738H and 718H is mainly manifested in the following aspects: the origin is different. 738H is a German brand die steel, 718H is a win 100 brand. Because the difference between 738H and 718H is not much, it is easy to be confused by everyone. Alloy composition is different. 738H and 718H differ in alloy composition.
5, 738H is higher than 738 hardness, the difference HB30~50. 738 and 738H are actually a kind of die steel, and the H behind represents the pre-hardening state, which is after tempering treatment, and the pre-hardening hardness of different steels is different, generally 30~40HRC.
6, Germany 2738(738/71 factory status: pre-hardening to 31-35HRC(290-330HB)738H pre-hardening to 330-370HB Steel characteristics: steel with nickel components, uniform hardness, good cutting, more suitable for large molds, such as electrical products, EDM processing. Usage: Used for manufacturing advanced plastic injection molds.
