PH is shorthand for "Precipitation Hardening" which is a heat treatment that is a bit different from that of the conventional heat treatment of the Martensitic types.

High strength, excellent corrosion performance, and a simplified heat treatment process are advantages of the PH types as compared to the conventional  martensitic types.

An initial "solution treatment" at high temperature .....typically 1900 degrees F....  assures that all the alloy elements needed for the hardening reaction are uniformly distributed within the metal structure. At these temperatures the structure is austenitic. From this temperature, the alloy is cooled at a rate that retains the distribution of the hardening elements in solution.

In this video we cover the balance of the martensitic grades we didn't discuss in part 1. We cover the following types of 400 stainless steel: 410, 414, 418 (Greek Ascoloy), 420, 422, 431, 440 A, 440 B and 440 C. We also discuss these metals and their applications as well as how they perform after heat treatment.

In this video we try to start answering the question: What is Martensitic Stainless Steel? How does Martensitic Stainless Steel differ from other types of stainless steel like austenitic and ferritic types? In this video we describe the different aspects of Martensitic Stainless Steel and dive into various grade or type descriptions. For instance, we discuss 403, 410, 416 in this video. Stay tuned for the next part in the Martensitic Stainless Steel!

In this video I discuss the different types of Ferritic Stainless Steels. 409, 430 F, 430 F Se, 434, 436, 442 and 446. All are part of the 400 series of stainless steel. Ferritic grades are relatively low strength among the stainless steels and are not as easily welded or formed as the Austenitic types.

This podcast is focused on the most commercially popular Austenitic types. For Example, in this video we will discuss, 303, 303S, 303Se, 304, 304L, 316, 317 and 317L.

Introduction to types of stainless steels and their characteristics. Type 200, 300, 400, PH and Duplex Stainless Steels are all discussed. This is video 1 in a series about metal for people who want to learn about metallurgy more easily! For any questions or for more information, please check out michlinmetals.com.