Heat treatment for ASTM A182 GrF22 to achieve 220BHN

[anthro]

Hi guys,

I need some help here on heat treatment. I have a ASTM A182 GrF22 billet. I am just told i need to achieve a hardness of 220BHN. How do I go about precribing the heat treatment steps in order to achieve this hardness? I mean I know about age hardening, tempering, quenching, etc... But how do i spepcify wat steps to do and the temperature and time?

I am not looking for direct answers here, but hopefully someone out there can point me to the right direction or tell me where to start or what to refer to.

Any help is greatly appreciated!

Thanks & Regards.

 

[Q_Goest]

Look in ASTM A182. It's part of the spec. F22V has Brinell hardness of 174-237 according to Table 3. Class 1 and 3 of F22 are considerably lower than 220. I'd suggest you also verify what the customer wants as it doesn't look like you can be assured of 220 BHN.

 

[oswaler]

I can provide you with some guidance on how to approach this task. The first step is to understand the material you are working with, ASTM A182 GrF22. This is a low alloy steel that is typically used in high temperature and high pressure applications, such as in the oil and gas industry.

In order to achieve a hardness of 220BHN, you will need to perform a heat treatment process called quenching and tempering. This involves heating the material to a specific temperature and then rapidly cooling it in a quenching medium, such as oil or water. This process will harden the material, but it will also make it brittle. To reduce the brittleness and improve the toughness of the material, it will then need to be tempered.

To determine the specific steps and temperatures for the heat treatment, you will need to consult the material's datasheet or the manufacturer's recommendations. These will provide you with the desired temperature and time for both the quenching and tempering processes. It is important to follow these recommendations closely to achieve the desired hardness.

Additionally, the microstructure of the material will also play a role in determining the hardness. So, it is important to also consider the cooling rate during quenching, as well as the composition of the material.

In summary, to achieve a hardness of 220BHN for ASTM A182 GrF22, you will need to perform a quenching and tempering process, following the recommendations provided by the material's datasheet or manufacturer. It is also important to consider the material's microstructure and composition in order to achieve the desired hardness. I hope this helps guide you in the right direction. Best of luck with your heat treatment process.