Vanadium Content in 4330V Steel

[Lazorbeam]

Hi all,

Hope I'm posting this in the right forum! I have some questions with regards to 4330V steel. This is a Vanadium-modified 4330 steel, with Vanadium contents ranging from 0.05 - 0.15%.

I work for a company that builds tools for the mining industry, and our steel suppliers are divided on the issue of Vanadium content. Some say it should be near the 0.05% minimum, others say it should be at or near 0.15%.

The problem is that nobody here understands the impact of Vanadium in this steel and how (if at all) it affects its properties.

Any input?

 

[Astronuc]

Hi all,

Hope I'm posting this in the right forum! I have some questions with regards to 4330V steel. This is a Vanadium-modified 4330 steel, with Vanadium contents ranging from 0.05 - 0.15%.

I work for a company that builds tools for the mining industry, and our steel suppliers are divided on the issue of Vanadium content. Some say it should be near the 0.05% minimum, others say it should be at or near 0.15%.

The problem is that nobody here understands the impact of Vanadium in this steel and how (if at all) it affects its properties.

Any input?

Vanadium is a carbide and nitride former, so it strengthens steels by dispersion-strengthening. It also affects grain structure.

It seems that a number of suppliers prefer a nominal content of about 0.07 or mid range of 0.05 to 0.10%. There could be synergistic effects with Cr and Mo contents.

http://www.westyorkssteel.com/alloy-steel/oil-and-gas/aisi-4330v/
http://www.westyorkssteel.com/files/aisi-4330v.pdf

http://customer.cartech.com/assets/documents/datasheets/4330+V.pdf
http://www.encoremetals.com/docs/product_manual/Section%202.0%20Alloy%20Steels.pdf

It is also important to consider the heat treatment and hot/cold working which will affect the microstructure.

Effects of V on steels:

http://vanitec.org/wp-content/uploads/2011/09/Vanadium-in-Medium-and-High-Carbon-Steels.pdf
http://www.hsla-v.org/assets/documents/Effect_of_Vanadium.pdf
http://www.kau.se/sites/default/files/Dokument/subpage/2010/02/21_269_287_pdf_18759.pdf

https://online.tugraz.at/tug_online/voe_main2.getvolltext?pCurrPk=32837
http://www.archivesmse.org/vol33_2/3321.pdf

http://steel.keytometals.com/Articles/Art182.htm
http://steel.keytometals.com/Articles/Art85.htm

It's best to look at different sources.

One might try to obtain some samples with one on the low end of the V range and one on the high end and compare tensile strength, hardness, and impact strength.