17-4 PH Round Bar is a type of stainless steel bar which has 17% chromium, 4% nickel, as well as other elements like copper and niobium. Precipitation hardening steels, of which this type is also referred to as 630 stainless steel, are steels that get stronger and harder over time through aging and heat treatment. 17-4 PH Round Bar is renowned for having a fantastic balance of toughness, corrosion resistance, and strength. Where high performance and reliability are essential, such as in the aerospace, defense, and oil and gas industries, this is widely used. It is great to handle and safe to use.