13-8 stainless steel and 17-4 stainless steel are both types of precipitation-hardening stainless steels that offer high strength and corrosion resistance. However, there are some differences between the two. 13-8 stainless steel, also known as PH13-8Mo or UNS S13800, contains 13% chromium, 8% nickel, and 2% molybdenum. It is a martensitic precipitation-hardening stainless steel that offers high strength, toughness, and corrosion resistance. It can be heat-treated to achieve high levels of strength and hardness, and it is often used in aerospace and other high-stress applications. 17-4 stainless steel, also known as UNS S17400, contains 17% chromium, 4% nickel, and 4% copper. It is a martensitic precipitation-hardening stainless steel that offers high strength, hardness, and corrosion resistance. It can be heat-treated to achieve a range of strength levels, and it is commonly used in applications such as aerospace, chemical processing, and oil and gas. In general, 13-8 stainless steel offers higher strength and toughness than 17-4 stainless steel, while 17-4 stainless steel offers better corrosion resistance. The choice between the two will depend on the specific application requirements and conditions.
13-8 PH VS 17-4 PH
|Property||13-8 Stainless Steel||
17-4 Stainless Steel
|Corrosion Resistance||Good||Very Good|
|Common Applications||Aerospace, High-Stress||
Aerospace, Chemical Processing, Oil & Gas