15-5PH Stainless Steel Round Bar Rod UNS S15500 AMS 5659 ASTM A564

Stainless steel 15-5 is a precipitation hardening martensitic stainless steel designed to have higher toughness than 17-4 ph stainless steel. 15-5PH Stainless Steel Bar is used in applications that require better corrosion resistance and transverse properties than other similar martensitic grades. The required strength and toughness can be changed by the temperature range during heat treatment.
15-5PH Execution Standard:
UNS S15500
AMS 5659
ASTM A564


15-5PH Heat Treatment
Heat treatment is used to strengthen the 15-5PH alloy. Treated 15-5 stainless steel is available in eight standard conditions - H 900, H 925, H 1025, H 1075, H 1100, H 1150, H 1150+1150 and H 1150-M. Heat treatment of 15-5 PH follows the following steps:
Use austenite conditioning. Air cooling to transform austenite to martensite. Precipitation hardening until the desired condition is achieved. 15-5PH Stainless Steel Bar can be further heat treated in the precipitation hardened condition to improve resistance to stress corrosion cracking for high temperature applications. Fabrication is recommended after the metal has been heat treated to minimize deformation and stress.
Processing and Heat Treatment
Processing Methods: 15-5PH stainless steel bars can be processed by cutting, forging, cold working, hot working, etc. During processing, it is necessary to select the appropriate processing method and process parameters according to the specific processing requirements.
Heat treatment: 15-5PH stainless steel bars usually need precipitation hardening heat treatment to improve their strength and hardness. The heat treatment process includes solution treatment, aging treatment and other steps. The purpose of solution treatment is to fully dissolve the alloying elements in the matrix to form a uniform solid solution; aging treatment is to precipitate the alloying elements from the solid solution by keeping it at a certain temperature for a period of time to form a precipitation hardening phase, thereby improving the strength and hardness of the material.
Performance characteristics
Excellent high temperature performance: It can maintain high strength and stability at high temperatures, can be used stably for a long time, and is suitable for equipment and pipelines in high temperature environments.
Good corrosion resistance: It has good resistance to corrosive media such as acids, alkalis, and salts.
High strength: The strength is 30-50% higher than that of general stainless steel, and it has good tensile and compression resistance.
Good machinability: It has good machinability and weldability, and conventional processing and welding methods can be used.
Good oxidation resistance: It also has excellent oxidation resistance in high temperature air.
Low thermal expansion coefficient: The thermal expansion coefficient is lower than that of general stainless steel, making it more stable at high temperatures.
Low carbon content: It is more stable at high temperatures and is not easy to produce carbides.
15-5PH application areas
Valves
Aircraft parts
Gears
Pump parts
In short, 15-5PH stainless steel bar is a precipitation hardening stainless steel material with excellent performance. It has the characteristics of high strength, good corrosion resistance, machinability and weldability. It is widely used in aerospace, petrochemical, medical equipment, machinery manufacturing and other fields. During use, it is necessary to select appropriate processing methods and heat treatment processes according to specific application requirements to ensure the performance and quality of the material.