1593
Stainless steel grades that has been involved in this process are the austenitic type mainly SS 316L and the precipitated hardened stainless steel grade PH .
 material: Stainless steel; concept or principle: process; material: austenitic; material: SS; machanical property: precipitated hardened; material: steel; concept or principle: PH
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 material: Stainless steel; concept or principle: process; material: austenitic; material: SS; machanical property: precipitated hardened; material: steel; concept or principle: PH