1014
Duplex stainless steel is extremely effective against stress corrosion cracking due to existence of an equal portion of austenite and ferrite phases .
 material: stainless steel; concept or principle: stress corrosion cracking; material: austenite; material: ferrite
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: stress corrosion cracking; material: austenite; material: ferrite