4012
An estimated threshold value of P·v-1/2 for fabricating satisfactory Al-2.5Fe ( mass % ) alloy parts could be identified .
 fabricating, alloy, be
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 fabricating, alloy, be