1869
Moreover , the heat treatment plan ( 6h at 490 °C ) recommended by the DMLS system manufacturer has been found not to be the optimal in terms of achieving high strength , hardness , ductility and low anisotropy for the MS1 material .
 heat treatment, DMLS, manufacturer, be, strength, hardness, ductility, anisotropy, material
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:
 heat treatment, DMLS, manufacturer, be, strength, hardness, ductility, anisotropy, material