3655
Yield strength , ultimate tensile strength , and microhardness of samples with a relative density of 99 % were measured to be 540 ± 15 MPa , 660 ± 20 MPa and 254 ± 7 HV , respectively and higher than mechanical properties of conventionally manufactured 304L stainless steel .
 Yield strength, ultimate tensile strength, microhardness, samples, relative density, be, MPa, MPa, mechanical properties, manufactured, stainless steel
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:
 Yield strength, ultimate tensile strength, microhardness, samples, relative density, be, MPa, MPa, mechanical properties, manufactured, stainless steel