... info such as chemcial composition, mechanical properties, such as tensile strength, yield strength, elongation, hardness etc, thus can be fully traceable.Technical ... used in mining, coal, engineering fields, such as engineering machinery, environmental machinery, rolling machine, soil shifter machine etc. GBJFESSABDillidurDilligerNM400JFE-EH400HARDOX400400VXAR400NM500JFE-EH500HARDOX500500VXAR500 Any ...