The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.

6: HEAT TREATMENT
    A significant amount of this grade of steel is used in the as- forged condition, since its machinability in this condition has been found to be better than that in the normalized condition.
    Little is to be gained, at this carbon level, by a quenching treatment.
    At this carbon level, annealing after forging may not be necessary, and depending upon the hardness after forging and the complexity of the part being forged, machining may be carried out on the as-forged parts. If parts are of complex shape and hence there are structural variations throughout the part, then normalizing is in order.
NORMALIZING
    Normalizing is seldom carried out on carbon contents at this level, but may be used prior to surface hardening. The normalizing temperature range for this grade is typically 1650-1700oF (900 – 925oC.) followed by air cooling.
HARDENING
    This grade of steel is not normally subjected to hardening and tempering treatments as the hardness obtained from such treatments would not warrant their being performed. Carburizing might be carried out at 1620-1690oF (880-920oC,) and carbonitriding at 1470 -1600oF (800-875oC.)
    Hardening of the carburized case would be performed at 1430-1500oF (780-820oC) followed by a water quench and a tempering treatment at 300-400oF (150-200oC) to improve case toughness with a minimum effect on its hardness. Case hardness values of Rc 58 may be obtained on carburized C1018.