Mechanical Properties
(A) phase transition temperature (approximate) Ac1 = 735 ℃, Ac3 = 855 ℃, Ar3 = 835 ℃, Ar1 = 680 ℃
(2) normalizing regulate temperature 920 ~ 950 ℃, cooled baked. Hardness of 131 ~ 156HBS.
(3) Cold Blank softening temperature specification 700 ~ 720 ℃, holding time is 8 ~ 15h, and then to 50 ~ 100 ℃ / h of cooling rate, with the oven temperature down to ≤550 ~ 600 ℃, cooled baked.
Before treatment hardness ≤143HBS, after softening hardness ≤131HBS. [2]
(4) regulate the temperature quenching 910 ℃ ± 10 ℃, 10% NaCl brine cooling.
   (5) the measured yield strength fy = 275Mpa, the modulus of elasticity E = 206Gpa, Poisson's ratio ν = 0.3.
(6) the shear strength of 275 ~ 392MPa, tensile strength of 253 ~ 500MPa, yield strength of 275MPa, elongation of 25%.