6) Residual stress must be lie in the range of -70 MPa (compressive) and *30 MPa (tensile), outside the influence of the shot-blast cleaning. Possible deviations from requirements shall be evaluated individually by Product Engineering ・ C.R.F. Test method according to FPT.MEC029. Additional heat treatment, according to Iveco Std. 17-1100. is required if this specification is not reached.7) Hardness 190-250 HB. Test method according to Iveco Std. 18-1310 on location specified on the drawing.8) Casting must conforms to the requirements of Iveco Std. 18-1310 Functional Level 2. Acceptability Grade B. Radiographic check to be performed on main bearing caps and cylinder head bolts area9) UTS - Tensile specimens to be taken from main bearing caps area (location specified on the drawing). Specimen geometry must be according to the dimensions below indicated (short and long specimens allowed). If a short specimen is preferred, the stated minimum tensile strength limits must be increased of 10%.