ISO 185-2020 pdf free download.Grey cast irons – CI assification. The material shall be designated as given in either Table 1 or Table 2. The designation system is given in ISO/TR 15931. The number in position 3 of the designation in Table 1 is the minimum tensile strength of the grade as determined by test pieces machined from standardized 30 mm test bars or from cast samples of corresponding relevant wall thickness. The number in position 3 of the designation in Table 2 is the maximum Brinell hardness value of the grade for relevant wall thickness > 40 mm to  80 mm. 5 Order information The following information shall be supplied by the purchaser: a) the complete designation of the material; b) any special requirements that have to be agreed between the manufacturer and the purchaser. All agreements between the manufacturer and the purchaser shall be made by the time of acceptance of the order. 6 Manufacture Unless otherwise specified by the purchaser, the method of manufacture of grey cast irons, including their chemical composition, to obtain the specified mechanical properties shall be left to the discretion of the manufacturer. The manufacturer shall ensure that the requirements of this…