ISO 11973 pdf download

ISO 11973 pdf download.Heat-resistant cast steels and alloys for general applications 1 Scope This International Standard specifies chemical composition and mechanical properties of cast steels for heat resistant service. 2 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 4990:1 986, Steel castings — General technical delivery conditions. 3 General conditions for delivery Materials furnished in conformity with this International Standard shall conform to the applicable requirements of ISO 4990 including the supplementary requirements that are indicated on the inquiry and purchase order. 4 Heat treatment GX40CrSi1 3, GX40CrSi1 7, GX30CrSi7, GX40CrSi24, GX40CrSi28 and GX1 30CrSi29 may be annealed at a temperature of 800 o C to 850 o C. If required, GX30CrSi7 may also be supplied in the as-cast condition. Other grades produced to this International Standard do not require heat treatment. If heat treatment is required, the treatment shall be established by mutual agreement between the manufacturer and the purchaser, and shall be specified in the purchase contract. 5 Chemical requirements Alloys shall conform to the chemical requirements prescribed in Table 1 . 6 Mechanical requirements Mechanical testing at room temperature shall be performed when agreed upon between the manufacturer and purchaser in which case the material shall conform to the requirements listed in Table 2. 7 Maximum use temperature Limited information on maximum use temperatures are included in Table 2. These values are intended to allow comparison of grades. The actual conditions of service must be considered when selecting a grade including the composition of the environment and service mechanical loading. 8 Supplementary requirements A list of standardized supplementary requirements for use on the option of the purchaser is included in ISO 4990. Those which are ordinarily considered suitable for use with this specification are given below. The details of these are listed in ISO 4990. Others, whether or not in ISO 4990, may be used with this specification upon agreement between the manufacturer and the purchaser....