BS ISO 11973:2015 pdf download

BS ISO 11973:2015 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 and alloys for heat-resistant service.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4990, Steel castings — General technical delivery requirements
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 enquiry and purchase order.
4 Heat treatment
GX40CrSi13, GX40CrSi17, GX30CrSi7, GX40CrSi24, GX40CrSi28, and GX130CrSi29 may be annealed at a temperature of 800 °C to 850 °C. If required, GX30CrSi7 may also be supplied in the as-cast condition.Other grades produced according to this International Standard do not require heat treatment. If heat treatment is required, the treatment should be established by agreement between the manufacturer and the purchaser, and should be specified in the purchase contract.
5 Chemical composition
The chemical composition of the alloys shall comply with the values given in Table 1.
6 Mechanical properties
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. Others, whether or not in ISO 4990, may be used with this specification upon agreement between the manufacturer and the purchaser.