BS ISO 19960:2015 pdf download

BS ISO 19960:2015 pdf download.Cast steels and alloys with special physical properties
1 Scope
This International Standard specifies cast steel and alloy grades with special physical properties.The cast steel and alloy grades covered by this International Standard are used in applications which require low linear thermal expansion, or low ferromagnetic responses, or low galling properties.
NOTE Annex A gives information on ISO grade designation and available UNS numbers which are similar to the ISO grade designations.
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
ISO 11970, Specification and approval of welding procedures for production welding of steel castings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4990 and the following apply.
3.1 galling
damage or breaking of the surface by friction or abrasion
4 General conditions for delivery
Materials furnished according to 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.
5 Chemical composition
The cast steel and alloy grades shall conform to the requirements for chemical composition specified in Table 1.
6 Mechanical properties
Cast steel and alloy grades shall conform to the mechanical property requirements given in Table 2 up to the maximum ruling thickness. Verification of impact properties is not required except when indicated by the customer. Test blocks used to verify the mechanical properties shall not have a thickness exceeding 100 mm. For blocks taken from castings, the test bar location and the mechanical properties required shall be agreed between the manufacturer and purchaser. For grades GX3NiCo32, GX3NiCo29-17, and G-NiCr13SnBiMo, no mechanical properties are specified.
7 Heat treatment
Castings shall be heat treated in accordance with the requirements of Table 3.
8 Welding
Castings shall be welded in accordance with the procedures described in ISO 11970.
9 Verification of physical properties
When physical properties are specified, the method of measurement and acceptance requirements shall be the subject of an agreement between the manufacturer and purchaser. Typical values for some physical properties are given in Table 4.
10 Supplementary requirements
A list of standardized supplementary requirements for use at the option of the purchaser is included in ISO 4990. The subclauses of ISO 4990 which are ordinarily considered suitable for use with this International Standard are given in Annex A. Other supplementary requirements, whether or not in ISO 4990, may be used with this International Standard upon agreement by the manufacturer and purchaser.