ISO 16468:2015 pdf download

ISO 16468:2015 pdf download

ISO 16468:2015 pdf download.Investment castings (steel, nickel alloys and cobalt alloys) — General technical requirements
1 Scope
This International Standard specifies technical requirements for castings (steel, nickel alloys, and cobalt alloys) produced by the investment-casting process. The International Standards specifying metallurgical material requirements for steel, nickel alloy, and cobalt alloy casting grades are listed in the Bibliography. The requirements stated in this International Standard form an integral part of the material specification. In cases of conflict, the requirements of this specification take precedence over the individual material specification requirements.
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 4986, Steel castings — Magnetic particle inspection
ISO 4987, Steel castings — Liquid penetrant inspection
ISO 4990, Steel castings — General technical delivery requirements
ISO 4992-1, Steel castings — Ultrasonic examination — Part 1: Steel castings for general purposes
ISO 4992-2, Steel castings — Ultrasonic examination — Part 2: Steel castings for highly stressed components
ISO 4993, Steel castings — Radiographic inspection
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F,G, H, K, N, T)
ISO 10474, Steel and steel products — Inspection documents
ISO 11970, Specification and approval of welding procedures for production welding of steel castings
ISO 13520, Determination of ferrite content in austenitic stainless steel castings
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 primary heat
quantity of metal processed in a single furnace or refining vessel at one time, in such a manner, as to produce the desired composition and properties
4 Materials and manufacture
4.1 Melting process
Primary heats shall be made by the electric furnace process, with or without separate refining, such as argon-oxygen-decarburization (AOD), vacuum-oxygen-decarburization (VOD), vacuum-induction- melting (VIM), etc., unless otherwise specified in the individual specification or agreed upon between the purchaser and manufacturer. Primary heats may be used directly for producing castings or converted into ingot, bar, shot, or other suitable form, for later remelting as a sub-heat.
4.2 Remelting process
Sub-heats shall be produced from primary-heat metal in suitable batch sizes by an electric induction furnace, with or without atmosphere protection, such as vacuum or inert gas, unless otherwise specified in the individual specification or agreed upon between the purchaser and manufacturer. Revert (gates, sprues, risers, and rejected castings) shall not be remelted except in primary heats. Additions of up to 5 %, by mass, are permitted for compositional adjustments and deoxidation.