ISO 9152 pdf download.Aerospace — Bolts, with MJ threads, in titanium alloys, strength class 1 100 MPa — Procurement specification
1 Scope
This International Standard specifies the characteristics and quality assurance requirements for MJ threads bolts made in titanium alloy, of strength class 1 1 00 MPa, for aerospace construction. It is applicable whenever it is referenced in a definition document.
2 Normative references
The following normative documents contain 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 editions of the normative documents 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 2859-1 :1 989, Sampling procedures for inspection by attributes — Part 1 : Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection . ISO 3452:1 984, Non-destructive testing — Penetrant inspection — General principles . ISO 4288:1 996, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and procedures for the assessment of surface texture . ISO 5855-2:1 988, Aerospace — MJ threads — Part 2: Limit dimensions for bolts and nuts . ISO 6892:1 998, Metallic materials — Tensile testing at ambient temperature . ISO 7870:1 993, Control charts — General guide and introduction . ISO 7961 :1 994, Aerospace — Bolts — Test methods . ISO 7966:1 993, Acceptance control charts . ISO 8258:1 991 , Shewhart control charts . ISO 9002:1 994, Quality systems — Model for quality assurance in production, installation and servicing . ISO/TR 1 3425:1 995, Guide for the selection of statistical methods in standardization and specification
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply. 3.1 production batch quantity of finished bolts, manufactured using the same process, from a single material cast (single heat of alloy), having the same number of definition document, same thread and diameter code, heat treated together to the same specified conditions and produced as one continuous run 3.2 inspection lot quantity of bolts from a single production batch having the same number of definition document 3.3 definition document document specifying directly or indirectly all the requirements for bolts NOTE The definition document may be an International Standard, an in-house standard or a drawing. 3.4 crack rupture in the material which may extend in any direction and which may be intercrystalline or transcrystalline in character 3.5 seam open surface defect 3.6 lap surface defect caused by folding over metal fins or sharp corners and then rolling or forging them into the surface 3.7 crevice hollow area at thread crest 3.8 inclusions non-metallic particles originating from the material manufacturing process NOTE These particles may be isolated or arranged in strings. 3.9 microstructural shearing shear banding V- or U-shaped rippled grain structure immediately below the thread root, or chevron-shaped rippled grain structure within the thread crest 3.10 sampling plan plan according to which one or more samples are taken in order to obtain information and to reach a decision, if possible NOTE In this International Standard, each sampling plan defines the number of bolts to be inspected as a function of the size of the batch and the acceptance number [number of defective items acceptable (Ac)] 1 ) . 3.11 simple random sampling sampling of n items from a population of N items in such a way that all possible combinations of n items have the same probability of being chosen 3.12 critical defect defect that, according to judgement and experience, is likely to result in hazardous or unsafe conditions for individuals using, maintaining, or depending upon the considered product (bolt), or that is likely to prevent performance of the function of a major end item