Overview
ISO 9418:1998 - Aerospace - Rivets, solid, in aluminium or aluminium alloys - Procurement specification - defines the characteristics and quality‑assurance requirements for solid aluminium rivets used in aerospace construction. The standard applies when referenced in a definition document (e.g., contract, drawing or product standard) and sets out inspection, testing, sampling and documentation rules that ensure rivet fitness for service in airframe assemblies.
Key Topics
- Scope and applicability: Requirements apply to solid rivets manufactured from aluminium or aluminium alloys when called out by a definition document.
- Manufacturer approval and quality system: Manufacturers are required to comply with quality assurance and approval procedures (referencing ISO 9002) to demonstrate consistent production of conforming rivets.
- Acceptance inspection & sampling: Detailed sampling plans for visual, dimensional, mechanical and metallurgical inspections are provided (based on ISO 2859-1). Batches are sampled at random and rejected lots must be re-submitted after corrective action.
- Mechanical tests: Includes double shear strength requirements by rivet diameter and alloy and specific sampling plans for shear testing. (Minimum shear strength values are tabulated in the standard.)
- Drivability: A standardized drivability test is specified to verify upset behavior and absence of cracks after setting.
- Metallurgical controls: Grain size requirements (referencing ASTM E112) and requirements for rivet wire samples and batch heat treatment consistency.
- Surface treatment, marking and packaging: Surface finish to product standard; durable labeling (designation, quantity, manufacturer, batch); packaging limits (single-batch packing, max mass guidance) and special labeling (e.g., warning for 2024 alloy requiring heat treatment before setting).
- Statistical process control (SPC): The standard permits use of SPC (with ISO/TR 13425 and control-chart standards ISO 7870/ISO 7966/ISO 8258) in lieu of final lot sampling if formally justified and validated.
- Records and certification: Test reports, records and certificates of compliance must be maintained (manufacturer retains batch documentation for a minimum period).
Applications
ISO 9418 is used by:
- Aerospace OEMs and tier‑1 suppliers specifying rivets on airframe drawings and procurement documents.
- Fastener manufacturers and quality engineers for production control, inspection and batch release.
- Procurement, receiving inspection and certification authorities verifying rivet conformity for structural assemblies.
Practical benefits include standardized acceptance criteria, reduced supply risk, traceability and compatibility with quality systems and SPC approaches.
Related Standards
- ISO 2859‑1 (sampling procedures)
- ISO/TR 13425 (statistical methods in standardization)
- ISO 9002 (quality assurance model referenced)
- ASTM E112 (grain size determination)
Keywords: ISO 9418, aerospace rivets, solid rivets, aluminium rivets, procurement specification, quality assurance, sampling plans, double shear strength, drivability, SPC.
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