Overview
ISO 7217:2023 - Titanium and titanium alloys - Bar, rod and billet - Technical delivery conditions defines the manufacturing and delivery requirements for solid wrought titanium and titanium alloy bars, rods and billets. It standardizes purchaser information, manufacturing processes, chemical composition reporting, mechanical properties, dimensional tolerances, surface condition, inspection, marking, packaging and certification to support consistent quality and global trade.
Key Topics
- Scope and definitions: differentiates bar/rod (solid product ≤ 10 000 mm) and billet (> 10 000 mm) with uniform cross-sections (round, square, rectangular, polygons).
- Information to be supplied by purchaser: quantity, designation, dimensions, packaging, inspection level, mill product certificate and optional certification.
- Manufacturing: typical routes include hot-working (hot rolling, forging, extrusion) with subsequent cold work, surface conditioning and heat treatment.
- Chemical composition: limits and reporting requirements are given in Table 1; intentional alloying elements must be declared and “other elements” reported above agreed thresholds. Referee analysis methods include ASTM E2371, ASTM E539, ASTM E1409 (O, N), ASTM E1447 (H) and ASTM E1941 (C); ISO methods may be cited for Fe and O.
- Mechanical properties: tensile property requirements and test-piece sampling are specified (references include ISO 6892-1 and ASTM E8/E8M).
- Dimensional tolerances & straightness: diameter, width, thickness, length and straightness tolerances with options for special tolerances when required.
- Surface condition & NDT: acceptance criteria for surface imperfections and guidance for non‑destructive testing (NDT) and NDT personnel qualification (see ISO 11484).
- Inspection, marking & documentation: inspection levels, mill product certificates, marking and packaging requirements to ensure traceability and conformity.
Applications
ISO 7217:2023 is used by:
- Manufacturers and mill operators to define production, testing and delivery processes for titanium bars, rods and billets.
- Procurement/specifiers and fabricators to create unambiguous purchase orders and acceptance criteria.
- Quality, inspection and certification bodies to perform and verify chemical and mechanical testing and issue mill product certificates.
- Design and engineering teams in sectors that rely on titanium semi-finished products - e.g., aerospace, medical devices, chemical processing, energy and marine - for consistent material supply and compliance.
Related Standards
Standards referenced in ISO 7217 include ISO 377, ISO 6892-1, ISO 10474, ISO 28401, ISO 11484 and ASTM methods (E8/E8M, E29, E139, E1409, E1447, E1941, E2371). These provide test methods, sampling and inspection frameworks that support the technical delivery conditions in ISO 7217.
Keywords: ISO 7217:2023, titanium, titanium alloys, bar, rod, billet, technical delivery conditions, chemical composition, tensile properties, dimensional tolerance, inspection, mill product certificate.
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