EN 3315:2018

Overview

EN 3315:2018 is a European aerospace material standard that defines requirements for titanium alloy TI‑P64001 supplied as solution‑treated and aged forgings with an external diameter (De) of ≤ 75 mm. Prepared under the ASD‑STAN/CEN process, the standard is part of the EN aerospace metallic materials series and is intended for use in aerospace component manufacture where controlled chemistry, heat treatment and mechanical performance are required.

Key Topics

• Material and condition: Specifies the titanium alloy designation TI‑P64001 in the solution‑treated and aged condition for forgings.
• Form and size: Applies to forgings produced from forging stock, with maximum external diameter (De) ≤ 75 mm.
• Chemical composition: Limits for alloying elements are defined (for example, aluminium and vanadium ranges are given) along with controls for interstitials and impurities.
• Heat treatment: Prescribes the delivery condition as solution treated and aged; an alternative solution temperature option (beta‑transus minus 30 °C) is noted.
• Mechanical requirements and tests: Includes requirements for tensile properties (proof stress Rp0.2, ultimate tensile strength Rm, elongation A, reduction of area Z), hardness and routine inspections. Test piece direction, dimensional and marking inspections refer to EN 2858‑3.
• Quality and acceptance: External defect inspection, marking and dimensional checks follow EN 2858‑3. Product qualification programs and additional specifications are to be agreed between manufacturer and purchaser.
• Normative references: Key linked standards include EN 2858‑3 (forging technical specification), EN 3313 (forging stock), EN 4258 and EN 4500‑004.

Applications

• Aerospace structural and engine components where high strength‑to‑weight and specific heat‑treated titanium properties are required.
• Suitable for machined forged parts, fittings, fastener blanks, small-diameter shafts and other critical aerospace forgings within the size limit.
• Used by: material suppliers, forging manufacturers, aerospace OEMs, design and materials engineers, procurement and quality assurance teams, and certification bodies involved in aerospace part approval.

Practical value

• Ensures consistent chemical and mechanical performance of TI‑P64001 forgings in the solution‑treated and aged condition.
• Simplifies procurement and acceptance by referencing established test methods and inspection criteria.
• Helps designers and manufacturers select appropriate material and heat‑treatment controls for critical aerospace forgings.

Related Standards

• EN 2858‑3 - Aerospace series: Titanium and titanium alloys - Forging stock and forgings - Part 3: Pre‑production and production forgings (technical specification)
• EN 3313 - TI‑P64001 forging stock for solution treated and aged forgings
• EN 4258, EN 4500‑004 - Organization and drafting rules for aerospace metallic material standards

Keywords: EN 3315:2018, TI‑P64001, titanium alloy, solution treated and aged, aerospace forgings, EN standards, mechanical properties, heat treatment.