EN 3643:1996

Overview

EN 3643:1996 is a European standard issued by CEN that defines the specifications for solid rivets used in aerospace applications. This standard specifically covers 100° countersunk normal head rivets made from titanium TI-PO2 material, which are anodized and measured in inch-based dimensions. These rivets are designed for use in environments with a maximum operating temperature of 315°C. The titanium alloy and anodizing process ensure enhanced corrosion resistance and mechanical strength, making these rivets highly suitable for critical aerospace structural assembly.

Key Topics

• Type of Rivets: Solid rivets with a 100° countersunk normal head profile.
• Material Specification: Titanium TI-PO2, chosen for its excellent strength-to-weight ratio and corrosion resistance.
• Surface Treatment: Anodizing is applied to improve durability and resistance to environmental factors.
• Dimensional Series: Inch-based sizing system to maintain compatibility with aerospace components designed in imperial units.
• Temperature Resistance: Certified for applications up to 315°C maximum operating temperature.
• Application Sector: Aerospace industry, ensuring high reliability and performance under demanding conditions.

Applications

EN 3643:1996 rivets are widely used in the aerospace sector where lightweight, strong, and corrosion-resistant fastening solutions are critical. Common practical applications include:

• Aircraft Structures: Assembly of airframes, control surfaces, and fuselage panels that require flush fastening for aerodynamic efficiency.
• Engine Components: Fastening parts exposed to elevated temperatures where titanium’s thermal resistance is advantageous.
• Spacecraft Assemblies: Use in satellite or space vehicle construction where reliability under extreme environmental conditions is essential.
• Military Aviation: Structurally critical joints requiring durable and lightweight fixing elements.

The specification ensures uniformity and interchangeability, important for maintenance and production in aerospace manufacturing.

Related Standards

The EN 3643:1996 standard aligns with other aerospace fastener and material standards, complementing industry requirements such as:

• EN 3660 - Rivets for aerospace in other materials or head styles.
• EN 9100 - Quality management systems for aerospace manufacturing.
• ISO 4268 - Standard for countersunk head rivets in various materials.
• MIL-R-xxxx - US military specifications for titanium rivets, which may be cross-referenced for equivalent performance.

These linked standards collectively support the design, testing, certification, and usage of aerospace fasteners that must meet strict safety and performance criteria.

Adhering to EN 3643:1996 ensures aerospace manufacturers and maintenance teams benefit from proven solid rivet designs with predictable mechanical and environmental performance. The use of anodized titanium countersunk rivets per this standard provides an optimal blend of lightweight construction, corrosion resistance, and thermal tolerance essential for modern aerospace engineering.