SIST EN 2341:2019

Overview

SIST EN 2341:2019 is a European standard developed by CEN that specifies the dimensions and characteristics of aluminium and aluminium alloy square and rectangular extruded bars used in the aerospace industry. This standard ensures uniformity and quality for structural components essential in aerospace construction, promoting safety, reliability, and interoperability across European aerospace manufacturers.

The document outlines precise preferred dimensions, tolerances, designations, and technical specifications for aluminium extrusions that meet aerospace quality demands. SIST EN 2341:2019 supports manufacturers and purchasers by providing clear guidelines for aluminum bar dimensions and mechanical properties, facilitating efficient procurement and compliance.

Key Topics

• Material Scope: Covers aluminium and aluminium alloys specifically for square and rectangular extruded bars suitable for aerospace applications.
• Preferred Dimensions: Detailed tabulation of thickness and width dimensions including tolerances and mass per meter values. Dimensions range from small bars (e.g., 6x6 mm) to large sections (e.g., 200x220 mm).
• Tolerance Specifications:
  • Length tolerance varies based on bar size.
  • Flatness and longitudinal twist tolerances as per EN 2066.
• Designation Elements: Bars are designated by material name, material standard number, physical dimensions, and dimensional standard reference.
• Technical Compliance: Bars must meet requirements outlined in EN 2070-1 (general requirements) and EN 2070-3 (bar and section technical specifications).

Applications

SIST EN 2341:2019 bars are widely used in aerospace construction where high-strength, lightweight, and reliable aluminium components are critical. Typical aerospace uses include:

• Structural frameworks in aircraft and spacecraft
• Precision machined parts and assemblies
• Aerospace components requiring strict dimensional accuracy and material certification
• Replacement and repair parts for aerospace manufacturers adhering to standardized aluminium extrusion sizes

By adhering to SIST EN 2341:2019, manufacturers can ensure components meet industry-recognized dimensional standards and tolerances, leading to improved part interchangeability and optimized manufacturing processes.

Related Standards

Compliance with SIST EN 2341:2019 often requires cross-reference to complementary aerospace material and manufacturing standards, including:

• EN 2066: Aerospace series for extruded aluminium sections – General tolerances covering dimensional accuracy, flatness, and twist.
• EN 2070-1: Aerospace series – Aluminium and aluminium alloy wrought products general requirements.
• EN 2070-3: Aerospace series – Aluminium and aluminium alloy wrought products bar and section specifications.

Additional referencing to ISO and IEC terminologies is encouraged to maintain consistency in technical communication throughout aerospace standardization.

By implementing SIST EN 2341:2019, aerospace manufacturers benefit from high-quality extruded aluminium bars with standardized dimensions and stringent quality controls-essential for precision, safety, and performance in aerospace applications. This standard supports international trade, regulatory compliance, and the advancement of aerospace manufacturing technologies.