EN 4057-301:2005

Overview

EN 4057-301:2005 is a CEN/AECMA aerospace test method that defines the procedure to determine the resistance to salt mist of cable ties with metallic locking devices. The standard is intended to be used together with EN 4057-100 (general test provisions) and references the salt mist chamber procedure in EN 2591-307.

This part focuses on practical verification of corrosion resistance and post-exposure mechanical performance to ensure cable ties remain fit for use in aerospace harness environments.

Key Topics

• Scope: Procedure for salt mist exposure of cable ties that include metallic locking devices; evaluates corrosion impact on subsequently measured mechanical strength.
• Referenced methods: Uses the salt mist conditions described in EN 2591-307 and the loop tensile strength measurement described in EN 4057-401.
• Specimen mounting: Specimens shall be flat and placed in the test cabinet "at an angle of (20 205+−) ° vertical, with the head in the highest position." Supports must be inert, non-metallic materials.
• Exposure duration: Specimens are subjected to the salt mist test for 30 h according to EN 2591-307 without pre-conditioning.
• Drying and conditioning: After exposure, specimens are dried at (24 ± 2) °C and (50 ± 5) % relative humidity for the time period appropriate to strap thickness (see table below):
  • Strap thickness ≤ 1,17 mm: 7 days
  • Strap thickness 1,18 to 1,40 mm: 14 days
  • Strap thickness 1,41 to 2,11 mm: 28 days
• Post-test evaluation: After the recovery period, specimens shall be tested using the loop tensile strength test of EN 4057-401. The specimen must meet the loop tensile strength requirements specified in the relevant product standard.

Applications

This standard is directly applicable to:

• Aerospace harness manufacturers and quality engineers validating corrosion resistance of cable ties with metallic locks.
• Suppliers specifying acceptance tests for cable ties used in airframe wiring harnesses and other avionics installations.
• Maintenance and procurement teams requiring proven durability and predictable mechanical performance after corrosive exposure.

Benefits include clearer acceptance criteria for corrosion resistance, consistent laboratory procedures for salt mist exposure, and alignment with other aerospace test methods.

Related Standards

• EN 4057-100 - Cable ties for harnesses - Test methods - Part 100: General (use in conjunction)
• EN 2591-307 - Elements of electrical and optical connection - Test methods - Part 307: Salt mist (defines chamber conditions)
• EN 4057-401 - Cable ties for harnesses - Test methods - Part 401: Loop tensile strength (post-test mechanical verification)

For compliance and product qualification, follow EN 4057-301:2005 together with the referenced EN parts to ensure consistent, traceable testing and reliable performance of cable ties in corrosive aerospace environments.