EN 4372:2009

Overview

EN 4372:2009 is a European standard developed by CEN, specifying requirements for a heat resisting nickel alloy with copper, designated NI-PD9001 (NiCu31), in the form of wire intended for solid rivets with diameters up to 10 mm. This standard is part of the aerospace series targeting metallic materials used in aerospace applications. The document focuses on ensuring the quality, composition, mechanical properties, testing methods, and production processes for wires used in critical aerospace fastening components.

Key Topics

• Material Specification
  The standard defines the chemical composition of the nickel alloy with copper NI-PD9001, including minimum and maximum allowable elemental percentages such as:

  • Nickel + Cobalt (min. 63%)
  • Copper (28% to 34%)
  • Iron, Manganese, Silicon, Aluminum, Carbon, Sulfur, and other trace elements with specified limits.

• Wire Properties and Dimensions
  The wire is cold drawn and produced with a maximum diameter of 10 mm, suitable for solid rivet manufacturing. The delivery condition of the wire is recrystallized annealed to ensure optimal mechanical properties.

• Mechanical and Physical Requirements
  The standard specifies critical mechanical properties required at ambient temperature, including:

  • Tensile strength (530 to 620 MPa)
  • Proof stress, elongation (≥ 25% over 50 mm gauge length)
  • Shear strength (minimum 340 MPa based on ASTM B565 test method) Additional testing includes bending, wrapping, dimensional inspections, and visual checks for external defects.

• Testing and Compliance
  EN 4372 references several complementary standards for test methods such as:

  • EN 2002-001 for tensile testing
  • EN 2032-2 for metallurgical coding
  • ASTM B565 for shear strength testing
    These ensure that materials conform to rigorous aerospace standards and maintain reliability under high-stress conditions.

Applications

EN 4372:2009 is specifically targeted at the aerospace industry for the production of solid rivets used in aircraft assembly and maintenance. Wires manufactured under this standard provide critical materials that ensure:

• Heat resistance for operations involving elevated temperature environments during aircraft service.
• Robust mechanical performance for structural joints that must sustain fatigue, vibration, and mechanical loads.
• Consistent quality and dimensional accuracy to meet strict aerospace manufacturing tolerances.

This standard offers manufacturers and designers a reliable reference for choosing materials that enhance the safety and durability of aerospace structures, supporting mission-critical performance needs.

Related Standards

• EN 4258: General organization of aerospace metallic material standardization series.
• EN 4500-3: Rules for drafting and presentation of aerospace metallic material standards with emphasis on heat-resisting alloys.
• EN 4700-4: Technical specification for steel and heat-resisting alloy wrought wires-applicable for inspection and testing of wire products.
• EN 2002-001: Metallic material tensile testing methods at ambient temperature.
• EN 2032-2: Metallurgical coding for aerospace metallic materials in delivery condition.
• ASTM B565: Standard test method used internationally for shear testing rivets and cold-heading wires.

Keywords: EN 4372:2009, aerospace nickel alloy wire, NI-PD9001, heat resisting alloy, solid rivet wire, nickel-copper alloy, aerospace rivet wire standard, mechanical properties nickel alloy, aerospace wire testing, solid rivet specifications, aerospace fasteners, CEN standards aerospace alloys.