SIST EN 2815:2009

Overview

SIST EN 2815:2009 is a European Standard published by CEN that specifies stringent requirements for Steel FE-PM1802 (X5CrNiCu15-5), designed specifically for aerospace applications. This grade of stainless steel is characterized by its consumable electrode remelted production method and undergoing both solution and precipitation heat treatments. The standard covers bars for machining with cross-sectional dimensions (diameter or thickness) not exceeding 200 mm. It demands a minimum tensile strength (Rm) of 965 MPa, ensuring superior mechanical properties suited for critical aerospace components.

This standard supports quality assurance in the aerospace sector, harmonizing expectations across European member countries and promoting safety, reliability, and performance within the industry.

Key Topics

• Material Specification: Defines chemical composition limits for elements such as Carbon (C), Silicon (Si), Manganese (Mn), Phosphorus (P), Sulfur (S), Chromium (Cr), Molybdenum (Mo), Nickel (Ni), Copper (Cu), Niobium + Tantalum (Nb + Ta), and Iron (Fe).
• Production Method: Steel must undergo consumable electrode remelting (C.E.R) to achieve high purity and enhanced mechanical properties.
• Heat Treatment: Two main treatment conditions are specified:
  • Solution Treated (W): Heat treatment between 1025°C and 1055°C with controlled cooling.
  • Solution + Precipitation Treated (U): Additional aging at 580–610°C for at least 4 hours to optimize strength and toughness.
• Mechanical Properties:
  • Minimum tensile strength (Rm) ≥ 965 MPa.
  • Proof stress (Rp0.2) ≥ 790 MPa.
  • Elongation (A) and reduction of area (Z) thresholds ensure ductility and formability.
  • Hardness limited to a maximum of 363 HB to balance wear resistance and machinability.
  • Impact toughness criteria to withstand operational stresses.
• Dimensions: Bars with diameter or thickness not exceeding 200 mm to suit machining processes.
• Testing and Inspection: Includes chemical composition tests, microstructure analysis with ferrite content limits, dimensional and visual inspections, cleanliness, and defect evaluations based on EN 4700-002 and EN 4436 standards.
• Standard Compliance: Adherence to related aerospace materials and heat treatment standards, ensuring consistent quality and traceability.

Applications

SIST EN 2815:2009 steel bars are primarily intended for high-performance aerospace components where exceptional mechanical strength, corrosion resistance, and durability are essential. Typical applications include:

• Structural components in aircraft and spacecraft subjected to high stress and cyclic loading.
• Machined parts requiring precise dimensions and superior surface quality.
• Components exposed to aggressive environments necessitating stainless steel properties with enhanced strength from heat treatment.
• Aerospace fasteners, shafts, fittings, and supports integral to safety-critical systems.

The material’s optimized combination of strength, toughness, and corrosion resistance makes it ideal for the demanding requirements of aerospace manufacturing, ensuring reliability and long service life.

Related Standards

• EN 2043: Aerospace series - Metallic materials - General requirements for semi-finished product qualification (excluding forgings and castings).
• EN 4258: Aerospace series - General organization of standardization - Framework and linkage between standard types.
• EN 4436: Aerospace series - Steel - Test methods for determination of δ ferrite content, ensuring microstructural integrity.
• EN 4500-5: Aerospace series - Rules for drafting and presentation of metallic material standards - Part 5: Specific rules for steels.
• EN 4700-002: Aerospace series - Steel and heat-resisting alloy - Wrought products - Specifications for bars and sections.

These related standards support comprehensive material qualification, testing, and traceability, fostering consistency within aerospace supply chains.

Keywords: SIST EN 2815:2009, aerospace steel standard, FE-PM1802, X5CrNiCu15-5, consumable electrode remelted steel, precipitation treated steel, solution treated steel, high strength steel bar, aerospace stainless steel, machining bar, tensile strength steel, aerospace material standard, CEN aerospace standards.