The manufacturing journey at Tabarestan Steel Foundry (TSF) concludes with a rigorous validation phase. Following the successful completion of the final inspection and the subsequent approval by the TSF Quality Control Unit, third-party inspectors, or the customer’s designated representative, the product is deemed ready for delivery.

To formalize this approval, TSF issues a comprehensive Quality Certificate, often referred to in the industry as the "Final Book".This document is the component's "passport," serving as irrefutable proof of quality and compliance.

Compliance with DIN EN 10204

Crucially, this certificate is prepared in strict accordance with the DIN EN 10204 standard. This ensures full traceability and adherence to European and international norms for metallic products. The Final Book consolidates all individual test reports, certifying that the supplied products meet the agreed acceptance criteria, technical specifications, and contractual standards.

Scope of Verification: A Comprehensive Data Package

Depending on the specific requirements of the technical contract, the Quality Certificate provides a granular breakdown of the component's properties. It may include one or more of the following detailed test results:

1. Material Composition & Structure

• Chemical Analysis: Precise verification of the material's elemental composition via spectrometry to ensure alloy compliance.
• Metallography: Microstructural evaluation of the material to confirm grain size, phase distribution, and heat treatment effectiveness.

2. Geometric & Visual Integrity

• Dimensional Control: Precision measurement of all critical part dimensions to ensure geometric accuracy and fit.
• Visual Examination: A thorough inspection of the surface finish and overall appearance to ensure the absence of surface defects.

3. Mechanical Properties: A detailed report on how the material behaves under stress, including:

• Yield Point (Y.P): The stress at which the material begins to deform plastically.
• Ultimate Tensile Strength (UTS): The maximum stress the material can withstand while being stretched.
• Elongation (El): A measure of the material's ductility before fracture.
• Impact Resistance: Evaluation of the material's toughness and ability to absorb energy (Charpy impact test).
• Hardness Testing: Assessment of material hardness levels (Brinell, Rockwell, or Vickers) to verify wear resistance.

4. Non-Destructive Testing (NDT) Verifying internal and surface integrity without damaging the component, utilizing:

• PT (Liquid Penetrant Test): For detecting surface-breaking defects.
• UT (Ultrasonic Test): For detecting deep internal flaws.
• MT (Magnetic Particle Test): For identifying surface and near-surface discontinuities.
• RT (Radiographic Test): X-ray or Gamma-ray imaging for volumetric internal inspection.

5. Operational Integrity

• Hydrostatic Testing: Pressure integrity verification to ensure the component is leak-proof and capable of withstanding operational pressures.