ISO 15484:2008

Overview

ISO 15484:2008 - "Road vehicles - Brake lining friction materials - Product definition and quality assurance" provides a structured quality‑assurance framework for disc brake pads and drum brake linings used on motor vehicles. The standard defines product quality preplanning across project phases (prototyping, production transfer and series monitoring), test plans, tolerance review, and documentation requirements such as the lining data sheet (LDS) and control plan (CP). It focuses on the finished component friction material and enables rapid, uniform assessment of brake linings for global customer–supplier relationships. Note: raw material checks and in‑process control are outside the scope.

Key topics and requirements

• Scope and focus: Applies to completed friction materials (disc pads and drum linings); advises avoiding apparent “system” tests that depend on the whole brake system.
• Phased product quality preplanning: Defines phases 1–7 from concept and prototyping through to ongoing series production monitoring and tolerance review.
• Test plan categories:
  • General (visual inspection, dimensional checks, underlayer distribution)
  • Physical properties (density, porosity, pH index, compressibility, shear strength, swell/growth, thermal transmission, eigenfrequency)
  • Corrosion (painted backing plates and shoe treatments, resistance to fluids)
  • Inertia dynamometer tests (friction performance and wear for passenger cars and commercial vehicles)
• Documentation and traceability: Results, tolerances and agreed specifications are recorded in the LDS; control plan defines sample sizes and test frequency during series production.
• Statistical approach: Tolerances established from prototype and initial series batch tests, with option for tolerance review based on batch trend analysis.

Practical applications and users

Who will use ISO 15484:2008:

• Brake friction material manufacturers - to establish product validation, production release and series monitoring procedures.
• Automotive OEMs and Tier‑1 suppliers - to specify acceptance criteria, verify supplier quality and harmonize global requirements.
• Test laboratories and quality engineers - to implement the recommended test plans and document LDS/CP records.
• Compliance and supplier auditors - to confirm that brake lining components meet agreed tolerances and performance metrics.

Practical benefits:

• Faster, consistent assessment of brake pads/linings across regions
• Clear handover criteria from development to series production
• Reduced test duplication via harmonized procedures and tolerance-based acceptance

Related standards

Normative references cited include ISO 6310, ISO 6312, ISO/PAS 22574, ISO 26867, ISO 27667, ISO 2812‑1, SAE J2707, SAE J2598, SAE J2694, SAE J2724, JASO C458‑86 and JIS D4421 - useful for specific test methods, corrosion evaluation and dynamometer procedures.