Technical materials such as carbon, titanium, special alloys, ceramics and rubber require permanent marking that preserves their functional properties without compromise. This marking is not simply an aesthetic process — it must serve as a reliable durable industrial identification solution, fully embedded within traceability processes and regulatory compliance frameworks (serial numbers, Data Matrix codes, UDI, etc.).
For materials operating under high-stress conditions, permanent marking must be carried out with exacting precision to maintain part integrity while avoiding any impact on mechanical performance.
Industrial marking technologies are selected according to both the material characteristics and the specific requirements of each application.
SIC MARKING provides a full range of permanent marking machines, including laser marking machines, dot peen marking machines, and scribing marking machines — each designed to meet the demands of technical materials and deliver marks that are durable, accurate and compliant with industrial traceability requirements.
Marking carbon composites (CFRP) requires a high level of technical proficiency. Laser marking of carbon parts is the established solution of choice, providing permanent, non-contact marking that maintains both the polymer matrix and fibre integrity.
In contrast, mechanical marking processes such as dot peen marking and scribing marking are strongly not recommended, due to the risks of delamination and crack development within the composite structure.
Laser marking of carbon produces marks that are durable, readable and compliant with the traceability and certification standards of the aerospace, medical and professional sports sectors.
Titanium, characterized by its high hardness, low thermal conductivity, reactivity at high temperatures and strong corrosion resistance, governs the selection and setup of permanent marking technologies — laser marking, dot peen marking or scribing.
Marking of titanium parts calls for very precise parameter control to manage thermal input and prevent heat-affected zones or crack initiation, while enabling — notably through laser annealing marking — high-contrast identification with no material removal. These capabilities ensure dependable, long-term traceability, fully meeting the compliance standards of the aerospace, medical and industrial sectors.
Dot peen marking technology is a widely used solution for titanium components in the aerospace sector.
Special alloys, including marking of Inconel parts, require permanent marking with a very high degree of precision, where material characteristics directly influence the marking technology selected: laser annealing marking to safeguard metallurgical integrity and the passive layer, dot peen marking for maximum durability under severe service conditions, and scribing marking for specific niche applications.
Process parameters must be validated on a component-by-component basis to avoid heat-affected zones, fracture initiation or micro-cracking, and to ensure mark readability and mechanical performance across the full service life.
In the aerospace, medical and energy sectors, permanent marking is a critical qualification step. It covers testing, contrast checking and alignment with traceability standards (Datamatrix DPM, UDI), while requiring precise control of laser parameters (power, frequency, energy) to limit heat accumulation, document settings and ensure regulatory compliance and operational performance.
Ceramics, given their extreme hardness, low fracture toughness and limited thermal conductivity, demand non-contact permanent marking with carefully controlled energy input. Laser marking is the preferred marking technology, applying short pulses with managed power and frequency to prevent chipping, cracking and heat-affected zones.
Parameters and wavelength must be adapted to each ceramic grade (alumina, zirconia, nitrides, carbides), with component-specific qualification trials to confirm a repeatable and non-destructive process.
Regulatory and functional requirements (medical — UDI, aerospace, electronics) make marking qualification a necessity: Datamatrix DPM codes and serial numbers must remain legible over time without affecting the mechanical properties of the ceramic component. Validation protocols combining visual checks, mechanical testing and traceability records ensure lasting mark readability and functional integrity throughout the service life of the part.
Rubber presents distinct marking challenges: its high elasticity and sensitivity to heat rule out aggressive mechanical marking methods, while poorly controlled energy delivery risks localized material damage. Low-energy laser marking is the recommended solution, with tailored process parameters and qualification trials adapted to each compound (EPDM, NBR, silicone, FKM), ensuring long-term traceability without affecting sealing capability or the mechanical properties of the part.
Rubber combines high elasticity (elongation at break generally between 200 and 800%), low stiffness, limited thermal conductivity and a pronounced sensitivity to heat. These characteristics call for marking processes that apply no mechanical stress to the component.
Permanent marking behaviour varies considerably depending on compound formulation and filler content — particularly carbon black — making material-specific trials essential to achieve the required contrast, environmental durability and regulatory compliance, while preserving functional integrity and sealing performance.
The selection of marking technology depends on the compatibility between the material, energy applied and acceptable mechanical constraints.
Non-contact laser marking is the preferred choice for sensitive materials — carbon composites (CFRP), technical ceramics and elastomers — avoiding any mechanical stress or risk of functional damage.
Dot peen marking (DP) is chosen when deep and highly durable marks are needed, particularly on alloys used in demanding service environments (Inconel, Monel), or where long-term mark retention is a key requirement. Dot peen marking is also applied for precise, low-impact marking of aerospace parts, with controlled indentation to prevent crack initiation.
Discover our flagship equipment for laser marking, micro-percussion, or scribing marking, including our Portable Machines, Marking Modules Integrable on Production Lines, or Standalone Marking Stations.
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