Technical materials such as carbon, titanium, special alloys, ceramics and rubber require permanent marking that in no way compromises their functional properties. This marking goes beyond purely aesthetic engraving — it must be understood as a means of durable industrial identification, embedded within traceability processes and regulatory compliance requirements (serial numbers, Data Matrix codes, UDI, etc.).
For materials subject to demanding operational conditions, permanent marking must be carried out with strict precision to preserve the integrity of the part without compromising its mechanical properties.
Industrial marking technologies are selected according to the material type and specific application requirements.
SIC MARKING offers a comprehensive range of permanent marking machines, including laser marking machines, dot peen marking machines, and scribing marking machines — each engineered to meet the specific demands of technical materials, delivering marks that are durable, precise and fully compliant with industrial traceability standards.
Marking of carbon composites (CFRP) demands a high level of technological expertise. Laser marking of carbon parts is the recognised reference solution, as it delivers permanent, non-contact marking that preserves both the polymer matrix and the integrity of the fibres.
Conversely, mechanical marking processes such as dot peen marking and scribing marking are strongly inadvisable, due to the risks of delamination and crack initiation.
Laser marking of carbon ensures a mark that is durable, machine-readable and compliant with the traceability and certification requirements of the aerospace, medical and professional sports sectors.
Titanium, owing to its high hardness, low thermal conductivity, reactivity at elevated temperatures and outstanding corrosion resistance, directly determines the selection and configuration of permanent marking technologies — whether laser marking, dot peen marking or scribing.
Marking of titanium components requires extremely precise parameter settings to control heat input and prevent any heat-affected zones or crack initiation, whilst enabling — notably through laser annealing marking — the achievement of high contrast marks with no material removal. These characteristics ensure reliable, long-term traceability, fully compliant with the stringent requirements of the aerospace, medical and industrial sectors.
Dot peen marking technology is widely specified for titanium parts within the aerospace sector.
Special alloys, including marking of Inconel components, demand permanent marking of the highest precision, where the material properties directly govern the marking technology selected: laser annealing marking to preserve metallurgical integrity and the passive layer, dot peen marking for maximum durability in harsh operating environments, and scribing marking reserved for targeted applications.
Parameter settings must be validated on a part-by-part basis to prevent heat-affected zones, crack initiation or micro-cracking, and to ensure both readability and mechanical integrity throughout the full service life of the component.
In the aerospace, medical and energy sectors, permanent marking becomes a critical qualification process. It encompasses testing, contrast verification and compatibility with traceability standards (Datamatrix DPM, UDI), whilst requiring full command of laser parameters (power, frequency, energy) to limit thermal accumulation, document process settings and ensure both regulatory compliance and in-service performance.
Ceramics, owing to their extreme hardness, low fracture toughness and poor thermal conductivity, require non-contact permanent marking with strictly controlled energy input. Laser marking stands as the reference marking technology, utilising short pulses with controlled power and frequency to prevent chipping, cracking and heat-affected zones.
Parameters and wavelength must be tailored to each ceramic formulation (alumina, zirconia, nitrides, carbides), with part-by-part trials required to validate a reproducible, non-destructive process.
Regulatory and functional requirements (medical — UDI, aerospace, electronics) make marking qualification essential: Datamatrix DPM codes and serial numbers must remain legible over time without degrading the mechanical properties of the ceramic component. Validation protocols incorporating visual inspection, mechanical testing and full traceability ensure long-term readability and functional integrity of the part throughout its entire service life.
Rubber presents specific marking challenges: its high elasticity and heat sensitivity rule out aggressive mechanical marking processes, whilst poorly controlled energy input can cause localised material degradation. Low-energy laser marking is therefore the preferred approach, with precise parameter settings and qualification trials tailored to each compound (EPDM, NBR, silicone, FKM), ensuring long-term traceability without compromising the sealing performance or mechanical properties of the component.
Rubber combines high elasticity (elongation at break typically between 200 and 800%), low stiffness, limited thermal conductivity and marked thermal sensitivity. These characteristics demand marking processes that impose no mechanical stress on the part.
Behaviour under permanent marking varies significantly depending on the compound formulation and filler content — particularly carbon black — making targeted material trials essential to guarantee contrast, resistance to environmental stresses and regulatory compliance, whilst preserving functional integrity and sealing performance.
The selection of the marking technology is determined by the match between the material, the applied energy and the allowable mechanical stress.
Non-contact laser marking is the preferred solution for sensitive materials — carbon composites (CFRP), technical ceramics and elastomers — to prevent any mechanical stress or functional degradation.
Dot peen marking (DP) is specified when deep and highly durable marks are required, particularly on alloys exposed to severe operating environments (Inconel, Monel), or where long-term mark retention is critical. Dot peen marking is also employed for light, precise marking of aerospace components, providing controlled indentation depth to prevent crack initiation.
Discover our leading equipment for laser marking, dot peen marking or scribing marking, across our range of portable machines, production line integrated marking modules or standalone marking stations.
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