Industrial marking on metals allows for the permanent identification of parts, components, plates, tools, subassemblies, and products made of steel, stainless steel, aluminum, brass, titanium, copper, cast metal, or other metal alloys.
Metals can be marked industrially using mechanical or laser technologies, provided that the marking machine, parameters, and reading or verification system are selected correctly. In practice, it is possible to mark a wide variety of metallic materials, although each requires different technical considerations.
Metals are one of the most common material groups used in industrial marking. They are used in the automotive, aerospace, rail, steel, oil and gas industries, and more. However, not all metals behave the same way when it comes to marking.
Hardness, composition, thermal conductivity, surface finish, roughness, coatings, and the part’s geometry directly influence the choice of technology.
The key question is not just whether a metal can be marked, but which technology produces a mark that is legible, durable, and suitable for the application. A machined steel part, an anodized aluminum plate, a brass valve, a titanium component, or a cast housing may each require different marking solutions.
At COUTH, we develop industrial marking and traceability solutions using Dot peen marking marking, scribing, and laser technologies. The selection of the appropriate marking machine must be based on the metal, the part, the type of identification, the required depth, contrast, legibility, the reading system, and actual production conditions.
The main technologies used for marking metals are Dot peen marking , scribing, and laser. Each acts differently on the metal surface:
Laser marking modifies the surface using concentrated energy, without mechanical contact.
Dot peen marking marking creates a permanent mark through controlled impacts.
Scribing produces a continuous incision on the material.
Which Metals Can Be Marked Industrially
Metals can be marked industrially using mechanical or laser technologies, provided that the marking machine, parameters, and reading or verification system are selected correctly. In practice, it is possible to mark a wide variety of metallic materials, although each requires different technical considerations.
Among the most common metals are:
Steel is one of the most common materials in industrial marking. It is used in machined parts, structural components, tools, jigs, machinery, chassis, transmission components, plates, flanges, brackets, and industrial subassemblies.
Steel is well-suited for Dot peen marking, scribing, and laser marking technologies. Its response depends on the alloy, carbon content, heat treatment, hardness, and surface finish. Mild steel, hardened steel, and high-hardness machined steel do not respond in the same way.
The following can be marked on steel:
The Dot peen marker is typically well-suited for robust steel parts when a permanent, durable mark with low operating costs is required. It is especially useful for serial numbers, part numbers, lot numbers, and traceability codes on industrial components.
The scribe marker is recommended when a deep, continuous mark with low noise levels is required. It may be suitable for plates, large parts, alphanumeric references, and components where the aesthetics of a continuous line are important.
The laser marker is suitable when high definition, contactless marking, small DataMatrix codes, logos, or marks of superior visual quality are desired. It may also be recommended when the part must not be mechanically deformed.
Stainless steel is used in environments where corrosion resistance, cleanliness, durability, or a good surface finish are required. It is common in industrial machinery, the food industry, the chemical industry, the energy sector, medical technology, precision components, nameplates, and equipment subjected to cleaning or harsh environments.
Stainless steel can be marked using Dot peen marking, engraving, or laser marking, but it requires special attention when there are requirements for corrosion resistance, surface finish, or cleanliness. The mark must not compromise the part’s functionality or cause problems in applications where the surface has hygienic or anti-corrosion requirements.
The following can be marked on stainless steel:
The laser marker is often particularly recommended when a clean, precise, high-definition, and non-contact mark is desired. It may be suitable for 2D codes, nameplates, visible components, precision parts, and applications where surface finish is important.
Dot peen marking may be suitable for robust stainless steel parts that require a permanent mark created by deformation. It must be verified if the part has strict requirements for finish, hygiene, or corrosion resistance.
Scribing can be used when a deep, continuous, and quiet mark is required on stainless steel parts that can withstand mechanical incision.
Aluminum is a lightweight metal widely used in aerospace, automotive, electronics, machinery, plates, profiles, housings, and machined parts. Its low density, good machinability, and ability to be anodized make it a common material for industrial applications.
Aluminum is softer than other industrial metals, so mechanical marking technologies must be adjusted to prevent unwanted deformation. Additionally, it has high thermal conductivity, which affects laser marking. On anodized aluminum, the laser can produce high-contrast marks by modifying or removing the anodized layer.
The following can be marked on aluminum:
The laser marker is generally well-suited for aluminum, especially when working on anodized aluminum, plates, precision components, or 2D codes. It produces sharp, high-contrast marks without mechanical contact.
Dot peen marking can be used on sturdy aluminum parts, provided that the force is controlled to prevent excessive deformation. It is suitable for permanent identification on machined parts, plates, or industrial components.
Scribing may be viable on aluminum when a deep, linear mark is needed, although penetration must be controlled to avoid damaging thin or delicate parts.
Brass is an alloy of copper and zinc used in valves, fittings, accessories, hydraulic components, decorative parts, plates, connectors, and technical components. Its good machinability makes it a common choice for precision parts and industrial components.
Brass generally responds well to both mechanical and laser marking technologies, although the result depends on the alloy’s composition and surface finish. It can be marked by deformation, incision, or surface modification.
The following can be marked on brass:
The laser marker is suitable when precision, high visual quality, or fine detail is required. It can be useful for nameplates, visible components, or parts with aesthetic requirements.
Dot peen marking is suitable for permanent and functional markings on robust brass parts.
Scribing may be recommended when a deep, continuous, and legible mark is needed, especially for alphanumeric text, part numbers, or nameplates.
Titanium is used in high-performance applications due to its strength-to-weight ratio, corrosion resistance, and use in demanding sectors such as aerospace, energy, technical applications, and specialty components.
Titanium requires careful selection of marking technology. It can be marked using laser, Dot peen marking, or scribing, but the part’s functional requirements, finish, end use, and potential sensitivity to thermal or mechanical effects must be considered.
The following can be marked on titanium:
A laser marker is generally recommended when precision, non-contact operation, high definition, and process control are required. It is particularly useful for codes, fine text, and high-value components.
Dot peen marking may be viable on robust titanium parts if the application allows for surface deformation and the depth is validated.
Scribing can be used in specific cases where a continuous mark is required and the part can withstand incision, although this must be carefully validated.
B CopperB is used in electrical components, connectors, busbars, electronic parts, power systems, thermal components, and elements where electrical or thermal conductivity is essential.
Copper has high thermal conductivity and high reflectivity, which can particularly affect laser marking. However, it can be marked industrially if the appropriate parameters are selected. Mechanical marking technologies may also be viable for robust parts.
The following can be marked on copper:
A laser marker may be suitable when absorption, contrast, and mark stability are verified. It is useful for precision components or when contactless marking is required.
Dot peen marking can be used on robust copper parts when permanent identification through deformation is needed.
Scribing may be suitable for text, part numbers, or deep marks on parts that can be incised.
Steel is one of the most common materials in industrial marking. It is used in machined parts, structural components, tools, jigs, machinery, chassis, transmission components, plates, flanges, brackets, and industrial subassemblies.
Steel is well-suited for Dot peen marking, scribing, and laser marking technologies. Its response depends on the alloy, carbon content, heat treatment, hardness, and surface finish. Mild steel, hardened steel, and high-hardness machined steel do not respond in the same way.
The following can be marked on steel:
The Dot peen marker is typically well-suited for robust steel parts when a permanent, durable mark with low operating costs is required. It is especially useful for serial numbers, part numbers, lot numbers, and traceability codes on industrial components.
The scribe marker is recommended when a deep, continuous mark with low noise levels is required. It may be suitable for plates, large parts, alphanumeric references, and components where the aesthetics of a continuous line are important.
The laser marker is suitable when high definition, contactless marking, small DataMatrix codes, logos, or marks of superior visual quality are desired. It may also be recommended when the part must not be mechanically deformed.
Stainless steel is used in environments where corrosion resistance, cleanliness, durability, or a good surface finish are required. It is common in industrial machinery, the food industry, the chemical industry, the energy sector, medical technology, precision components, nameplates, and equipment subjected to cleaning or harsh environments.
Stainless steel can be marked using Dot peen marking, engraving, or laser marking, but it requires special attention when there are requirements for corrosion resistance, surface finish, or cleanliness. The mark must not compromise the part’s functionality or cause problems in applications where the surface has hygienic or anti-corrosion requirements.
The following can be marked on stainless steel:
The laser marker is often particularly recommended when a clean, precise, high-definition, and non-contact mark is desired. It may be suitable for 2D codes, nameplates, visible components, precision parts, and applications where surface finish is important.
Dot peen marking may be suitable for robust stainless steel parts that require a permanent mark created by deformation. It must be verified if the part has strict requirements for finish, hygiene, or corrosion resistance.
Scribing can be used when a deep, continuous, and quiet mark is required on stainless steel parts that can withstand mechanical incision.
Aluminum is a lightweight metal widely used in aerospace, automotive, electronics, machinery, plates, profiles, housings, and machined parts. Its low density, good machinability, and ability to be anodized make it a common material for industrial applications.
Aluminum is softer than other industrial metals, so mechanical marking technologies must be adjusted to prevent unwanted deformation. Additionally, it has high thermal conductivity, which affects laser marking. On anodized aluminum, the laser can produce high-contrast marks by modifying or removing the anodized layer.
The following can be marked on aluminum:
The laser marker is generally well-suited for aluminum, especially when working on anodized aluminum, plates, precision components, or 2D codes. It produces sharp, high-contrast marks without mechanical contact.
Dot peen marking can be used on sturdy aluminum parts, provided that the force is controlled to prevent excessive deformation. It is suitable for permanent identification on machined parts, plates, or industrial components.
Scribing may be viable on aluminum when a deep, linear mark is needed, although penetration must be controlled to avoid damaging thin or delicate parts.
Brass is an alloy of copper and zinc used in valves, fittings, accessories, hydraulic components, decorative parts, plates, connectors, and technical components. Its good machinability makes it a common choice for precision parts and industrial components.
Brass generally responds well to both mechanical and laser marking technologies, although the result depends on the alloy’s composition and surface finish. It can be marked by deformation, incision, or surface modification.
The following can be marked on brass:
The laser marker is suitable when precision, high visual quality, or fine detail is required. It can be useful for nameplates, visible components, or parts with aesthetic requirements.
Dot peen marking is suitable for permanent and functional markings on robust brass parts.
Scribing may be recommended when a deep, continuous, and legible mark is needed, especially for alphanumeric text, part numbers, or nameplates.
Titanium is used in high-performance applications due to its strength-to-weight ratio, corrosion resistance, and use in demanding sectors such as aerospace, energy, technical applications, and specialty components.
Titanium requires careful selection of marking technology. It can be marked using laser, Dot peen marking, or scribing, but the part’s functional requirements, finish, end use, and potential sensitivity to thermal or mechanical effects must be considered.
The following can be marked on titanium:
A laser marker is generally recommended when precision, non-contact operation, high definition, and process control are required. It is particularly useful for codes, fine text, and high-value components.
Dot peen marking may be viable on robust titanium parts if the application allows for surface deformation and the depth is validated.
Scribing can be used in specific cases where a continuous mark is required and the part can withstand incision, although this must be carefully validated.
B CopperB is used in electrical components, connectors, busbars, electronic parts, power systems, thermal components, and elements where electrical or thermal conductivity is essential.
Copper has high thermal conductivity and high reflectivity, which can particularly affect laser marking. However, it can be marked industrially if the appropriate parameters are selected. Mechanical marking technologies may also be viable for robust parts.
The following can be marked on copper:
A laser marker may be suitable when absorption, contrast, and mark stability are verified. It is useful for precision components or when contactless marking is required.
Dot peen marking can be used on robust copper parts when permanent identification through deformation is needed.
Scribing may be suitable for text, part numbers, or deep marks on parts that can be incised.
The key question is not just whether a metal can be marked, but which technology produces a mark that is legible, durable, and suitable for the application. A machined steel part, an anodized aluminum plate, a brass valve, a titanium component, or a cast housing may each require different marking solutions.
Many industrial metals can be marked, including steel, stainless steel, aluminum, anodized aluminum, brass, titanium, copper, cast metal, and special alloys. The appropriate technology depends on the material, finish, hardness, geometry, and type of mark.
For heavy-duty steel parts, Dot peen marking is often a very suitable option due to its durability and low operating cost. Scribing is recommended for deep, quiet marks. Lasers are suitable when precision, small codes, or non-contact marking are required.
Lasers are generally recommended when a clean, precise, and non-contact mark is desired on stainless steel. Dot peen marking and scribing may also be suitable if the part can withstand deformation or incision and surface or corrosion requirements are not compromised.
Laser marking is generally well-suited for aluminum, especially on anodized aluminum or when high-definition codes, logos, and markings are required. Dot peen marking can be used on sturdy aluminum parts if the marking force is controlled.
Yes, although copper requires validation because it has high thermal conductivity and reflectivity. Laser marking may be suitable if the parameters are adjusted correctly and the necessary contrast is achieved. Mechanical technologies can also be used on sturdy parts.
Dot peen marking is suitable for many metals, especially robust parts made of steel, cast metal, aluminum, or brass. However, it is not always the best option for delicate, very thin parts, those with critical finishes, or those with strict automatic reading requirements.
Engraving is recommended when a deep, continuous, permanent mark with low noise levels is needed. It is especially useful for text, serial numbers, part numbers, and metal nameplates. For 2D codes, it must be carefully validated.
Laser marking is recommended when high definition, contactless marking, a good visual finish, small DataMatrix or QR codes, automated integration, or marking on delicate, anodized, or coated parts are required.
Metals can be marked with serial numbers, part numbers, lot numbers, dates, DataMatrix codes, QR codes, logos, alphanumeric text, technical plates, symbols, maintenance marks, and identifiers linked to traceability systems.
It can withstand wear and tear if the technology, depth, and type of mark are selected correctly. For parts subject to abrasion, cleaning, oils, temperature, or post-processing, it is recommended to validate durability through testing.
Yes, it is recommended when the material is a special alloy, the finish is critical, automatic reading is required, the part will undergo further processing, or there are strict requirements for depth, contrast, or durability.
