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How to Engrave Metal: 8 Methods Compared, and How to Pick One
- HT Marker Team
- Updated
How to engrave metal: for one piece at home, use a rotary engraver, letter punches or electro-etching. For clean, repeatable logos, codes and serial numbers on bare metal, use a fiber laser. For deep serial numbers that must survive paint or galvanizing, use a dot peen marker. Diode and CO2 lasers only mark coatings or sprayed metal.
- 8 methods compared
- Stainless, aluminum, brass, steel
- Laser vs dot peen
- Fixes for common problems
Pick your method in 3 questions
Three answers decide the method: how many parts, what happens to the part after marking, and what the mark must do.
The short answers:
- One gift, a knife or a few tools → a rotary engraver, letter punches or electro-etching. See at home.
- Logos, photos or QR codes, dozens a week or more → a fiber laser.
- Serial numbers or VINs on parts that get painted, powder coated or galvanized → a dot peen marker.
- A few coded parts a year → send them to a marking service instead of buying a machine.
8 ways to engrave metal, compared
Only three of these put a lasting, repeatable mark on bare metal in seconds: fiber laser, dot peen and stamping. The rest are fine for one-off pieces or need a coating to work.
| Method | Bare metal? | Depth | Time per mark | Start-up cost | Survives paint? | Best for |
|---|---|---|---|---|---|---|
| Fiber laser | Yes, all metals | Surface to about 0.2 mm | Seconds | From $ 2,310 | Shallow marks get covered | Logos, photos, QR codes, serials |
| Dot peen | Yes, up to about HRC 60 | 0.05–1.0 mm | Seconds per line | From $ 1,850 | Yes, at 0.8 mm+ | Serials, VINs, castings, coated parts |
| Letter punches | Soft metals | Deep | A strike per letter | Low | Yes | A few tags, tools, blacksmith work |
| Rotary or vibro engraver | Yes, slowly | Scratch to light groove | Minutes | Low | Often not | Names on tools, one-off gifts |
| Hand graver | Yes | Fine to deep | Minutes to hours | Low, plus months of practice | If deep | Jewelry, art, firearms engraving |
| Electro or chemical etching | Yes, through a stencil | Shallow | About a minute, plus stencil | Low to medium | Often not | Logos on knives and tools in small batches |
| Diode or CO2 laser + spray | No, needs spray or a coating | None (a baked layer) | Minutes | Medium | No | Anodized or painted items, hobby use |
| Send to a marking service | Yes | Any | Shipping time | None | Depends on method | A few parts a year |
Engraving, etching and marking: why the difference matters
Engraving removes metal, etching removes a thin layer, and marking only changes the color of the surface. The deeper the mark, the more it can take: paint, blasting, wear and heavy polishing all wipe out a color-only mark first.
More on the terms in laser marking vs engraving vs etching.
How to engrave stainless steel, aluminum, brass and other metals
The metal decides the result. One fiber laser makes a black mark on stainless steel, a white mark on bare aluminum and a bright cut on brass. Dot peen looks much the same on every metal.
Stainless steelFiber laser for black marks and photos; dot peen for deep serials
A black mark on stainless is a heat effect called annealing, not depth. It needs slow speed and overlapping lines; a MOPA laser such as the HS-FL60M makes it easier. Annealing can weaken corrosion resistance under the mark, and passivating afterward can fade it, so mark before passivation (Laser Focus World).
Carbon and mild steelDot peen for parts that get painted; fiber laser for clean text
The classic dot peen metal: deep, fast and readable after coating. A fiber laser gives a gray to dark engraving that looks sharper, but a shallow mark can disappear under paint.
AluminumAnodized: any laser. Bare: fiber laser or dot peen
On anodized aluminum the laser removes the color layer and leaves a crisp white mark. Bare aluminum marks white or light gray with a fiber laser; a black mark on bare aluminum needs a MOPA source. More in our aluminum guide.
Brass and copperFiber laser with more passes, or dot peen
Brass and copper reflect much of the beam, so they need full focus, slower speed and more passes. Both are soft, so dot peen and letter punches go in deep and easily.
Galvanized and painted steelLaser on the finished coating; dot peen before galvanizing
A fiber laser removes paint or zinc and shows metal underneath. Zinc turns into fume, so use extraction. If the mark goes on before hot-dip galvanizing, make it at least 0.8 mm deep and 13 mm high (AGA).
Titanium and chrome-plated toolsFiber laser
Titanium takes black, white and color marks with a fiber laser. On chrome-plated tools, a fiber laser cuts through the chrome; marking sprays and diode lasers usually do not stick to chrome.
Can a diode or CO2 laser engrave metal?
Not bare metal. Blue diode lasers (about 450 nm) and CO2 lasers (10,600 nm) are mostly reflected by bare metal. They can remove paint or anodizing, or bake a marking spray onto the surface. To mark bare stainless, aluminum, brass or titanium, you need a fiber laser at 1064 nm.
| Laser | Bare steel and stainless | Bare aluminum | Anodized or painted metal |
|---|---|---|---|
| Fiber (1064 nm) | Yes: marks and engraves | Yes | Yes |
| Blue diode (about 450 nm) | Only with marking spray | Little or nothing | Yes, removes the coating |
| CO2 (10,600 nm) | Only with marking spray | No | Yes, removes the coating |
How to engrave metal with a fiber laser
- Clean the partWipe off oil, grease and dust. A dirty spot marks unevenly.
- Fix the part and set the focusPlace the part so it cannot move. Raise or lower the head until the surface sits at the lens focal distance; the red guide light shows where the mark will land. Out of focus, the mark turns faint.
- Load the designText, serial numbers and codes come from the software; serials can count up automatically. Logos work best as vector files (DXF, PLT, AI).
- Add hatch (fill)A line spacing of 0.02–0.05 mm gives a solid fill. For a smoother, deeper result, add 2–3 hatch layers at different angles.
- Run a test grid on scrapMark small squares with different power and speed on the same metal. Pick the square you want and save those settings.
- Mark and checkMark the real part and scan any code with the reader your customer uses. For depth, add passes rather than slowing to a crawl.
Fiber laser settings for metal: ranges to test
No setting works on every machine. The laser source (Q-switched or MOPA), its power, the lens and the exact alloy all change the result: 304 and 316 stainless react differently to the same numbers. Use these ranges to build a test grid.
| Goal | Power | Speed | Frequency | Hatch | Passes |
|---|---|---|---|---|---|
| Fast surface mark (serials, codes) | 50–80% | 1,000–3,000 mm/s | 30–60 kHz | 0.03–0.05 mm | 1 |
| Deep engraving | 90–100% | 300–1,500 mm/s | 20–40 kHz | 0.02–0.03 mm, rotating angles | 5–20+ |
| Black mark on stainless | 30–60% | Slow: 50–300 mm/s | High: 100 kHz+ (MOPA) | 0.01–0.02 mm | 1–2 |
| White mark on anodized aluminum | Low: 20–40% | 1,000–2,000 mm/s | 30–60 kHz | 0.03–0.05 mm | 1 |
Ranges to test on a 20–60 W fiber laser with a standard 110 × 110 mm lens. They are starting points, not tested recipes. Send us the metal and the look you need, and our team will suggest starting settings.
How to engrave metal with a dot peen marker
A dot peen marker presses a hard pin into the metal, dot by dot. It is the method shops pick when the mark must survive paint, blasting or galvanizing, or when the part is rough, oily, cast or too big to move.
- Hold the part or the marker stillClamp small parts in a vise under a benchtop marker. On big parts, hold a handheld marker flat on the surface, or use its magnet base or a pipe bracket.
- Set the textType the text or load a logo on the touchscreen or PC software. Serial numbers and dates count up on their own.
- Set the depthDepth comes from pin force. Electric and battery markers reach about 0.05–0.5 mm; pneumatic markers reach 0.8–1.0 mm.
- Test on scrapCheck depth and readability on the same metal. Steel harder than about HRC 60 marks shallow; test it first.
See all dot peen marking machines, or the handheld models for parts you cannot move.
How to engrave metal at home without a laser
For one or two pieces, a rotary engraver, letter punches or electro-etching is enough. None of them makes small, neat serial numbers quickly.
Rotary or vibro engraver
Clean the metal and trace the design with a fine marker. Use a diamond or carbide tip, let it do the work and do not press hard. Clamp the part: a hand-held tool wanders on smooth metal. Wear safety glasses and a dust mask.
Letter punch set
Place a steel punch on soft metal such as aluminum, brass or copper and strike once with a hammer. Cheap and deep, but letters often land crooked. Practice spacing on scrap.
Electro-etching
Cover the metal with a vinyl or tape stencil. Salt water and a low-voltage power source eat away the exposed metal. Work in fresh air, then neutralize and rinse the part.
Hand graver
Clamp the piece in a vise and push a V-shaped graver at a low angle in light passes. Expect weeks of practice before lettering looks clean.
Serial numbers, VINs and codes that scanners can read
A code must be big enough, have contrast and keep a clear border. Leave a quiet zone of at least 4 cells around a QR code, as the QR standard (ISO/IEC 18004) asks, and make each cell several times wider than the laser line or the peen dot.
Fiber laser
Sharp, high-contrast codes as small as a few millimeters on flat, clean metal. The first choice for small parts, plates and tags.
Dot peen
Data Matrix codes made of dots, readable on rough, cast, oily or coated parts, and after paint. Needs a larger code and a reader that handles dot-peen codes.
Grading
If a customer sets a code grade, check it with a verifier. Industry rules include ISO/IEC TR 29158 for direct part marks and MIL-STD-130 for US defense parts.
Will the mark survive paint, galvanizing or washing?
Rule of thumb: if you can feel the mark with a fingernail, it usually survives a coating; if you can only see it, it may not. Mark before coating or passivation, not after. This table summarizes published guidance; test your own process before production.
| After marking | Laser color mark | Laser engraving | Dot peen |
|---|---|---|---|
| Paint or powder coat | Covered | Thin coats only | Reads through |
| Hot-dip galvanizing | Covered | Usually covered | Reads at 0.8 mm+ deep, 13 mm+ high (AGA) |
| Blasting or grinding | Removed | Light blasting only | Survives |
| Passivation (stainless) | May fade; mark first | Stays | Stays |
| Washing and dishwashers | Stays; rust risk under black marks | Stays | Stays |
Why your metal engraving fails, and how to fix it
| Problem | Likely cause | Fix |
|---|---|---|
| Diode laser will not mark stainless or aluminum | Wrong wavelength | Use marking spray for a surface mark, or a fiber laser for real engraving |
| Spray mark washes off | Coat too thick, dirty metal, or chrome plating | Thin, even coat on degreased metal; chrome needs a fiber laser |
| Stainless turns yellow or brown, not black | Too fast, too much power, or lines too far apart | Slow down, tighten the hatch, raise frequency; a MOPA source helps |
| Black-marked cutlery rusts after washing | Heat weakened the protective layer | Mark before passivation, or passivate after; test your process |
| Powder-coated tumbler scorches | Too much power on the coating | Lower power, faster speed, one pass to remove the coat only |
| Faint or blurry laser mark | Out of focus | Reset the focal distance before changing settings |
| Thin tag warps | Too much heat at once | Raise speed, lower power, add passes with a pause |
| Dot peen dents a thin part | Pin force too high, part not supported | Lower force and support the back of the part |
| Dot peen marks get shallower | Worn stylus tip | Check and replace the stylus |
How much does it cost to engrave metal?
Hand tools cost little but take minutes per piece; machines cost more but mark in seconds. Our machines, with prices shown and US duties included:
| Machine | Type | Price | Fits |
|---|---|---|---|
| HS-DP01 | Benchtop pneumatic dot peen | $ 1,850 | Deep serials on parts and plates |
| HS-DE05 | Benchtop electric dot peen | $ 1,850 | Nameplates and tags, no air compressor |
| HS-PE02 | Handheld electric dot peen | $ 2,070 | Serials on parts too big to move |
| HS-PFL30M | Handheld fiber laser, 30 W | $ 2,310 | QR codes and logos on big parts |
| HS-FL30 | Desktop fiber laser, 30 W | $ 2,860 | Logos, codes and serials on small parts |
| HS-FL60M | Desktop MOPA fiber laser, 60 W | $ 4,400 | Black and color marks on stainless |
Running costs are low for both: electricity, plus a stylus tip for dot peen or a lens wipe for laser. Marking only a few parts a year? A local marking or engraving shop costs less than a machine.
Is engraving metal safe at home?
Laser light
A fiber laser is a Class IV laser: the direct or reflected beam can injure eyes and skin (FDA). Open-beam units need glasses rated for 1064 nm for everyone nearby; an enclosed unit such as the HS-FL30E shields the beam.
Fumes
Vaporized coatings, zinc and metal make fine fume; use an extractor. Hot work on stainless steel can release hexavalent chromium, which OSHA limits to 5 µg/m³ (OSHA).
Dust, noise and chemicals
Rotary tools throw metal dust: wear glasses and a mask. Dot peen is loud on long runs: wear hearing protection. Etching solutions need gloves, fresh air and safe disposal.
Metal engraving questions
What is the best way to engrave metal?
For logos, codes and serial numbers on any bare metal, a fiber laser. For deep marks that must survive paint, blasting or galvanizing, dot peen. For a single piece at home, a rotary engraver or letter punches.
Can a diode laser engrave metal?
Not bare metal. A diode laser can remove paint or anodizing, or bake a marking spray onto the metal. Real engraving of bare metal needs a fiber laser.
How long does laser engraving last on metal?
As long as the surface it is in. An engraved mark lasts the life of the part; a color-only mark can be removed by grinding, blasting or heavy polishing.
Will laser-engraved stainless steel rust?
An engraved mark does not rust more than the rest of the part. A black annealed mark can weaken corrosion resistance under the mark, so mark before passivation and test parts that go through washers or salt.
How do I permanently mark metal without a laser?
Use a dot peen marker, letter punches or electro-etching. For a quick ID on tools, a rotary or vibro engraver works.
How deep can a fiber laser engrave metal?
A 30 W fiber laser reaches about 0.1–0.2 mm with several passes; deeper relief needs more power and many passes. A pneumatic dot peen marker reaches 0.5–1.0 mm in seconds.
What are the downsides of laser etching metal?
Shallow marks can disappear under paint or blasting, open-beam lasers need eyewear and fume extraction, and settings take practice. Machine cost is higher than hand tools.
Not sure which method fits your part?
Send a photo of the part, the metal, the mark you need and how many parts a week. Our team tells you which method fits, laser or dot peen, and can mark a sample.
