{"id":13574,"date":"2026-08-13T11:39:51","date_gmt":"2026-08-13T03:39:51","guid":{"rendered":"https:\/\/hwleiclaser.com\/?post_type=blogs&p=13574"},"modified":"2026-08-13T11:39:51","modified_gmt":"2026-08-13T03:39:51","slug":"laser-cutting-machine-steel-guide-power-thickness-and-assist-gas","status":"publish","type":"blogs","link":"https:\/\/hwleiclaser.com\/es\/blogs\/laser-cutting-machine-steel-guide-power-thickness-and-assist-gas\/","title":{"rendered":"Gu\u00eda sobre acero para m\u00e1quinas de corte l\u00e1ser: potencia, espesor y gas de asistencia"},"content":{"rendered":"

For steel, power sets the practical thickness ceiling and assist gas sets edge quality: oxygen cuts carbon steel thicker per kilowatt with an oxidised edge, nitrogen cuts stainless clean at higher gas cost. Published thickness charts differ because test conditions differ, not because one is wrong.<\/p>\n

The chart problem: five sources, five different maximums<\/h2>\n

Search “laser cutting machine steel<\/strong> \u00abtabla de espesores\u00bb y obtendr\u00e1 tablas que difieren en un 30 % o m\u00e1s para el mismo nivel de potencia. Un proveedor indica 25 mm de acero al carbono a 6 kW. Otro indica 20 mm. Un tercero indica 30 mm y no a\u00f1ade ninguna nota al pie.
\nNone of them are necessarily lying. They are measuring different things.
\nVariables that move a published thickness number without any change in laser power:<\/p>\n

    \n
  1. Calidad y conducci\u00f3n del haz. Dos fuentes de 6 kW con distintos di\u00e1metros de n\u00facleo de fibra y colimaci\u00f3n producen diferentes densidades de potencia en el punto focal. La cifra de kilovatios de la ficha t\u00e9cnica describe la salida en la fuente, no lo que llega a la ranura de corte.<\/li>\n
  2. Nozzle diameter and standoff. A larger nozzle passes more gas and tolerates more thickness, at the cost of consumption and precision on thin sheet.<\/li>\n
  3. Assist gas purity. Nitrogen at 99.999% and nitrogen at 99.5% cut differently on stainless. Purity is rarely stated on a marketing chart.<\/li>\n
  4. Material grade and surface condition. Hot-rolled plate with heavy mill scale behaves differently from pickled and oiled sheet of the same nominal thickness. Sulphur content in stainless changes dross behaviour.<\/li>\n
  5. Si se incluy\u00f3 la perforaci\u00f3n. Algunas tablas indican el espesor que una m\u00e1quina puede seccionar una vez que ya est\u00e1 cortando. Perforar una placa de 25 mm es un problema distinto, y el tiempo de perforaci\u00f3n puede superar el tiempo de corte en contornos peque\u00f1os.
    \n6.Test duty cycle. A single demonstration cut on a cool machine at optimum focus is not eight hours of production with a warm optical train and a shift operator who did not re-focus after a lens change.<\/li>\n<\/ol>\n

    La consecuencia pr\u00e1ctica: utilice las tablas publicadas para preseleccionar un nivel de potencia y, despu\u00e9s, exija un corte de muestra en su propio material antes de firmar. Cualquier proveedor que no quiera realizar uno en el grado que usted realmente compra le ha dicho algo \u00fatil.<\/p>\n

    \"Cl\u00e1sico<\/p>\n

    Maximum thickness is not production thickness<\/h2>\n

    A specification sheet’s maximum thickness is the point at which the machine will get through the material. Production thickness is the point at which it gets through the material at a speed and edge quality that your downstream process accepts, repeatably, on a full sheet.
    \nLa diferencia entre ambos suele ser de uno a dos tama\u00f1os de material. En el extremo superior de un nivel de potencia, varias cosas se degradan a la vez: la velocidad de corte disminuye considerablemente, aumenta la adhesi\u00f3n de escoria, se ensancha la ranura de corte y el aporte t\u00e9rmico a la pieza aumenta lo suficiente como para importar en bastidores con tolerancias ajustadas. Las caracter\u00edsticas internas peque\u00f1as y las esquinas afiladas son donde esto aparece primero, porque la m\u00e1quina no puede mantener la velocidad de avance que presupone el conjunto de par\u00e1metros de corte.
    \nA working rule for capacity planning: size the machine so that your highest-volume material sits in the middle third of its thickness range, not the top. If 80% of your work is 6 mm to 12 mm carbon steel, a machine that tops out at 12 mm will do it and will be slow and consumable-hungry doing it.<\/p>\n

    Carbon steel and stainless: what actually changes<\/h2>\n

    The two materials do not simply need different parameters. They need a different cutting mechanism, and that changes the gas contract, the edge you hand to the next operation, and the cost per metre.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
    Dimensi\u00f3n<\/td>\nCarbon steel (oxygen cutting)<\/td>\nAcero inoxidable (corte con nitr\u00f3geno)<\/td>\n<\/tr>\n
    Mecanismo de corte<\/strong><\/td>\nExothermic oxidation adds heat to the cut<\/td>\nInert melt-and-blow, laser supplies all energy<\/td>\n<\/tr>\n
    Effective thickness per kW<\/strong><\/td>\nHigher, because the reaction contributes energy<\/td>\nLower at equal power<\/td>\n<\/tr>\n
    R\u00e9gimen de presi\u00f3n de gas<\/strong><\/td>\nBaja presi\u00f3n<\/td>\nHigh pressure<\/td>\n<\/tr>\n
    Gas consumption<\/strong><\/td>\nModerado<\/td>\nHigh, main variable cost driver<\/td>\n<\/tr>\n
    Edge appearance<\/strong><\/td>\nGrey-black oxide layer<\/td>\nBright, oxide-free<\/td>\n<\/tr>\n
    Impacto posterior<\/strong><\/td>\nOxide must be removed before painting, powder coating or welding<\/td>\nWeldable and paintable as cut<\/td>\n<\/tr>\n
    Typical failure mode at limit<\/strong><\/td>\nAdherencia de escoria en la parte inferior, aumento de la rugosidad de las estr\u00edas<\/td>\nDross beads, edge discolouration if purity drops<\/td>\n<\/tr>\n
    Nitrogen alternative on carbon steel<\/strong><\/td>\nPosible, proporciona un borde soldable, corta espesores menores con la misma potencia<\/td>\nNo aplicable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Esa \u00faltima fila es la decisi\u00f3n que la mayor\u00eda de los compradores pasa por alto. Si sus piezas de acero al carbono pasan directamente a soldadura o recubrimiento, cortarlas con nitr\u00f3geno elimina una etapa de desbarbado o esmerilado. Tambi\u00e9n reduce la capacidad de espesor con la misma potencia y aumenta considerablemente el gasto de gas. Que esa compensaci\u00f3n valga la pena depende de su coste de mano de obra para las operaciones secundarias, no de la m\u00e1quina.<\/p>\n

    Choosing assist gas: a five-step sequence<\/h2>\n

    Analice esto antes de especificar un suministro de gas, porque un tanque de nitr\u00f3geno l\u00edquido y un sistema de aire comprimido son proyectos de inversi\u00f3n distintos.<\/p>\n

      \n
    1. Enumere sus materiales por volumen, no por variedad. La decisi\u00f3n sobre el gas depende del material que corta durante m\u00e1s horas a la semana, no del que aparece en m\u00e1s planos.<\/li>\n
    2. Identifique la operaci\u00f3n posterior de cada uno. Las piezas pintadas, con recubrimiento en polvo y soldadas se preocupan por el \u00f3xido. Los soportes estructurales destinados al montaje normalmente no.<\/li>\n
    3. Set an edge-quality specification in words your inspector can apply. “No visible dross detectable by hand” is checkable. “Clean edge” is not.<\/li>\n
    4. Price the gas per cutting hour, not per cylinder. Ask the supplier for consumption at the nozzle diameters your thickness range requires, then multiply by realistic machine uptime. High-pressure nitrogen on thick stainless can rival electricity as a running cost.<\/li>\n
    5. Decide whether compressed air belongs in the mix. On thin sheet, filtered and dried compressed air cuts at low cost and leaves a slightly nitrided edge that is acceptable for many enclosures and brackets. It requires genuine air preparation: an undersized dryer produces intermittent quality problems that get blamed on the laser for months.<\/li>\n<\/ol>\n

      What drives cost per metre<\/h2>\n

      Four inputs dominate, and only one of them is the machine price.<\/p>\n