"aço carbono" meaning in Portuguese

{
  "forms": [
    {
      "form": "aços carbono",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "+first"
      },
      "expansion": "aço carbono m (plural aços carbono)",
      "name": "pt-noun"
    }
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Portuguese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "pt",
          "name": "Alloys",
          "orig": "pt:Alloys",
          "parents": [
            "Metals",
            "Matter",
            "Metallurgy",
            "Chemistry",
            "Nature",
            "Technology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "carbon steel (alloy of iron and carbon, the most common kind of steel)"
      ],
      "id": "en-aço_carbono-pt-noun-Uew3eq4c",
      "links": [
        [
          "carbon steel",
          "carbon steel"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "aço carbono"
}

{
  "forms": [
    {
      "form": "aços carbono",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "+first"
      },
      "expansion": "aço carbono m (plural aços carbono)",
      "name": "pt-noun"
    }
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Portuguese countable nouns",
        "Portuguese entries with incorrect language header",
        "Portuguese lemmas",
        "Portuguese masculine nouns",
        "Portuguese multiword terms",
        "Portuguese nouns",
        "Portuguese nouns with red links in their headword lines",
        "pt:Alloys"
      ],
      "glosses": [
        "carbon steel (alloy of iron and carbon, the most common kind of steel)"
      ],
      "links": [
        [
          "carbon steel",
          "carbon steel"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "aço carbono"
}