{
  "@context": [
    "https://schema.org",
    {
      "ec": "https://entitycodes.org/vocab#"
    }
  ],
  "@type": "DefinedTerm",
  "@id": "https://entitycodes.org/naics/331511/",
  "identifier": "331511",
  "name": "Iron Foundries",
  "description": "This U.S. industry comprises establishments primarily engaged in pouring molten pig iron or iron alloys into molds to manufacture castings (e.g., cast iron manhole covers, cast iron pipe, cast iron skillets).  Establishments in this industry purchase iron made in other establishments.",
  "url": "https://entitycodes.org/naics/331511/",
  "inDefinedTermSet": {
    "@type": "DefinedTermSet",
    "name": "NAICS 2022",
    "url": "https://entitycodes.org/naics/"
  },
  "sameAs": [
    "https://www.census.gov/naics/?input=331511&year=2022"
  ],
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "name": "SBA size standard",
      "value": "1,000 employees",
      "unitText": "employees",
      "description": "13 CFR 121.201, as-of 2023-03-17"
    },
    {
      "@type": "PropertyValue",
      "name": "IRS PBA code",
      "value": "331500",
      "description": "IRS Principal Business Activity code (method: rolled-up)"
    },
    {
      "@type": "PropertyValue",
      "name": "US establishments",
      "value": 269,
      "description": "Census County Business Patterns 2023"
    }
  ],
  "ec:crosswalk": [
    {
      "system": "SIC 1987",
      "code": "3321",
      "title": "Gray and Ductile Iron Foundries",
      "confidence": "chain",
      "via": "SIC1987:3321\u2192NAICS1997:331511\u21922002:331511\u21922007:331511\u21922012:331511\u21922017:331511\u21922022:331511",
      "url": "https://entitycodes.org/sic/3321/"
    },
    {
      "system": "SIC 1987",
      "code": "3322",
      "title": "Malleable Iron Foundries",
      "confidence": "chain",
      "via": "SIC1987:3322\u2192NAICS1997:331511\u21922002:331511\u21922007:331511\u21922012:331511\u21922017:331511\u21922022:331511",
      "url": "https://entitycodes.org/sic/3322/"
    }
  ],
  "ec:provenance": {
    "definition": {
      "source": "US Census 2022 NAICS Manual",
      "type": "US gov \u2014 public domain"
    },
    "crosswalk": {
      "source": "Census NAICS\u2194SIC concordance",
      "method": "transitive chain (NOT direct)"
    },
    "sba_size_standard": {
      "source": "SBA Table of Size Standards (13 CFR 121.201)",
      "as_of": "2023-03-17"
    },
    "establishments": {
      "source": "Census County Business Patterns",
      "year": 2023
    }
  },
  "license": "https://www.usa.gov/government-works",
  "dateModified": "2026-07-21",
  "isPartOf": {
    "@type": "DefinedTerm",
    "identifier": "3315",
    "name": "Foundries",
    "@id": "https://entitycodes.org/naics/3315/"
  }
}