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NAICS 331511, industry

NAICS 331511: Iron foundries

NAICS 331511 is the industry code for iron foundries. Use it on loan applications, tax forms and registrations. Explore financing for manufacturing and start your application when you are ready.

What 331511 covers

This code covers foundries that pour gray iron, ductile iron and malleable iron castings, such as pipe, fittings, engine blocks, manhole covers and machinery parts.

Included in this code

  • Gray and ductile iron castings
  • Malleable iron castings
  • Cast iron pipe and fittings
  • Cast iron manhole covers and grates
  • Machinery and engine castings

Not this code

Businesses that use 331511

Ductile iron foundryMunicipal casting producerEngine block foundry

Financing for this trade

Iron foundries finance melt furnaces, molding lines and sand systems with equipment loans and use lines of credit for scrap and receivables. Lenders look at energy costs, environmental compliance and OEM concentration.

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Is 331511 the right code for an iron foundry?

Yes, if you pour iron castings. Steel castings belong in 331512 or 331513, and aluminum or other nonferrous castings in the 33152 codes. Foundries that also machine their castings usually stay in 331511 when casting is the main activity, rather than moving to 332710.

What is the SBA size standard for 331511?

Under 13 CFR 121.201, a business classified under NAICS 331511 is small if it averages no more than 1,000 employees, counting affiliates, over the prior 24 months. SBA uses that number for loan eligibility and federal agencies use it for small business set asides. A firm above it can still qualify for SBA 7(a) and 504 loans under the alternative standard of $15 million tangible net worth and $5 million average net income.

What financing do foundries use?

Foundries typically finance induction furnaces, molding machines and sand reclamation systems with equipment loans and fund scrap, alloys and receivables with a revolving line. SBA 7(a) loans are often used to buy family owned foundries. Lenders look at customer mix, energy costs and environmental permits.

What does NAICS 331511 cover?

Iron foundries. Industry level code in NAICS 2022, under 31-33 Manufacturing, 331 Primary metal manufacturing, 3315 Foundries, 33151 Ferrous metal foundries.

What financing do NAICS 331511 businesses use?

Equipment financing, working capital, SBA loans and invoice factoring are the products placed most for manufacturing businesses. Start an application and the AI matches the deal to lenders that fund this code.

Where do I put NAICS 331511?

On the SBA loan application, on federal Schedule C or Form 1120, on SAM.gov and state registrations, and on most lender applications. A business can report more than one code; use this one if it describes what produces most of your revenue.