# NAICS 331512: Steel Investment Foundries

Breadcrumb: [NAICS codes](https://bidrover.com/naics) › [331512 Steel Investment Foundries](https://bidrover.com/naics/331512)

This U.S. industry comprises establishments primarily engaged in manufacturing steel investment castings. Investment molds are formed by covering a wax shape with a refractory slurry. After the refractory slurry hardens, the wax is melted, leaving a seamless mold. Investment molds provide highly detailed, consistent castings. Establishments in this industry purchase steel made in other establishments.

- NAICS code: 331512
- Title: Steel Investment Foundries
- Sector: 31-33 Manufacturing
- Subsector: 331 Primary Metal Manufacturing
- Industry group: 3315 Foundries
- NAICS industry: 33151 Ferrous Metal Foundries
- SBA size standard: 1,050 employees
- Open bids on BidRover: 0

## Open bids (0)

No open bids cite this code right now.

## Frequently asked questions

### What is NAICS code 331512?

NAICS 331512 is "Steel Investment Foundries" in the 2022 North American Industry Classification System, in sector 31-33 (Manufacturing). This U.S. industry comprises establishments primarily engaged in manufacturing steel investment castings. Investment molds are formed by covering a wax shape with a refractory slurry. After the refractory slurry hardens, the wax is melted, leaving a seamless mold. Investment molds provide highly detailed, consistent castings. Establishments in this industry purchase steel made in other establishments.

### What is the SBA size standard for NAICS 331512?

A business is small under NAICS 331512 at or below 1,050 employees, including affiliates (13 CFR 121.201). Confirm the standard named in each solicitation.

### How many government bids are open under NAICS 331512?

No open bid in BidRover cites NAICS 331512 right now. Many state and local notices do not list a NAICS code, so a keyword alert for this work catches more of them.

### How do I get alerts for NAICS 331512 bids?

Save an alert on this page. A free account gets new matching bids by weekly email; the Team plan ($19/mo) sends daily alerts with match scores, the buyer, source link and documents.

## Related NAICS codes

- [331513 Steel Foundries (except Investment)](https://bidrover.com/naics/331513)
- [331511 Iron Foundries](https://bidrover.com/naics/331511)
- [331523 Nonferrous Metal Die-Casting Foundries](https://bidrover.com/naics/331523)
- [331524 Aluminum Foundries (except Die-Casting)](https://bidrover.com/naics/331524)
- [331529 Other Nonferrous Metal Foundries (except Die-Casting)](https://bidrover.com/naics/331529)

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Code titles and definitions: U.S. Census Bureau, North American Industry Classification System (NAICS), 2022 (https://www.census.gov/naics/). Size standards: U.S. Small Business Administration, Small Business Size Standards, 13 CFR 121.201, eCFR text current as of 2026-10-21 (https://www.ecfr.gov/current/title-13/section-121.201).

BidRover lists bids from official public sources. It is not an issuing authority; confirm the NAICS code and size standard named in each solicitation.