St Marys Foundry

What St Marys Foundry does

St Marys Foundry is a privately held iron casting manufacturer headquartered in St. Marys, Ohio. Founded in 1917 and operating as an Ariel Company subsidiary, the firm runs a single manufacturing facility with 101-250 employees, two 20-ton electric coreless induction furnaces, and flask/pit plus no-bake chemically-bonded sand molding. It produces Gray Iron, Ductile Iron, Ni-Resist, and specialty metal castings in the 1,000-60,000 lb range, with tensile strengths ranging from 20,000-60,000 psi for Gray Iron to 60,000-120,000 psi for Ductile Iron.

The company operates a project-based enterprise foundry model, selling directly to industrial OEMs in four primary verticals: air and gas compression, pumps and valves, machine and tool, and specialty machinery. St Marys differentiates on engineered castings with sophisticated metal compositions (including proprietary customer-specific recipes) that many foundries cannot produce reliably. Supporting services are vertically integrated: pattern building, repair, design, and storage; heat treatment; NDT (DP/MP/UT/RT/X-ray); a full in-house metallurgical laboratory with tensile, hardness, impact, and metallographic testing plus SEM and spectrochemical analysis; and Magmasoft/SolidWorks solidification simulation.

Commercially, the firm uses direct B2B field sales with project-specific quotes; pricing is non-public and varies with casting weight, complexity, material, and volume. Marketing runs through the company website, trade show participation, and ISO 9002 / ongoing ISO compliance credentials as quality signals. In 2024, the company received the AFS/Casting Source Casting of the Year award for a 6,600-pound ductile iron power frame used in the fracking industry. No revenue, funding, headcount trend, or capacity utilization figures are disclosed.

Name

St Marys Foundry

Legal name

St. Marys Foundry Ltd.

Website

https://stmfoundry.com

Company type

Private

Founded year

1917

Operating status

Operating

Headcount range

101–250 employees

Short description

St Marys Foundry is a privately held Ohio iron foundry producing 1,000-60,000 lb Gray Iron, Ductile Iron, Ni-Resist, and specialty metal castings for industrial OEMs in air and gas compression, pumps and valves, machine and tool, and specialty machinery markets.

Ownership category

akta.pro rank

Product category

Iron Foundry / Metal Casting Manufacturing

NAICS

Iron Foundries (331511), Foundries (3315)

SIC

Iron & Steel Foundries (3320)

akta.pro primary industry

Steel Casting (Continuous Casting, Ingots, Semi-Finished Slabs/Billets/Blooms) (IMAKABAD)

akta.pro secondary industries

Industrial Furnaces, Kilns & Thermal Processing Equipment (IMAHAEAE), Heat Treatment & Thermal Processing Furnaces (Hardening, Annealing, Induction) (IMAHADAI)

Keywords

• Iron casting foundry
• Gray iron castings
• Ductile iron castings
• Non-destructive testing services
• Industrial metal castings

Headquarters

HQ city

Saint Marys

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Infrastructure, Technology or R&D

Revenue model

1. Iron Casting Production Services: Custom iron casting production services ranging from 1,000 lbs to 60,000 lbs per casting. Customers provide patterns or the foundry provides pattern building/repair/design/storage services. Revenue generated through project-based casting orders with pricing based on complexity, weight, and material specifications.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

St. Marys Foundry produces custom Gray Iron, Ductile Iron, Ni-Resist, and specialty metal castings ranging from 1,000 lbs to 60,000 lbs using two 20-ton electric coreless induction furnaces and flask, pit, and no-bake sand molding. The foundry also offers an integrated suite of in-house services including pattern building/repair, solidification modeling (Magmasoft/SolidWorks), heat treatment, NDT (DP/MP/UT/RT/X-Ray), electronic scanning dimensional verification, and full mechanical and metallurgical testing.

Product overview

St. Marys Foundry is a world leader in metal casting solutions, offering a unified portfolio of core casting products and comprehensive manufacturing services. The company produces four primary casting types: Gray Iron Castings (20,000-60,000 psi tensile), Ductile Iron Castings (60,000-120,000 psi tensile), Ni-Resist Castings, and Specialty Metal Castings with proprietary customer compositions—all ranging from 1,000 lbs to 60,000 lbs. These core products are supported by an integrated suite of services including NDT testing (DP/MP/UT/RT/X-Ray), pattern building and repair, solidification modeling (Magmasoft/SolidWorks), heat treatment, and full-range mechanical testing. The company operates two 20-ton electric coreless induction furnaces with flask and pit molding capabilities using chemically-bonded sand. St. Marys Foundry serves specialized industry segments including Air & Gas Compression, Pumps & Valves, Machine & Tool, and Specialty Machinery.

Differentiator

Problem solved

Functional benefit

Products and services

• Gray Iron Castings Custom Gray Iron castings produced at St. Marys Foundry, ranging from 1,000 lbs to 60,000 lbs with tensile strengths of 20,000–60,000 psi, for industrial OEMs in Air & Gas Compression, Pumps & Valves, Machine & Tool, and Specialty Machinery.
• Ductile Iron Castings Custom Ductile Iron castings produced at St. Marys Foundry, ranging from 1,000 lbs to 60,000 lbs with tensile strengths of 60,000–120,000 psi. Awarded the 2024 AFS/Casting Source Casting of the Year for a 6,600-pound ductile iron power frame used in the fracking industry.
• Ni-Resist Castings Ni-Resist (austenitic nickel-alloyed iron) castings for specialized applications requiring corrosion and heat resistance, produced within the foundry's 1,000–60,000 lb size range.
• Specialty Metal Castings Proprietary customer-specific iron compositions and specialty metal castings for highly engineered applications, leveraging St. Marys' capability to pour sophisticated alloys many foundries cannot produce.
• Jobbing and Prototype Castings Custom jobbing work and prototype casting services for small to large production runs of iron castings.
• Non-Destructive Testing (NDT) Services Non-destructive testing services including Dye Penetrant (DP), Magnetic Particle (MP), Ultrasonic (UT), Radiographic (RT), and X-Ray inspection for quality verification of castings without damaging parts.
• Pattern Building, Repair, Design, and Storage Services Pattern building, repair, design, and storage services for casting molds supplied to or managed by St. Marys Foundry.
• Solidification Modeling Computer-aided solidification modeling using Magmasoft and SolidWorks software to optimize casting quality and reduce defects prior to production.
• Heat Treatment Services Full range of heat treatment services for castings to achieve desired mechanical properties.
• Mechanical Testing Services Comprehensive mechanical testing including tensile, yield, elongation, Brinell hardness, impact testing, and metallographic analysis.
• Metallurgical Laboratory Services In-house metallurgical laboratory services including spectrochemical analysis, combustion/carbon/sulfur determination, Scanning Electron Microscope (SEM) imaging, and microanalysis.
• Electronic Scanning Dimensional Verification Precision dimensional verification of castings using electronic scanning technology to ensure specifications and tolerances are met.

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators4 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Charlotte Pipe and Foundry: Vertically integrated iron foundry producing cast iron pipe and fittings, sharing the same gray/ductile iron melting and molding processes as St. Marys Foundry.
• East Jordan Iron Works: Long-running U.S. iron foundry producing gray and ductile iron castings for waterworks, construction, and industrial customers, with similar focus on heavy, durable cast components.
• Neenah Foundry: Producer of iron castings (gray and ductile) for infrastructure, industrial, and municipal markets. Comparable in iron casting technology and heavy-industrial customer base.
• American Cast Iron Pipe Company: Diversified iron manufacturer with foundry operations producing iron castings and ductile iron pipe for water, energy, and industrial markets. Directly comparable in iron metallurgy and process capability.
• Dotson Iron Castings: Iron foundry producing heavy gray and ductile iron castings for OEMs in construction, mining, energy, and machinery. Comparable in scale, vertical mix, and focus on large engineered castings.
• Waupaca Foundry: One of the largest iron foundries in North America, producing gray and ductile iron castings for automotive, industrial, and heavy equipment markets. Direct competitor to St. Marys in large engineered iron castings.
• Metaltek International: Specialty metalcaster producing engineered castings in iron, steel, and non-ferrous alloys for industrial OEMs. Comparable in serving complex, low-volume/high-spec engineered casting projects.
• Pelton Casteel: Specialty iron and steel casting producer serving industrial OEMs with engineered, low-to-mid volume castings. Comparable in technical, quality-driven, custom-casting positioning.
• Grede Holdings: U.S. producer of iron castings (gray and ductile) serving transportation, industrial, and machinery end markets. Highly comparable in process technology, customer base, and casting weight class to St. Marys.

Broad incumbents

• McWane: Diversified heavy-industrial manufacturer owning multiple iron foundries and related businesses (e.g., pipe, fittings, valves). Overlaps with St. Marys in iron casting capability and in serving pumps/valves/compression customers, but operates as a much broader portfolio company.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/stmfoundry
• Facebookfacebook.com/stmfoundry

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about St Marys Foundry