Midwest Metal Products, Inc (MMP)

What Midwest Metal Products, Inc (MMP) does

Midwest Metal Products, Inc. (MMP) is a privately held, custom metal casting foundry founded in the 1950s and headquartered in Winona, Minnesota. The company specializes in sand casting — using both green sand and air-set molding processes, with induction melting — producing iron castings up to 1,800 lbs and steel castings up to 1,100 lbs. MMP is differentiated by being owned and operated by certified metallurgists (President Joe Plunger and Technical Director Jeanne Wagner), and by offering an integrated value chain under one roof: casting, in-house heat treatment (case hardening, through hardening, annealing, normalizing, tempering, quenching), finishing (machining, painting, grinding, sand blasting, light assembly), and engineering/design (solidification modeling, reverse engineering, prototyping, weldment-to-casting conversions). The company also operates 3D-printed mold prototyping for low-cost, tool-less lead times.

MMP serves enterprise industrial customers across multiple verticals, including trenchless construction, energy (power generation and oil & gas), food processing, mining, and municipal/water infrastructure. Named customers include Vermeer, Fastenal, Parker Hannifin, Netzsch, Konecranes, Oshkosh, Steffes Corp, and NASA (via Innovative Hydraulics for the Artemis program's Crawler-Transporter). The company is ISO 9001 certified, OSHA-compliant, and notably the first commercial foundry in North America fully powered by solar energy (operational since 2018 via four Minnesota Community Solar Gardens). MMP employs approximately 15 people and operates with a direct sales motion — quote-based pricing, no public list rates, with a 60-day price guarantee and a 48-hour quote turnaround commitment.

The business model is project-based custom manufacturing: revenue is generated per casting/part order, with quote-based pricing determined by part complexity, material, weight, and finishing requirements. MMP markets through a content-driven strategy (educational guides, engineering blog, testimonials), industry events (SFSA conference participation, Virginia Tech Cast in Steel Competition since 2020), and a Thomasnet directory listing. The proprietary Six Way Assurance Program — bundling on-time delivery, defect, quality, price-lock, and quoting-speed guarantees — is the central commercial differentiator, positioning the company as a risk-reducing problem-solver rather than a commodity casting supplier.

Name

Midwest Metal Products, Inc (MMP)

Legal name

Midwest Metal Products, Inc.

Website

https://midwestmetalproducts.com

Company type

Private

Founded year

1950

Operating status

Operating

Headcount range

11–50 employees

Short description

Midwest Metal Products is a privately held, metallurgist-owned custom metal casting foundry in Winona, Minnesota, providing integrated sand casting, heat treatment, finishing, and engineering services to enterprise OEMs across trenchless construction, energy, mining, food processing, and aerospace.

Ownership category

akta.pro rank

Product category

Custom Metal Casting Foundry Services

NAICS

Iron Foundries (331511)

SIC

Iron & Steel Foundries (3320)

akta.pro primary industry

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

akta.pro secondary industry

Heat Treatment & Thermal Processing Furnaces (Hardening, Annealing, Induction) (IMAHADAI)

Keywords

• Custom metal casting
• Sand casting foundry
• Industrial heat treatment
• Metal finishing services
• Weldment to casting

Headquarters

HQ city

Winona

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Metal Casting: Sand casting services producing complex metal components in iron and steel alloys. Castings range from 35 to 1,500 lbs (irons) and up to 1,100 lbs (steels). Revenue generated on a per-part, per-order basis.
2. Finishing Services: Value-added finishing including machining, painting, grinding, sand blasting, and assembly services. Can process castings MMP produces or those supplied by customers.
3. Heat Treatment Services: In-house heat treatment including case hardening, through hardening, annealing, normalizing, tempering, blue coating, quenching, oil quench, and air quench services.
4. Engineering and Design Services: Design assistance for castability, weldment-to-casting conversions, reverse engineering, solidification modeling, and prototyping. Includes complimentary evaluation certificates for weldment assessments.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

Midwest Metal Products operates a custom metal casting foundry producing sand castings in iron and steel alloys, ranging from 35 to 1,800 lbs, alongside in-house heat treatment (case hardening, annealing, tempering, quenching), finishing (machining, grinding, painting, sand blasting, assembly), and engineering/design services including weldment-to-casting conversions and 3D printed mold prototyping.

Product overview

Midwest Metal Products (MMP) is a custom metal casting foundry offering an integrated portfolio of services centered on sand casting, heat treatment, finishing, and engineering/design capabilities. The company operates as a foundry owned and staffed by metallurgists, providing end-to-end solutions from casting production through post-casting finishing including machining, painting, and assembly. MMP serves industrial sectors including trenchless construction, energy, food processing, waste-to-energy, and mining. Their services portfolio includes core sand casting capabilities, heat treatment for material property enhancement, comprehensive finishing services, engineering design assistance, and weldment-to-casting conversion evaluations. The company holds ISO 9001 certification and utilizes induction melting technology capable of producing castings up to 1,800 lbs for irons and 1,100 lbs for steels.

Differentiator

Problem solved

Functional benefit

Products and services

• Sand Casting Services Custom metal sand casting services for producing complex shapes in steel, iron, and various alloys for industrial applications including construction, mining, energy, food processing, and aerospace equipment.
• Heat Treatment Services Metal heat treatment services including case hardening, through hardening, annealing, normalizing, tempering, blue coating, oil quench, and air quench to enhance mechanical properties of cast components.
• Finishing Services Comprehensive finishing services including machining, painting, light assembly, Blanchard grinding, and sand blasting for producing finished cast components ready for installation.
• Engineering and Design Services Custom engineering and design services including reverse engineering, weldment to casting conversions, solidification modeling, castability design assistance, and prototyping support.
• Weldment to Casting Conversion Engineering evaluation service that converts labor-intensive multi-piece weldments to single-piece castings for improved reliability, precision, and cost reduction; includes complimentary $1,500 evaluation certificate.
• 3D Printed Mold Prototyping Rapid prototyping capability using 3D printed molds for faster lead time than conventional tooling, reducing upfront tooling costs and risk for customers developing complex cast parts.

Quantifiable outcome

• 5x longer part life in weldment-to-casting conversion (Steffes Corp oil field component)
• +2 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Innovative HydraulicscoreStrategic or Co-development Partner · 1 February 2026Development partner for NASA's Artemis program. MMP developed 17 parts for the Crawler-Transporter at Kennedy Space Center, including eight identical steel cylinders (6 feet long, 1,100 lbs each) that support the transporter moving NASA's most powerful rockets.
• Virginia Tech College of Material Science and EngineeringcoreStrategic or Co-development Partner · 8 April 2025Partnership for 2025 Cast in Steel Competition crafting a model of George Washington's sword. MMP provided CAD modeling, casting guidance, H13 steel materials, and Blanchard grinding. MMP previously worked with Virginia Tech in 2020 when their team won Best Performance for a Bowie Knife casting. MMP's David Michalski (Foundry Engineer) and Jeanne Wagner (Technical Director) led the support.
• Minnesota Southeast Technical CollegecoreStrategic or Co-development Partner · 10 March 2025Workforce development partnership providing real-world training opportunities for students. MMP partnered with the college's welding program, with 10 students completing production welding over two weeks. MMP's experienced welders provided guidance and quality inspections. MMP also reimburses the school with donations to their welding department for future equipment.
• BHE RenewablesminorStrategic or Co-development Partner · 1 February 2018Solar garden operator for MMP's four subscribed solar gardens that became operational in February 2018. BHE Renewables operates the dense photovoltaic (PV) solar panel arrays that supply power to the regional energy grid.
• Minnesota Community Solar Garden (MCSG)coreStrategic or Co-development Partner · 1 January 2015Renewable energy partnership through Minnesota's MCSG initiative. MMP subscribed to four solar gardens covering over 100% of energy requirements based on historical consumption. Each garden generates 1 MW of power on approximately 2.5 acres. The initiative positions Minnesota as a leader in renewable energy adoption.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Cast-Fab Technologies: Integrated casting, machining, and assembly provider serving industrial and commercial vehicle markets. Comparable as a Midwest-based integrated metal components supplier offering design-to-finish services similar to MMP's casting+finishing+engineering model.
• Grede Holdings: Major US producer of iron castings (gray and ductile iron) serving automotive, heavy truck, construction, and industrial markets. Comparable as an integrated iron foundry with similar end-market exposure to commercial vehicles, construction equipment, and industrial OEMs served by MMP.
• MetalTek International: Custom metal castings manufacturer producing sand, centrifugal, and investment castings in iron, steel, and high-alloy materials. Comparable as a US-based custom foundry offering integrated casting, machining, and engineering services to industrial OEMs across similar end markets.
• Stainless Foundry & Engineering: Specialty steel and high-alloy foundry producing investment, sand, and centrifugal castings for industrial, defense, and aerospace markets. Comparable as a smaller-scale US custom foundry serving demanding applications requiring metallurgical expertise, similar to MMP's positioning.
• Waupaca Foundry: One of the largest iron foundries in North America, producing gray iron, ductile iron, and austempered ductile iron castings for automotive, heavy equipment, and industrial markets. Comparable as a US-based iron casting supplier serving similar industrial OEM customers, though at substantially larger scale than MMP.
• Neenah Enterprises: Producer of iron castings and fabricated metal products serving industrial and infrastructure markets. Comparable as a US-based iron foundry with overlapping customer base in heavy equipment and municipal/infrastructure applications.

Emerging players

• Signicast: Investment castings specialist serving aerospace, defense, medical, and industrial markets with rapid-prototyping and high-volume production capabilities. Comparable as a US-based custom precision foundry, though focused on investment casting versus MMP's sand casting approach.

Others

• Vulcan Engineering: Provider of foundry equipment, engineering services, and turnkey foundry solutions to the metal casting industry. Comparable as an ecosystem participant supplying technology and process expertise to foundries including those serving similar end markets as MMP.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/midwest-metal-products-inc-mmp

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Midwest Metal Products, Inc (MMP)