What Surface Combustion does

Surface Combustion is a 110+ year-old, family-owned industrial furnace manufacturer headquartered in Maumee, Ohio, with manufacturing in Waterville, Ohio. The company designs, builds, and services thermal processing equipment — batch, continuous, atmosphere, and vacuum furnaces — used to heat treat metal components across aerospace, automotive, defense, oil & gas, agricultural, firearms, fastener, and gear applications, as well as specialized chemical weapons demilitarization systems for government customers. Its signature product, the Allcase® Batch Integral Quench Furnace, has been in continuous production since 1951 with more than 3,000 units installed globally, and the company holds over 675 U.S. patents and 75+ trademarks spanning furnace design, gas generation, and control systems.

The business combines one-time capital equipment sales with a recurring aftermarket stream of OEM parts, rebuild/retrofit services, and field engineering support. Go-to-market is direct field sales to enterprise and mid-market customers, with most engagements bundled to include engineering design, installation, commissioning, and ongoing technical support. Control and software offerings — the C6™ atmosphere controller, HTM®-Pro SCADA system, TAL®-Pro logging, ESA® dew point sensors, and the Surface Depths™ mobile app — provide a digital layer atop the installed base, while RX® and DX® gas generators, material handling equipment, and quenching systems round out the line.

Surface Combustion operates a 66,000 sq ft manufacturing facility (expanded with a 22,000 sq ft addition around 2021), serves 300,000+ installed units across 50 countries, and counts U.S. Army installations, Watervliet Arsenal, Anniston Munitions Center, Rock Island Arsenal, and JACADS among its named customers alongside commercial heat treaters and OEMs. The company is privately held, employs 100–110 people, and discloses no revenue or institutional investor ownership.

Name

Surface Combustion

Legal name

Surface Combustion, Inc.

Website

https://surfacecombustion.com

Company type

Private

Founded year

1915

Operating status

Operating

Headcount range

101–250 employees

Short description

Surface Combustion is a family-owned industrial furnace manufacturer founded in 1915, designing and servicing batch, continuous, atmosphere, and vacuum heat treat systems for aerospace, automotive, defense, and metalworking customers across 50 countries.

Ownership category

akta.pro rank

Product category

Industrial Heat Treating Furnaces

NAICS

Industrial Process Furnace and Oven Manufacturing (333994), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414)

SIC

Industrial Process Furnaces & Ovens (3567), Heating Equipment, Except Electric & Warm Air Furnaces (3433)

akta.pro primary industry

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

akta.pro secondary industries

Boilers, Furnaces & Process Heating Equipment (IMAHAKAD), Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC)

Keywords

• Industrial heat treating
• Thermal processing furnaces
• Batch heat treat furnaces
• Vacuum heat treat furnaces
• Atmosphere gas generators

Headquarters

HQ city

Maumee

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Heat Treat Furnace Sales: Sale of thermal processing equipment including batch furnaces, continuous furnaces, atmosphere furnaces, vacuum furnaces, gas generators, and control systems. Includes custom-engineered solutions tailored to customer specifications.
2. Aftermarket Parts and Service: Replacement parts inventory, rebuild and retrofit services, furnace maintenance, and technical support. Critical parts often shipped within 24 hours. Onsite stocking and management programs for large manufacturers.
3. Government Contracts: Furnace solutions for government applications including chemical weapons demilitarization, munitions disposal, and defense-related thermal processing. Includes past performance with U.S. Army, Watervliet Arsenal, and other government agencies.
4. Installation and Commissioning Services: Field service engineers provide installation, commissioning, and on-site support for furnace systems

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Surface Combustion designs, manufactures, and services industrial heat treating furnaces and thermal processing systems, including batch furnaces (Allcase BIQ, Batchmaster box, pit, lift-cover, car-bottom), continuous furnaces (mesh belt, cast belt, roller hearth, rotary hearth, pusher, slat conveyor, screw conveyor), vacuum furnaces (VacuDraw, Vacuum Allcase, Multi-Chamber, SoftVac), atmosphere gas generators (RX endothermic, DX exothermic), and microprocessor control systems. The company supplies custom-engineered thermal processing solutions to enterprise and government customers in automotive, aerospace, defense, oil & gas, agricultural, firearms, fasteners, gears, and chemical weapons demilitarization, with supporting rebuild/retrofit services and OEM aftermarket parts.

Product overview

Surface Combustion is a comprehensive industrial heat treatment and thermal processing equipment manufacturer offering a diverse portfolio of furnace systems and related products. The core product lines include the Allcase® Batch Integral Quench Furnace family (with companion ACT furnaces, RTB single-chamber variants, and VersaQuench models), batch box furnaces (Batchmaster™, lift cover, pit, and engineered-to-order designs), and continuous furnaces (mesh belt, cast belt, roller hearth, rotary hearth, rotary retort, pusher, slat conveyor, screw conveyor, and belt furnaces). Vacuum furnace offerings include VacuDraw® tempering, Vacuum Allcase®, Multi-Chamber (2-chamber and 3-chamber), SoftVac™ hot wall technology, and vacuum pit furnaces. Atmosphere generation is supported through RX® Endothermic and DX® Exothermic gas generators. Control systems encompass the C6™ batch atmosphere controller, HTM®-Pro supervisory system, TAL®-Pro logging software, and ESA® dew point sensors. Companion equipment includes charge cars (with AP Torque predictive maintenance), washers, quench systems, and material handling solutions. Services include rebuild/retrofit, aftermarket parts, and customer technical support. The company supports extensive heat treatment processes including carburizing, carbonitriding, nitriding, ion nitriding, annealing, normalizing, brazing, sintering, and specialized processes like ferritic nitrocarburizing (FNC) and T6 heat treatment.

Differentiator

Problem solved

Functional benefit

Brands

• Allcase®: Batch Integral Quench Furnace - the company's signature product and industry standard for versatile, reliable, high production controlled atmosphere heat treating.
• RX®
• DX®
• VacuDraw®
• Surface Depths™
• C6™
• HTM®-Pro
• TAL®-Pro

Products and services

• Allcase® Batch Integral Quench Furnace Surface's signature batch integral quench furnace for hardening, annealing, carburizing, carbonitriding, and ferritic nitrocarburizing, available in six standard effective work sizes with vertical and horizontal radiant tube configurations at temperatures up to 1950°F. Used by automotive, aerospace, commercial heat treaters, and tier-1 manufacturers worldwide.
• Allcase® Companion ACT Furnace Companion equipment to the Allcase BIQ furnace providing additional processing capabilities for batch heat treating lines. Used by commercial heat treaters and manufacturers operating Allcase furnace systems.
• VersaQuench® Quick Quench Furnace Efficient batch furnace for non-ferrous heat treat challenges including solutionizing and quenching. Used for aluminum and non-ferrous alloy heat treating.
• Batchmaster™ Box Furnace Single-chamber large box furnace with cost-efficient, reliable pre-engineered design. Standard loading widths 24-72 inches, up to 20,000 pounds capacity, maximum 2400°F. For general industrial batch heat treating.
• Uni-DRAW® Batch Tempering Furnaces Batch tempering furnaces for post-heat-treat tempering operations on industrial metal components.
• Lift Cover, Tilt Top & Carbottom Furnaces Heavy-duty batch furnaces designed for large workpiece loading and unloading operations. For large industrial components such as forgings, castings, and heavy machinery parts.
• Pit Furnaces Vertical cylindrical batch furnaces for processing long or heavy workpieces. For deep-hole components, shafts, and large cylindrical parts.
• Cover and Base Furnaces Batch furnaces with removable covers for processing large or irregularly shaped workpieces.
• Engineered-to-Order Box Furnaces Custom-designed box furnaces built to customer specifications for unique thermal processing requirements.
• RTB™ Single-Chamber Atmosphere Box Furnace Single-chamber atmosphere box furnace with external quenching system for controlled atmosphere heat treating.
• Mesh Belt Furnace Continuous mesh belt conveyor furnace for high-volume production heat treating of small to medium parts.

Quantifiable outcome

• Over 3,000 Allcase BIQ furnaces installed processing 496,040 tons of steel annually
• +3 more outcomes

Named customers12 records

Segments9 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature8 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• ASM Heat Treating SocietycoreGTM or Marketing Partner · 21 October 2025Surface is Title Sponsor of ASM Heat Treat 2025 evening networking event and Corporate Sponsor of Heat Treat Mexico 2026. Events powered by ASM Heat Treating Society, ASM Mexico Chapter, and Heat Treat North America Organizers.
• Center for Heat Treat Excellence (Worcester, MA)minorStrategic or Co-development PartnerSurface maintains relationships with research groups and participates in developing heat treatment processes for additive manufacturing parts.
• Metal Treating Institute (MTI)coreGTM or Marketing PartnerSurface supports MTI's 6-episode Jobs of Tomorrow docuseries featuring VP Ben Bernard, promoting heat treatment careers and industry awareness. Partnership positions Surface as an industry thought leader.
• ASM Heat Treating SocietycoreStrategic or Co-development PartnerSurface co-sponsors the ASM HTS/Surface Combustion Emerging Leader Award recognizing outstanding early-to-midcareer heat treating professionals, created for the company's 100-year anniversary in 2015.
• Industrial Heating Equipment Association (IHEA)coreStrategic or Co-development PartnerSurface is an original and sustaining voting member of IHEA and NFPA86 standards organizations. Company representatives present at IHEA Fall Seminar on combustion technology and safety standards.
• Watervliet ArsenalcoreImplementation/ SI/ Consulting PartnerOver 40-year relationship providing Ion Nitriding Thermal Processing Furnace System. Watervliet Arsenal awarded contract to Surface to bring processing capability in-house, controlling their supply chain.
• Cambridge Heat Treating (Cambridge, Ontario)coreImplementation/ SI/ Consulting PartnerSurface supplied four Allcase Batch Integral Quench Furnaces for expanded heat treat line, including commissioning of new furnaces and support for used equipment at new location.
• East Carolina Metal Treating (Raleigh, NC)coreImplementation/ SI/ Consulting PartnerRepeat customer relationship with repeat order for Allcase Batch Integral Quench Furnace. Surface incorporated purchaser-specified controls system matching existing UPC controls.

Scale indicators12 records

Recent moves12 records

Expansion highlights5 records

Direct peers

• Ipsen: Ipsen is a global manufacturer of industrial heat treatment furnaces, including vacuum, atmosphere, and batch systems serving aerospace, automotive, and medical markets. It is the closest direct competitor to Surface Combustion, with overlapping product lines (vacuum and batch IQ furnaces), channels (direct field sales to OEMs), and customer base.
• Seco/Warwick: Seco/Warwick designs and manufactures industrial heat treatment furnaces for metals, including vacuum, atmosphere, and aluminum heat treat systems. It directly competes with Surface Combustion across batch and continuous furnace categories and shares end markets in aerospace and automotive.
• ALD Vacuum Technologies: ALD is a specialist in vacuum metallurgical furnaces, including vacuum heat treatment and sintering systems. It competes most directly with Surface Combustion's Vacuum Allcase, VacuDraw, and multi-chamber vacuum furnace lines for aerospace and tool steel applications.
• Can-Eng Furnaces: Can-Eng designs batch and continuous heat treat furnaces for automotive, aerospace, and energy customers. It directly competes with Surface Combustion in mesh belt, pusher, and batch furnace categories and serves many of the same North American OEM customers.
• Nutec Bickley: Nutec Bickley manufactures industrial heat treatment furnaces and ceramic processing furnaces, including batch and continuous designs. It overlaps with Surface Combustion in thermal processing for metals and shares aerospace and automotive end markets.
• BMI Fours Industriels: BMI designs and builds industrial heat treatment furnaces for ferrous and non-ferrous applications, with strong presence in Europe and Latin America. It competes with Surface Combustion on batch and continuous furnace lines in the global automotive and steel markets.
• Consarc Corporation: Consarc manufactures vacuum furnaces and specialty melting/heat treating equipment for aerospace, medical, and energy applications. It is comparable to Surface Combustion's vacuum furnace portfolio (VacuDraw, Vacuum Allcase) and competes for similar high-spec vacuum heat treat work.

Broad incumbents

• Inductotherm Group: Inductotherm is a large diversified manufacturer of thermal processing equipment, including induction melting and heating systems. While broader than Surface Combustion's gas-fired and resistance furnace focus, it competes for the same industrial heat processing wallet share, especially in metals melting and forging.

Regional players

• Ajax Manufacturing: Ajax Manufacturing produces industrial heat treat furnaces primarily for North American forging and steel customers. It is comparable as a regional batch/continuous furnace competitor, with overlapping end-market exposure but less global footprint than Surface Combustion.

Others

• Linde (Praxair) Heat Treating Services: Linde supplies industrial gases and atmosphere gas generation services to heat treat shops, including endothermic and exothermic gas. While not a furnace OEM, it is an adjacent ecosystem player that competes with Surface Combustion's RX and DX gas generator product lines and shares the same commercial heat treat customer base.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Surface Combustion