HarbisonWalker International
HarbisonWalker International (HWI) is a North American refractory products and services supplier serving steel, cement, glass, power, and other heavy industrial sectors. Founded in 1866 and headquartered in Pittsburgh, HWI operates as a member of the Calderys international refractory group, offering fire bricks, castables, mortars, and installation services.
- Company typePrivate
- Founded1866
- HeadquartersPittsburgh, United States
- Headcount1,001–5,000
- GTM typeB2B
- OfferingHardware or Manufacturing
What HarbisonWalker International does
HarbisonWalker International (HWI) is a North American supplier of refractory products and services, operating since 1866 and headquartered in Pittsburgh, Pennsylvania. The company manufactures and distributes fire bricks, high-temperature mortars, monolithic castables, and pre-formed shapes engineered to withstand extreme heat, thermal shock, and corrosive conditions in high-temperature industrial processes. HWI serves heavy industrial sectors — with iron & steel as its primary vertical and 11+ additional verticals including cement, glass, power generation, aluminum, copper, ferrous foundry, refineries, petrochemicals, chemicals, gasifiers, incineration, lime, pulp and paper, space exploration, and thermal energy storage.
HWI operates as a member of Calderys, an international refractory group that provides global supply chain reach and shared technology development. Its go-to-market is enterprise B2B, combining a direct sales organization for major accounts with a network of regional distribution centers and a certified contractor/installer partner network that delivers installation, maintenance, and repair services. The company complements product sales with technical support, fundamentals training, and Safety Data Sheet management for customer supply chains. Pricing is quote-based and not publicly disclosed, typical of customized industrial B2B contracts.
HWI is actively investing in product innovation and adjacent-market expansion. In May 2026 it launched AZTECH-S, a next-generation refractory for glass furnace superstructures. In March 2026 it entered a partnership with Electrified Thermal Solutions to develop a U.S.-based E-Brick supply chain for industrial thermal batteries. With 1,001-5,000 employees, a 160-year brand heritage, and Calderys group backing, HWI is positioned as one of the largest and most diversified refractory solutions providers in North America.
HarbisonWalker International firmographics
Firmographics- Name
- HarbisonWalker International
- Legal name
- HarbisonWalker International
- Website
- https://thinkHWI.com
- Company type
- Private
- Founded year
- 1866
- Operating status
- Operating
- Headcount range
- 1,001–5,000 employees
- Short description
- HarbisonWalker International (HWI) is a North American refractory products and services supplier serving steel, cement, glass, power, and other heavy industrial sectors. Founded in 1866 and headquartered in Pittsburgh, HWI operates as a member of the Calderys international refractory group, offering fire bricks, castables, mortars, and installation services.
- Ownership category
- akta.pro rank
HarbisonWalker International industry classification
Industry- Product category
- Industrial Refractories
- NAICS
- Clay Building Material and Refractories Manufacturing (327120), Clay Product and Refractory Manufacturing (3271)
- akta.pro primary industry
- Refractory Bricks & Firebricks (IMADABAG)
- akta.pro secondary industry
- Refractory, Furnace & Kiln Maintenance Services (IMAIACAG)
Keywords
Where HarbisonWalker International is headquartered
LocationHeadquarters
- HQ city
- Pittsburgh
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
HarbisonWalker International business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Operations, Supply Chain, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Refractory Products: Sale of refractory products including fire bricks, high-temperature mortars, monolithic castables, and pre-formed shapes to industrial customers in steel, cement, glass, and other high-temperature processing industries.
- Refractory Services: Contractor and installation services, technical support, fundamentals training, and ongoing maintenance and repair services for refractory systems.
- Distribution and Logistics: Distribution centers providing refractory products and Safety Data Sheets (SDS) management for customer supply chain needs.
Go-to-market motion1 record
Distribution channels4 records
Marketing channels8 records
HarbisonWalker International product offering
Product offeringCore offering
HarbisonWalker International manufactures and supplies refractory products including fire bricks, high-temperature mortars, monolithic castables, and pre-formed shapes engineered for extreme heat and corrosive environments in steelmaking, cement kilns, glass furnaces, and power generation. The company complements its product portfolio with a contractor/installer network, fundamentals training, and ongoing technical and maintenance services for refractory systems.
Product overview
HWI (HarbisonWalker International) is a refractory products company and member of Calderys, offering one of the industry's widest and deepest lines of refractory solutions. The portfolio centers on refractory products including AZTECH-S (a next-generation refractory for glass furnace superstructures) and extends across a broad range of refractory products for industries such as iron & steel, aluminum, copper and heavy non-ferrous, ferrous foundry, glass, power generation, refineries and petrochemicals, chemicals, gasifiers, incineration, cement, pulp and paper, lime, space exploration, and thermal storage. The company complements its product offerings with refractory services including a contractor/installer network and fundamentals training.
Differentiator
Problem solved
Functional benefit
Products and services
- AZTECH-S A next-generation refractory specifically engineered for glass furnace superstructures in glass manufacturing facilities, designed to deliver high-temperature stability and corrosion resistance in molten glass environments.
- Refractory Products Portfolio World-class refractory products including fire bricks, high-temperature mortars, monolithic castables, and pre-formed shapes designed to perform in the toughest high-temperature environments across industries such as iron and steel, aluminum, cement, glass, power generation, refineries and petrochemicals, chemicals, gasifiers, ferrous foundry, copper and heavy non-ferrous, incineration, pulp and paper, lime, space exploration, and thermal storage.
- Contractor / Installer Network Services A network of certified refractory contractors and installers providing on-site installation, maintenance, and repair services for HWI refractory systems at industrial customer facilities.
- Refractory Fundamentals Training Educational training program delivering refractory fundamentals to customer teams, contractor partners, and installer networks to support safe and effective use of HWI refractory systems.
Quantifiable outcome
- Global refractories market projected to grow at 6% CAGR, driven by steel, cement, and infrastructure sectors
- +1 more outcomes
Companies that use HarbisonWalker International
Customer profileSegments12 records
Ideal customer profiles2 records
HarbisonWalker International technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
HarbisonWalker International partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered core and flagship.
- Electrified Thermal SolutionscoreHWI signed a partnership with Electrified Thermal Solutions to develop a scalable, U.S.-based supply chain for high-performance E-Bricks. Electrified Thermal Solutions is launching a new headquarters and E-Brick production facility in Medford, Massachusetts, targeting over 500 MWh of thermal battery deployments annually and 2 GW of thermal power capacity by 2030. This partnership supports domestic supply chain development for thermal energy storage applications.
- CalderysflagshipHWI is a member of Calderys, an international refractory group providing world-class refractory products and solutions. As part of Calderys, HWI benefits from global reach, shared resources, technology development, and international market access while maintaining its North American brand and operations.
Scale indicators4 records
Recent moves5 records
Expansion highlights5 records
HarbisonWalker International competitors and assessment
Company assessmentDirect peers
- RHI Magnesita: World's largest refractory producer, serving the same steel, cement, glass, and non-ferrous metal end-markets as HWI. Direct global competitor with overlapping product portfolio in fire bricks, monolithics, and pre-formed shapes.
- Vesuvius: UK-based global refractory and consumables supplier serving steel, foundry, and glass industries. Direct competitor with comparable high-temperature industrial solutions and similar multi-vertical customer base.
- Resco Products: Pennsylvania-based North American refractory manufacturer producing fireclay, high-alumina, and specialty refractory products. Direct competitor focused on overlapping US industrial customers in steel, foundry, and cement.
- Imerys: French specialty minerals company with a refractory and high-temperature solutions division serving similar industrial end-markets. Competes with HWI in performance mineral-based refractory formulations.
- Morgan Advanced Materials: UK-based advanced materials company producing specialty ceramics and refractory products for high-temperature industrial applications. Comparable in specialty refractory formulations and engineered thermal solutions.
Broad incumbents
- Saint-Gobain: Large French building and high-performance materials group with refractory product lines serving industrial customers. Competes in refractory applications but as part of a much broader materials portfolio.
Regional players
- Magnezit Group: Russian-based refractory producer serving global steel, cement, and non-ferrous metals industries. Comparable product focus in magnesia-based refractories with primary geographic footprint outside North America.
- Shinagawa Refractories: Japan's largest refractory manufacturer, serving steel, cement, and other high-temperature industries in Asia. Comparable product portfolio with regional rather than North American geographic focus.
- Puyang Refractories Group: Major Chinese refractory producer serving steel, cement, and chemical industries. Comparable product range with primary focus on the Chinese market rather than North America.
- Krosaki Harima: Japanese refractory and ceramics manufacturer serving steel, cement, and non-ferrous metals industries. Comparable in monolithic castables and shaped refractories, with Asia-centric geographic footprint.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
HarbisonWalker International social profiles
Digital presenceHarbisonWalker International financial estimates
Financial estimateRevenue estimate
Valuation estimate
HarbisonWalker International leadership team
Management profileNumber of profiles
HarbisonWalker International funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
HarbisonWalker International M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about HarbisonWalker International
What does HarbisonWalker International do?
HarbisonWalker International manufactures and supplies refractory products including fire bricks, high-temperature mortars, monolithic castables, and pre-formed shapes engineered for extreme heat and corrosive environments in steelmaking, cement kilns, glass furnaces, and power generation. The company complements its product portfolio with a contractor/installer network, fundamentals training, and ongoing technical and maintenance services for refractory systems.
Is HarbisonWalker International a public or private company?
HarbisonWalker International is a private company. It is classified as corporate owned and is currently operating.
When was HarbisonWalker International founded?
HarbisonWalker International was founded in 1866. It employs 1,001 to 5,000 people.
Where is HarbisonWalker International based?
HarbisonWalker International is headquartered in Pittsburgh, United States, in the North America region.
How does HarbisonWalker International make money?
Three revenue lines are on record. Refractory Products are the primary driver. The others are refractory Services and distribution and Logistics.
Who are HarbisonWalker International's main competitors?
Direct peers on record are RHI Magnesita, Vesuvius, Resco Products, Imerys and Morgan Advanced Materials. Saint-Gobain is listed as a broad incumbent. Regional players are Magnezit Group, Shinagawa Refractories, Puyang Refractories Group and Krosaki Harima.
Does HarbisonWalker International have an API?
No public API is recorded for HarbisonWalker International.
What industry is HarbisonWalker International in?
HarbisonWalker International's product category is Industrial Refractories. Its primary akta.pro industry code is IMADABAG, Refractory Bricks & Firebricks, with a secondary code of IMAIACAG, Refractory, Furnace & Kiln Maintenance Services. Its NAICS code is 327120.