HarbisonWalker International

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.

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

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

• Industrial refractory products
• Refractory installation services
• High temperature ceramics
• Monolithic refractory solutions
• Fire brick manufacturing

Headquarters

HQ city

Pittsburgh

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. 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.
2. Refractory Services: Contractor and installation services, technical support, fundamentals training, and ongoing maintenance and repair services for refractory systems.
3. 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

Core 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

Segments12 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Two partnerships are on record, tiered core and flagship.

• Electrified Thermal SolutionscoreStrategic or Co-development Partner · 25 March 2026HWI 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.
• CalderysflagshipStrategic or Co-development PartnerHWI 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

Direct 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

• Xx.com/thinkhwi
• YouTubeyoutube.com/@thinkHWI
• Facebookfacebook.com/thinkhwi
• LinkedInlinkedin.com/company/harbisonwalker-international

Revenue estimate

Valuation estimate

Number of profiles

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 HarbisonWalker International