What Macalloy Ltd does

Macalloy Ltd is a UK-based specialty engineering manufacturer founded in 1921 in Sheffield, producing threaded tension steel bars, stainless cables, and compression struts for the global construction industry. Its core products include the Macalloy 460, 520, 550 and S460 bar systems for architectural tension structures, the 1030 and S1030 high-strength post-tensioning systems, the S650 stainless threaded bar for ground engineering, the SC460 stainless cable range, and the recently launched Macalloy Fatigue System and Grade 8.8 Threaded Studding. The company's underlying technology centres on cold-rolled thread manufacturing (rolled rather than cut, yielding fatigue resistance verified beyond 2 million cycles), a patented Macalloy thread form with low lock-off losses, and lost foam casting for fatigue fork production. Supporting services include site installation, tensioning, load-checking, inspection, maintenance, equipment hire, and technical training.

The company operates from a purpose-built factory commissioned in 2006 at the Old Dinnington Colliery site in the Sheffield region, exporting 85% of production through a combination of direct sales and an international agent and distributor network spanning more than 30 countries across Europe, the Middle East, Asia Pacific, North America, and Africa. Customers are predominantly enterprise-tier: structural engineers, architects, contractors, and project owners specifying materials for bridges, airports, stadiums, hotels, museums, and large public buildings. Pricing is quote-based and project-specific, with no public price list, supported by a sales operation that responds within 24 working hours. Macalloy holds CE 1090, BS EN 1090 EXC3, ISO 9001:2015, ETA 21/0053, ETA 21/0054, UKTA-22/0012, UKTA-22/0013, ASQPE (France), and BBA certifications, and operates CPD programs approved by RIBA and AIA to influence specification at the design stage. The company returned to private ownership via a 2003 management buyout led by Managing Director Peter Hoy, and reports FY2024 turnover of £12m.

Name

Macalloy Ltd

Legal name

Macalloy Ltd

Website

https://macalloy.com

Company type

Private

Founded year

1921

Operating status

Operating

Headcount range

101–250 employees

Short description

Macalloy Ltd is a Sheffield-based manufacturer founded in 1921 that designs and produces threaded tension steel bars, stainless cable systems, and compression struts for global bridges, airports, stadiums, and architectural projects, exporting 85% of production.

Ownership category

akta.pro rank

Product category

Structural Tension Systems

NAICS

Fabricated Structural Metal Manufacturing (332312), Steel Product Manufacturing from Purchased Steel (3312)

SIC

Bolts, Nuts, Screws, Rivets & Washers (3452), Fabricated Structural Metal Products (3440)

akta.pro primary industry

Fasteners, Anchors & Connectors (Bolts, Weld Studs, Plates) (IMADACAJ)

akta.pro secondary industries

Bridge & Infrastructure Steel Components (IMADACAL), Specialty & Alloy Steel (Stainless, Tool Steel, Electrical Steel, High-Strength/HSLA) (IMAKABAJ)

Keywords

• Threaded tension bars
• Post-tensioning systems
• Stainless steel cables
• Structural compression struts
• Ground engineering anchors

Headquarters

HQ city

Sheffield

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Threaded Steel Bar Systems: Sale of threaded tension steel bars and cable systems including Macalloy 460, 520, 550, S460, 1030, S1030, S650 systems. Products sold directly and through international distribution network. Exports account for 85% of products.
2. Site Services: Inspection, maintenance, equipment hire and purchase, technician site visits, installation services, training, and load-checking for Macalloy installed systems worldwide.
3. Architectural Building Solutions: Free quotations with expert guidance for small and large scale architectural applications. Design support for tension rod systems in various architectural applications.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels7 records

Core offering

Macalloy manufactures threaded tension steel bar systems and stainless steel cable systems in multiple grades (460, 520, 550, S460, 1030, S1030, S650) for architectural and structural applications including bridges, stadia, airports, buildings, and ground engineering. The company complements its hardware range with site services (installation, tensioning, load-checking, inspection, maintenance, training), design support, BIM integration, and certified fire protection castings.

Product overview

Macalloy Ltd is a UK-based engineering company (established 1921, Sheffield) manufacturing threaded tension steel bars and cable systems for the construction industry. The product portfolio centres on Tension Structures (Macalloy 460, 520, 550, S460 Bar Systems and SC460 Stainless Cables), Post Tensioning (Macalloy 1030 and S1030), Compression Struts (Architectural and Fixed), and Ground Engineering (S650 Stainless Threaded Bar, Sheet Piling Tie Bar System). Supporting services include Site Services (equipment hire, inspection, maintenance), Architectural Building Solutions, Interact Structural Fire Protection, Tekla Software BIM Integration, and CPD training programmes. The company operates from purpose-built facilities in Dinnington, Sheffield and exports 85% of products internationally. The Macalloy Fatigue System represents their latest innovation for fatigue-rated bridge applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Tension Structures Comprehensive range of threaded tension bar systems including carbon and stainless steel options (460, 520, 550, S460) used in architectural and structural applications such as bridges, stadia, airports, and buildings, supplied to architects, engineers and contractors worldwide.
• Macalloy 460 Bar System Hot rolled carbon steel tension bar with Minimum Yield Stress 460 N/mm² and Minimum Breaking Stress 610 N/mm², featuring rolled thread technology for fatigue resistance, in standard diameter range M10 to M100 for structural and architectural applications.
• Macalloy 520 Bar System Carbon steel tension bar system with the same geometry and design as the 460 system, Minimum Yield Stress 520 N/mm² and Minimum Breaking Stress 660 N/mm², available in diameters M10 to M100 for higher-load structural applications.
• Macalloy 550 Bar System (Mac550 Architectural Tension System) Higher capacity architectural tension system with rolled thread technology in both carbon and stainless variants, providing increased yield and ultimate strength over 460/520 systems across diameters M10 to M120, including larger M70/80/95 and M110/120mm sizes for reduced bar diameter and significant cost savings.
• Macalloy S460 Bar System Austenitic stainless steel tension bar system providing optimum balance of strength, durability and appearance, in standard diameters M10 to M76, standard lengths of 6m, with a Grit 220 polished finish for architectural applications.
• Macalloy SC460 Stainless Cable Stainless steel cable system using the same Macalloy fork end as tension bars and compression struts, available in 1x19 spiral strand, compact strand, and 7x19 strand configurations, allowing combinations of all three systems for architectural applications.
• Macalloy 1030 Post Tensioning System High strength post-tensioning bar system with Minimum Ultimate Tensile Strength of 1030 N/mm², in carbon chrome steel with diameters from 26.5mm to 75mm and lengths up to 11.8m, featuring a fatigue-resistant patented Macalloy thread form with low lock-off losses; used in geotechnical and structural applications.
• Macalloy S1030 Stainless Post Tensioning System Martensitic nickel-chrome alloy steel post-tensioning bar hardened during manufacturing, in diameters 20mm to 75mm and lengths of 6m (custom sizes on request), offering high strength with corrosion resistance for demanding post-tensioning applications.
• Macalloy Architectural Compression Strut Adjustable compression strut with aesthetically pleasing long taper to each end, using the same fork end system as tension bars and cables, available in carbon, galvanised or stainless steel with CHS diameters from 33.7mm to 323.9mm and an adjustable locking collar that hides the thread connection.
• Macalloy Fixed Compression Strut Cost-effective architectural alternative to standard hollow tube sections, with a fork designed with the same dimensions as the standard Macalloy fork end for compatibility, available in carbon steel with a galvanised option in standard sizes 33.7mm to 323.9mm CHS diameters.
• Macalloy S650 Stainless Threaded Bar High-strength fully-threaded stainless steel anchor system with minimum characteristic yield strength of 650 N/mm², with cold-rolled thread to prevent site damage during installation, available in sizes from 16mm to 50mm for soil nails, rock bolts, ground anchors, embankment stabilisation, tunnelling, underpinning, mini piles, seismic and wind turbine applications.
• Grade 8.8 Threaded Studding Galvanised Grade 8.8 threaded studding manufactured to ISO 898-1, in both fully threaded and end threaded configurations, standard diameters M12 to M56, with standard lengths up to 6m for fully threaded and up to 11.8m for end-threaded, for construction and structural connections.
• Macalloy Sheet Piling Tie Bar System Tie bar system for sheet piling construction available in four yield strengths (TB460, TB520, TB590, TB700 N/mm²), with thread diameters M42 to M105 as standard, bars up to 11.8m and couplers for longer lengths, used in retaining wall and foundation applications.
• Macalloy Fatigue System Fatigue-rated tension bar system fully compliant with BS EN1993-1-9 EUROCODE 3, supporting bar diameters up to 140mm with strength grades of 460, 520 and 550 N/mm², featuring the Macalloy Fatigue Fork crafted using advanced lost foam technology for structures exposed to cyclic loading such as bridges.
• Site Services Comprehensive site services including equipment hire and purchase (Technotensioners, Hydraulic Jacks, Torque Guns), technician site visits, inspection and maintenance, drone inspection, load-checking, tensioning and de-tensioning, on-site training, and extended warranties for Macalloy installed systems worldwide.
• Architectural Building Solutions Free quotations with expert design guidance for small and large scale architectural applications including balconies, canopies, stairs, roof trusses, cross bracing and suspended structures, supplying pre-assembled bar systems for easy installation by contractors.
• Interact Structural Fire Protection Patent-protected fire protection products for tension and suspension rods providing up to 2 hours fire protection, including Easy-Over, Retro-Fit and Hinge Casting systems (covered by UK Patent Publication No. 2604167 and European Patent Publication No. 4060131), with durable aesthetic finishes suitable for external and internal use.
• Tekla Structures BIM Objects Native Building Information Models (BIM) for Macalloy tension rod, compression strut and stainless cable ranges for use with Trimble Tekla Structures software, offering designers snap-to points and the latest functionality for integration into building information modelling workflows.
• CPD (Continuing Professional Development) RIBA-approved and AIA CES-approved continuing professional development presentations for architects, engineers and contractors covering structural steel members in bridges, use of tension rods in AESS applications, and product training, delivered as lunch-and-learn sessions or webinars.

Quantifiable outcome

• Carbon footprint 80% lower than global average through green steel manufacturing
• +2 more outcomes

Named customers17 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature6 records

Partnerships

Four partnerships are on record, tiered core and minor.

• Trimble (Tekla Software)coreTechnology or IntegrationMacalloy has been working closely with Trimble, an industrial technology company, to develop BIM models for tension rod and compression strut range for use with Tekla Structures software. Native objects offer designers easy snap-to points and the latest functionality.
• Structure WorkshopcoreStrategic or Co-development PartnerLondon-based engineering firm collaborated with Macalloy on the Natural History Museum Diplodocus project to develop bespoke curved post-tensioning bars for the unique sculpture support structure.
• Factum ArtecoreImplementation/ SI/ Consulting PartnerWorked with Macalloy on Natural History Museum project to design and create the Diplodocus cast in bronze, requiring Macalloy's engineering expertise for internal support structure.
• FademesaminorImplementation/ SI/ Consulting PartnerMadrid-based foundry that created the bronze Diplodocus cast for Natural History Museum project in collaboration with Macalloy's internal support bar systems.

Scale indicators6 records

Recent moves11 records

Expansion highlights6 records

Market position

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UCZUqZwEbUz2QqoPHAf6E8IQ
• Facebookfacebook.com/people/Macalloy/100069089727217
• LinkedInlinkedin.com/company/macalloy
• Instagraminstagram.com/macalloy_uk
• Xx.com/Macalloy_Bar

Compliance11 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 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 Macalloy Ltd