Haworth Castings

What Haworth Castings does

Haworth Castings is a UK-based aluminium foundry specialising in high-specification sand castings and gravity die castings for performance-critical applications. Founded in 1954 and headquartered in Romsey, Hampshire, with a second foundry in Basingstoke, the company operates across six regulated end-markets: aerospace, defence, energy, marine, medical, and automotive/EV. Casting weights range from 0.5kg to 400kg, with production of complex geometries using proprietary running system designs (Kalpur, ring runner, bottom-fed), shell core and cold box core making, rotary impeller degassing, and grain refinement processes.

The business runs an integrated operation spanning casting, in-house CNC machining, heat treatment, UKAS-approved testing and inspection, and finishing services including HiPping, impregnation, shot blasting, anodising, painting, and moly spraying. Quality credentials include ISO 9001, UKAS testing approval, JOSCAR registration for UK Ministry of Defence programmes, and Cast Metals Federation membership. The company is a wholly-owned subsidiary of Expromet Technologies Group, a UK precision engineering platform founded in 2016 that also owns Investacast, Metaltech Precision, NC Precision, and (as of January 2026) Tiverton Fabrications.

Revenue is generated through project-based custom manufacturing with quote-based pricing tied to casting complexity, volume, alloy specification, and finishing requirements, settled on 30-day payment terms. Sales follow an enterprise field-sales motion targeting OEMs and tier suppliers in regulated industries, with no retail or self-service channels. Growth and capacity extension are pursued partly through the Expromet Group's audited global sourcing network across Europe and Asia, enabling hybrid UK/overseas production models for cost-sensitive, high-volume orders.

Name

Haworth Castings

Legal name

Haworth Castings Limited

Website

https://haworthcastings.co.uk

Company type

Private

Founded year

1954

Operating status

Operating

Headcount range

11–50 employees

Short description

Haworth Castings is a UK aluminium sand and gravity die casting foundry serving aerospace, defence, energy, marine, medical and automotive OEMs with precision castings, in-house machining, UKAS-approved testing and finishing, operating as part of Expromet Technologies Group.

Ownership category

akta.pro rank

Product category

Industrial Metal Castings

NAICS

Aluminum Foundries (except Die-Casting) (331524), Nonferrous Metal Die-Casting Foundries (331523), Coating, Engraving, Heat Treating, and Allied Activities (3328)

SIC

Nonferrous Foundries (Castings) (3360)

akta.pro primary industry

Aluminum Casting & Ingot/Billet/Slab Production (IMAKACAE)

akta.pro secondary industry

Aluminum Fabrication & Finishing (Machining, Anodizing, Coating) (IMAKACAI)

Keywords

• Aluminium sand castings
• Gravity die castings
• CNC machining services
• Metal casting foundry
• Finishing services

Headquarters

HQ city

Romsey

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, Infrastructure

Revenue model

1. Custom Aluminium Casting Manufacturing: Project-based manufacturing of precision aluminium sand castings and gravity die castings. Pricing is quote-based, determined by complexity, volume, alloy specification, and finishing requirements. Payment terms are 30 days from invoice date.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Haworth Castings is a UK aluminium foundry that manufactures precision sand castings and gravity die castings in aluminium (and select copper-based alloys), ranging from 0.5kg to 400kg, for performance-critical sectors including aerospace, defence, energy, marine, medical and automotive. The company offers fully integrated in-house services covering casting, CNC machining, heat treatment, UKAS-approved testing and inspection, and finishing processes (HiPping, impregnation, linishing/fettling, shot blasting/peening, painting, anodising, alochroming, moly spraying), delivering finished assemblies from a single supplier.

Product overview

Haworth Castings is a UK aluminium sand casting and gravity die casting foundry offering end-to-end precision manufacturing. Its core products are aluminium sand castings and gravity die castings, supported by a comprehensive suite of manufacturing processes including casting core making, heat treatment, CNC machining, and finishing services (HiPping, impregnation, linishing, shot blasting, painting, surface treatments, and moly spraying). The company provides UKAS-approved testing and inspection services. Haworth Castings operates as part of Expromet Technologies Group alongside sister companies Investacast (investment/pressure die casting), Metaltech Precision (CNC machining/fabrication), and Tiverton Fabrications (welded assemblies), enabling integrated manufacturing solutions across multiple processes.

Differentiator

Problem solved

Functional benefit

Products and services

• Aluminium Sand Castings High specification aluminium sand castings manufacturing using precision patterns and advanced sand moulding techniques for complex geometries, serving aerospace, defence, energy, marine, medical and automotive customers in the 0.5kg to 400kg weight range.
• Gravity Die Castings Aluminium gravity die castings production using permanent metal tooling, offering improved dimensional consistency and surface finish compared to sand casting for enterprise customers.
• Casting Core Making Core making capabilities encompassing shell cores, blown cold boxes and manually filled cores used to create internal cavities and complex features in castings.
• Heat Treatment Heat treatment services to enhance mechanical properties of sand and gravity die castings, improving strength, hardness and durability.
• Testing and Inspection UKAS-approved independent sand casting testing and inspection services including dimensional verification, non-destructive testing (radiographic, ultrasonic, dye penetrant) and material certification.
• CNC Machining Full range of CNC machining services including turning, milling, grinding and drilling to achieve precise tolerances on cast components.
• CMM Inspection Coordinate Measuring Machine inspection using CMMs, micrometers, verniers and gauges for thorough dimensional verification and quality assurance.
• HiPping (Hot Isostatic Pressing) Hot Isostatic Pressing process to enhance aluminium casting integrity, improve proof stresses and optimise mechanical properties.
• Impregnation Impregnation process that fills microporosity and small voids to ensure components do not leak in service, particularly for pressure or fluid-carrying parts.
• Linishing and Fettling Surface preparation services removing gates, risers and excess material through grinding, the first stage in the finishing process.
• Shot Blasting and Peening Surface treatment process where spherical metal shots are propelled at high speed to clean, strengthen and prepare casting surfaces.
• Painting Painted finishing services for aluminium castings providing aesthetic and protective surface coatings.
• Surface Treatments Electrolysis and chemical coating treatments including anodising and alochroming to protect casting surfaces from corrosion and wear.
• Moly Spraying Molybdenum disulfide (moly) spraying process to increase wear resistance of aluminium castings for demanding applications.

Quantifiable outcome

• Full-service capability from casting through machining and finishing under one roof reduces supplier management complexity
• +2 more outcomes

Named customers6 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Six partnerships are on record, tiered core and minor.

• Tiverton Fabrications LimitedcoreStrategic or Co-development Partner · 28 January 2026Acquired by Expromet Technologies Group in January 2026. Specialises in performance-critical welded solutions including bespoke vessels, vacuum chambers, cylinders and tubes in aluminium, stainless steel and speciality alloys. Located in Tiverton, Devon with 3,000 sq. ft. machine shop and helium leak testing facility.
• Expromet Technologies GroupcoreStrategic or Co-development PartnerParent company of Haworth Castings. Expromet Technologies Group was founded in 2016 to harness capabilities of leading UK metal manufacturing companies. Haworth Castings operates alongside other group companies as part of integrated manufacturing solutions.
• InvestacastcoreStrategic or Co-development PartnerSister company under Expromet Technologies Group specialising in investment casting and pressure die casting with operations in the UK and global sourcing partners.
• Metaltech PrecisioncoreStrategic or Co-development PartnerSister company under Expromet Technologies Group specialising in high-precision CNC machining for complex, critical components.
• NC PrecisioncoreStrategic or Co-development PartnerPart of Expromet Technologies Group manufacturing family offering precision engineering capabilities.
• Global Foundry and Machining PartnersminorChannel Partner/ Reseller/ DistributorTrusted network of global foundry and machining partners located across Europe and Asia, carefully managed and audited through Expromet Technologies Group. Supports high-volume production where cost and lead time are key drivers, offers dual sourcing options and hybrid UK/overseas production models.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Metaltech Precision: Sister company within Expromet Technologies Group providing high-precision CNC machining, fabrication and assembly. Closely linked through the group offering and often delivers the post-casting machining step for cast components, making it operationally comparable as a complementary precision engineering service.
• Tiverton Fabrications: Sister company within Expromet Technologies Group specialising in welded fabrications, vessels and vacuum chambers in aluminium and speciality alloys. Comparable as a sister precision engineering entity under the same group umbrella, often combining with Haworth castings on integrated projects.
• Harrison Castings: UK-based iron and steel foundry producing sand castings for rail, defence, construction and industrial markets. Comparable as a UK sand casting foundry serving heavy industrial and regulated sectors, though focused on ferrous rather than aluminium alloys.
• Aerocast Alloys: UK aluminium foundry focused on gravity and low-pressure die castings for aerospace and defence. Comparable process (gravity die casting), geography (UK) and customer base (performance-critical castings).
• Grainger & Worrall: UK-based aluminium and iron foundry specialising in sand and gravity die castings for automotive, aerospace and motorsport. Direct competitor on process (sand casting), geography (UK) and target customers (performance-critical industries).
• Investacast: Sister company within Expromet Technologies Group offering investment casting and pressure die casting in aluminium and other alloys. Operates in the same UK foundry market with overlapping customer base in aerospace, defence and industrial sectors; the most directly comparable peer due to shared ownership, services and target verticals.
• Dean Group International: UK contract manufacturer offering investment casting, sand casting and CNC machining for aerospace, defence, medical and industrial markets. Directly comparable business model: precision castings + in-house machining + finishing for safety-critical sectors.
• Goodwin Steel Castings: UK-based steel foundry producing sand and investment castings for defence, nuclear, marine and industrial markets. Comparable as a UK precision foundry serving defence and regulated industries, with overlapping certification profile (JOSCAR, ISO 9001).

Regional players

• Hayward Tyler: UK-based specialist in precision cast and machined components for power generation, naval and industrial markets. Comparable UK precision engineering business serving safety-critical industries, though with a distinct product focus on pumps and motors.

Broad incumbents

• Alcoa Howmet Aerospace: Global leader in aluminium and titanium castings for aerospace and defence, with broad capabilities across sand, investment and high-pressure casting. Sets the competitive benchmark on scale, certification and aerospace customer relationships; competes for larger programmes where Haworth may act as second-source.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/embed/T1ymY_0h7As?feature=oembed

Compliance4 records

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 Haworth Castings