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About Us

Siderúrgica Alterosa S/A was founded in 1959 and is one of the main pig iron producers in the state of Minas Gerais and in Brazil.

Pig iron is an alloy of iron and carbon, obtained in blast furnaces by reacting iron ore with charcoal  and limestone. It is used as a raw material to obtain other iron and steel alloys, which in turn are used to manufacture products that are present in people's daily lives in the most diverse forms, such as vehicles, machines, tools and structural elements such as bridges and buildings, as well as countless other applications.

The company's two industrial units are located in the municipality of Pará de Minas, in the center-west of the state, strategically in the region of Brazil's second largest iron ore reserve. The main industrial unit has a thermoelectric plant that generates 50,000 MW/year, providing the company with energy self-sufficiency, as well as significant benefits for the local community and the environment.

The production capacity is of 188,000 metric tons of pig iron per year, classified as nodular pig iron, foundry pig iron, and basic pig iron. These products are sold in the Brazilian domestic market as well as in international markets, serving customers all over the world.

The development of Siderúrgica Alterosa led to the creation of other affiliated companies, currently organized under Grupo Alterosa. These companies operate in the reforestation, grain production, and beef cattle sectors.

Siderúrgica Alterosa generates more than 400 direct jobs and 1,500 indirect jobs.

Grupo Alterosa offers infographics that present all of our processes with complete transparency.


Alterosa Foundry

In the mid-1970s, driven by the pursuit of diversification and added value, Alterosa Foundry was established. It currently produces rough castings in gray, nodular, and vermicular cast iron, serving the machinery, metallurgical, and sanitation industries.

The Alterosa Foundry unit is located in the municipality of Pará de Minas, in the central-west region of the state, within the same industrial complex as Siderúrgica Alterosa.

Our current production capacity is 250 tons per month, with parts weighing up to 2.5 tons. The foundry is equipped with a 600 kW induction furnace with two 2-ton crucibles, a Pep-set sand mixer capable of producing 6 tons of sand per hour, a shot blasting system, and high-frequency equipment for part finishing (deburring), ensuring quality and productivity.

Regarding the metallurgical quality of our castings, the foundry performs chemical analysis using an optical spectrometer, as well as metallographic analysis, hardness testing, and mechanical testing conducted by an INMETRO-certified body.


Power Cogeneration

The Alterosa Group entered the energy sector in June 2009 with the inauguration of the Cogeral Thermoelectric Plant, developed in partnership with Cemig – Companhia Energética do Estado de Minas Gerais. Located in the city of Pará de Minas — where the main production unit of Siderúrgica Alterosa, the Group’s pioneering company, is also based — the thermoelectric plant has a generating capacity of 6,000 kW.

Approved by the National Electric Energy Agency (ANEEL), the plant harnesses the gas generated during pig iron production — at an average flow rate of 24,000 Nm³ per hour — to generate electricity through a turbogenerator operating on the Rankine cycle.

Currently, part of this gas is consumed during the pig iron production process itself. The residual gas is then used for energy generation through combustion in a boiler, producing steam at 43 bar, superheated to 430 °C.

The system ensures the energy self-sufficiency of the Group’s companies, while also delivering significant benefits to the environment and the surrounding community.


IMS – Integrated Management System

The Integrated Management System encompasses quality, environmental, health, occupational safety, and personal data protection processes, in accordance with the characteristics, activities, and needs of Siderúrgica Alterosa and Alterosa Foundry. With the growing need to do more with less, many organizations view the integration of management systems as an excellent opportunity to enhance administrative performance and reduce costs.

The ISO 9001, ISO 14001, and ISO 45001 standards guide the management system of Siderúrgica Alterosa and Alterosa Foundry.

ISO 9001 provides a set of requirements that assure customers of Siderúrgica Alterosa and Alterosa Foundry’s capability to consistently deliver products that meet their needs and expectations, in compliance with applicable laws and regulations.

ISO 14001 establishes a set of requirements that provide customers with confidence that Siderúrgica Alterosa and Alterosa Foundry operate under conditions in which environmental impacts are minimized, while managing activities in an appropriate and preventive manner and ensuring compliance with applicable laws and regulations.

ISO 45001 sets forth requirements that provide confidence in Siderúrgica Alterosa and Alterosa Foundry’s capability to manage the occupational health and safety of its employees, while continuously improving its performance and ensuring compliance with applicable laws and regulations

The LGPD – Brazil’s General Data Protection Law – guides the Integrated Management System and establishes mandatory guidelines for the processing of personal data by Siderúrgica Alterosa and Alterosa Foundry, ensuring the right to privacy and the protection of personal data of employees, users, and data subjects through transparent and fully secure practices.



Documentos e Certificações

Acesse e faça o download das diretrizes e certificações oficiais do Sistema de Gestão Integrado da Siderúrgica Alterosa.

Institucional

Institutional — 2024 Commitment Statement

A statement of corporate ethical commitment to employees, customers, suppliers, and society at large.

Download
Qualidade

Quality — ISO 9001:2015 Certification

Quality Management System certified by DNV for the production of pig iron and castings.

Download
Meio Ambiente

Environment — ISO 14001:2015 Certification

Environmental Management certificate focused on minimizing impacts and promoting sustainable development.

Download
Saúde e Segurança

Health and Safety — ISO 45001:2018 Certification

Occupational Health and Safety Management standard, ensuring a safe working environment.

Download


Our History

ISO 9001 certification for Siderúrgica Alterosa’s management system
19
99

ISO 9001 certification for Siderúrgica Alterosa’s management system

ISO 14001, Siderúrgica Alterosa’s first environmental certification
20
19

ISO 14001, Siderúrgica Alterosa’s first environmental certification

Implementation of cultural and sports projects
20
19

Implementation of cultural and sports projects

Commissioning of industrial effluent treatment
generated during the production process
20
19

Commissioning of industrial effluent treatment generated during the production process

ISO 45001 certification for occupational health
and safety, completing the triple certification of Siderúrgica Alterosa’s management system.
20
22

ISO 45001 certification for occupational health and safety, completing the triple certification of Siderúrgica Alterosa’s management system.

ISO 9001 certification for Alterosa Foundry,
thereby integrating it with the previously attained ISO 14001 and ISO
45001 certifications
20
22

ISO 9001 certification for Alterosa Foundry, thereby integrating it with the previously attained ISO 14001 and ISO 45001 certifications

ISO 14064:2018 certification and the Brazilian GHG
Protocol Program through the verification of the greenhouse gas emissions inventory for the year 2022
20
23

ISO 14064:2018 certification and the Brazilian GHG Protocol Program through the verification of the greenhouse gas emissions inventory for the year 2022

ISO 9001 certification for Siderúrgica Alterosa’s management system
19
99

ISO 9001 certification for Siderúrgica Alterosa’s management system

ISO 14001, Siderúrgica Alterosa’s first environmental certification
20
19

ISO 14001, Siderúrgica Alterosa’s first environmental certification

Implementation of cultural and sports projects
20
19

Implementation of cultural and sports projects

Commissioning of industrial effluent treatment
generated during the production process
20
19

Commissioning of industrial effluent treatment generated during the production process

ISO 45001 certification for occupational health
and safety, completing the triple certification of Siderúrgica Alterosa’s management system.
20
22

ISO 45001 certification for occupational health and safety, completing the triple certification of Siderúrgica Alterosa’s management system.

ISO 9001 certification for Alterosa Foundry,
thereby integrating it with the previously attained ISO 14001 and ISO
45001 certifications
20
22

ISO 9001 certification for Alterosa Foundry, thereby integrating it with the previously attained ISO 14001 and ISO 45001 certifications

ISO 14064:2018 certification and the Brazilian GHG
Protocol Program through the verification of the greenhouse gas emissions inventory for the year 2022
20
23

ISO 14064:2018 certification and the Brazilian GHG Protocol Program through the verification of the greenhouse gas emissions inventory for the year 2022

ISO 9001 certification for Siderúrgica Alterosa’s management system
19
99

ISO 9001 certification for Siderúrgica Alterosa’s management system

ISO 14001, Siderúrgica Alterosa’s first environmental certification
20
19

ISO 14001, Siderúrgica Alterosa’s first environmental certification

Implementation of cultural and sports projects
20
19

Implementation of cultural and sports projects

Commissioning of industrial effluent treatment
generated during the production process
20
19

Commissioning of industrial effluent treatment generated during the production process

ISO 45001 certification for occupational health
and safety, completing the triple certification of Siderúrgica Alterosa’s management system.
20
22

ISO 45001 certification for occupational health and safety, completing the triple certification of Siderúrgica Alterosa’s management system.

ISO 9001 certification for Alterosa Foundry,
thereby integrating it with the previously attained ISO 14001 and ISO
45001 certifications
20
22

ISO 9001 certification for Alterosa Foundry, thereby integrating it with the previously attained ISO 14001 and ISO 45001 certifications

ISO 14064:2018 certification and the Brazilian GHG
Protocol Program through the verification of the greenhouse gas emissions inventory for the year 2022
20
23

ISO 14064:2018 certification and the Brazilian GHG Protocol Program through the verification of the greenhouse gas emissions inventory for the year 2022



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