AZA Colina steel plant

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AZA Colina steel plant (Planta siderúrgica AZA Colina (Spanish)), also known as Gerdau Colina, is an electric arc furnace (EAF) steel plant operating in Colina, Región Metropolitana, Chile.


The map below shows the exact location of the plant in Colina, Región Metropolitana, Chile:

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  • Location: Carretera Panamericana Norte 18.968, Colina, Región Metropolitana, Chile
  • Coordinates (WGS 84): -33.294729, -70.727881 (exact)


The AZA Colina steel plant is a project of AZA Acero Sostenible, a Chilean company originally founded as Metalúrgicas AZA in 1953.[1] AZA began producing steel from scrap at its original plant in Renca, Chile in the 1960s.[1]

In 1992, AZA was acquired by Brazilian steelmaker Gerdau, and in 1999 the company inaugurated its Colina steel plant, with an initial production capacity of 360,000 tpa (tonnes per annum).[1]

In June 2018, Gerdau sold its entire stake in AZA to a consortium formed by four Chilean investors: Ingeniería e Inversiones Limitada, Inversiones Reyosan SpA, Los Andes S.A. de Inversiones, and Matco Cables SpA.[2][3]

The AZA plant currently has an annual production capacity of 520,000 tonnes of crude steel.[4] Billets produced in Colina are transformed into long steel products including bars, wire rod and profiles at Colina's rolling mill and at AZA's original plant in Renca.[4][5] The Colina and Renca rolling mills have steel processing capacities of 370,000 and 100,000 tpa, respectively.[4]

AZA promotes itself as a "green steel" producer, based on its commitment to the SBT (Science Based Targets) initiative for lowering greenhouse gas emissions, the company's recent successes in reducing CO2 emissions to less than 0.5 tonnes for every tonne of steel produced, and the certification of its energy management system under the ISO 50001 standard.[4]

Plant Details

Table 1: General Plant Details

Plant status Start date Workforce size
Operating[6] 1999[6] 589[7]

Table 2: Ownership and Parent Company Information

Parent company Parent company PermID Parent company GEM ID Owner Owner company GEM ID
Ingenieria e Inversiones Ltda [45.0%]; Matco Cables [45.0%]; inversiones Reyosan [5.0%]; Los Andes S.A. de Inversiones [5.0%] 5071072856 [45%]; unknown [45%]; unknown [5%]; unknown [5%] E100000131059 [45%]; E100000131163 [45%]; E100000131169 [5%]; E100000131168 [5%] AZA Acero Sostenible[8] E100000131104

Table 3: Process and Products

Steel product category Steel products Steel sector end users ISO 14001 ISO 50001 Main production equipment Detailed production equipment
finished rolled[9] bars, wire rod, profiles[9] building and infrastructure[9] yes[10][7] 1905-07-13 00:00:00[11] EAF[7] 1 Tenova EAF (1996)[12]

Table 4: Crude Steel Production Capacities (thousand tonnes per annum)

*Please see our Frequently Asked Questions page for an explanation of the different capacity operating statuses.
Capacity operating status* Electric arc furnace steelmaking capacity Nominal crude steel capacity (total)
operating 520 TTPA[8][7] 520 TTPA[8][7]

Table 5: Actual Crude Steel Production by Year (thousand tonnes per annum)

Year EAF Production Total (all routes)
2020 381 TTPA[13] 381 TTPA[13]
2021 493 TTPA[14][15] 493 TTPA[16][14]
2022 450 TTPA[7][17] 450 TTPA

Articles and Resources

Additional data

To access additional data, including an interactive map of steel power plants, a downloadable dataset, and summary data, please visit the Global Steel Plant Tracker on the Global Energy Monitor website.


  1. 1.0 1.1 1.2 "Quienes Somos". AZA. Retrieved 2022-01-29.{{cite web}}: CS1 maint: url-status (link)
  2. "Gerdau S.A. 2018 Annual/Transition Report 20-F". US Securities & Exchange Commission. December 31, 2018.{{cite web}}: CS1 maint: url-status (link)
  3. "Gerdau sells Chilean steel operations to Matco, Ingenieria e Inversiones". S&P Global. October 4, 2017.
  4. 4.0 4.1 4.2 4.3 "Reporte de Sustenibilidad 2020 (p 17, p 58, pp 96-98)" (PDF). AZA Acero Sostenible. 2020.{{cite web}}: CS1 maint: url-status (link)
  5. "Productos". AZA. Retrieved 2022-01-28.{{cite web}}: CS1 maint: url-status (link)
  6. 6.0 6.1 Archived from the original on 18 March 2022. {{cite web}}: Missing or empty |title= (help)
  7. 7.0 7.1 7.2 7.3 7.4 7.5 (PDF) Archived from the original (PDF) on 19 January 2024. {{cite web}}: Missing or empty |title= (help)
  8. 8.0 8.1 8.2 Archived from the original on 19 December 2022. {{cite web}}: Missing or empty |title= (help)
  9. 9.0 9.1 9.2 Archived from the original on 03 March 2022. {{cite web}}: Check date values in: |archive-date= (help); Missing or empty |title= (help)
  10. Archived from the original on 18 March 2022. {{cite web}}: Missing or empty |title= (help)
  11. (PDF) Archived from the original (PDF) on 19 March 2022. {{cite web}}: Missing or empty |title= (help)
  12. AIST Electric Arc Furnace Roundup AIST Electric Arc Furnace Roundup. {{cite web}}: Check |url= value (help); Missing or empty |title= (help)
  13. 13.0 13.1 (PDF) Archived from the original (PDF) on 18 March 2022. {{cite web}}: Missing or empty |title= (help)
  14. 14.0 14.1 (PDF) Archived from the original (PDF) on 09 May 2022. {{cite web}}: Check date values in: |archive-date= (help); Missing or empty |title= (help)
  15. (PDF) Archived from the original (PDF) on 17 January 2022. {{cite web}}: Missing or empty |title= (help)
  16. {{cite web}}: Missing or empty |title= (help)
  17. (PDF) Archived from the original (PDF) on 07 March 2023. {{cite web}}: Check date values in: |archive-date= (help); Missing or empty |title= (help)