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Basis of preparation and presentation of the financial statements (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of basis of preparation and presentation of the financial statements [Abstract] |
Schedule of Subsidiaries | As of December 31, 2018, and 2017, the subsidiaries of Grupo Simec, S.A.B. de C.V. included in the consolidation are the following:
| Percentage of equity owned
Subsidiaries established in Mexico: | 2 0 1 8 |  | 2 0 1 7
Compañia Siderurgica de Guadalajara, S.A. de C.V. | 99.99% |  | 99.99%
Arrendadora Simec, S.A. de C.V. | 100.00% |  | 100.00%
Simec International, S.A. de C.V. | 100.00% |  | 100.00%
Compañia Siderurgica del Pacifico, S.A. de C.V. | 99.99% |  | 99.99%
Coordinadora de Servicios Siderurgicos de Calidad, S.A. de C.V. (8) | 100.00% |  | 100.00%
Industrias del Acero y del Alambre, S.A. de C.V. | 99.99% |  | 99.99%
Procesadora Mexicali, S.A. de C.V. | 99.99% |  | 99.99%
Servicios Simec, S.A. de C.V. | 100.00% |  | 100.00%
Sistemas de Transporte de Baja California, S.A. de C.V. | 100.00% |  | 100.00%
Operadora de Servicios Siderurgicos de Tlaxcala, S.A. de C.V. | 100.00% |  | 100.00%
Operadora de Metales, S.A. de C.V. | 100.00% |  | 100.00%
Administradora de Servicios Siderurgicos de Tlaxcala, S.A. de C.V. | 100.00% |  | 100.00%
CSG Comercial, S.A. de C.V. | 99.95% |  | 99.95%
Operadora de Servicios de la Industria Siderurgica ICH, S.A. de C.V. | 100.00% |  | 100.00%
Corporacion Aceros DM, S.A. de C.V. and subsidiaries (1) | 100.00% |  | 100.00%
Acero Transportes San, S.A. de C.V. (1) | 100.00% |  | 100.00%
Simec Acero, S.A. de C.V. (8) | 100.00% |  | 100.00%
Corporacion ASL, S. A. de C.V. | 99.99% |  | 99.99%
Simec International 6, S.A. de C.V. (8) | 100.00% |  | 100.00%
Simec International 7, S.A. de C.V. | 99.99% |  | 99.99%
Simec International 9, S.A.P.I. de C.V. | 100.00% |  | 100.00%
Corporativos G&DL, S.A. de C.V. (8) | 100.00% |  | 100.00%
Orge, S.A. de C.V. | 99.99% |  | 99.99%
Siderurgica del Occidente y Pacifico, S.A. de C.V. | 100.00% |  | 100.00%
RRLC, S.A.P.I. de C.V. | 95.10% |  | 95.10%
Grupo Chant, S.A.P.I. de C.V. | 97.61% |  | 97.61%
Aceros Especiales Simec Tlaxcala, S.A. de C.V. | 100.00% |  | 100.00%
Recursos Humanos de la Industria Siderurgica de Tlaxcala, S.A. de C.V. | 100.00% |  | 100.00%
GSIM de Occidente S.A. de C.V. (9) | 100.00% |  | 100.00%
Fundiciones de Acero Estructural, S.A. de C.V. | 100.00% |  | 100.00%
Siderúrgicos Noroeste, S.A. de C.V. (10) | 100.00% |  | 100.00%
Subsidiaries established in foreign countries: |  |  |
SimRep Corporation and Subsidiaries (3) (4) (5) (8) | 50.22% |  | 50.22%
Pacific Steel, Inc. (4) | 100.00% |  | 100.00%
Pacific Steel Projects, Inc. (4) | 100.00% |  | 100.00%
Simec Steel, Inc. (4) | 100.00% |  | 100.00%
Simec USA, Corp. (4) | 100.00% |  | 100.00%
Undershaft Investments, NV. (6) | 100.00% |  | 100.00%
GV do Brasil Industria e Comercio de Aço LTDA (7) | 100.00% |  | 100.00%
Companhia Siderurgica do Espiritu Santo S.A. (11) | 100.00% |  |
GS Steel B.V. (2) | 100.00% |  | 100.00%
| (1) | Companies located in San Luis Potosi. For purposes of this report constitute the “Grupo San”.
| (2) | Company established in Netherlands.
| (3) | ICH owns 49.78% of the shares in this company.
| (4) | Companies established in the United States of America, except a subsidiary of SimRep which is established in Canada.
| (5) | SimRep as an individual company has no significant operations or assets, except for its investment in Republic Steel. For purposes of this report, these companies are named “Republic”.
| (6) | Company established in Curaçao.
| (7) | Company established in Brazil.
| (8) | Companies that have lost the entire capital stock, except Corporativos G&DL, S.A. de C.V., and Administradora de Servicios Siderúrgicos de Tlaxcala, S.A. de C.V. which only have lost 2/3 of their capital stock.
| (9) | Company incorporated in 2016.
| (10) | Company incorporated in 2017.
| (11) | Company incorporated in 2018.
Schedule of Relevant Exchange Rates Used | Relevant exchange rates used in the preparation of the consolidated financial statements of foreign subsidiaries were as follows (Mexican pesos per one U.S. dollar):
| Current exchange rate as of December 31, 2018 | 19.66 |  |
| Current exchange rate as of December 31, 2017 | 19.74 |  |
| Average exchange rate for the year ended December 31, 2018 (*) | 19.23 |  |
| Average exchange rate for the year ended December 31, 2017 (*) | 18.94 |  |
| Current exchange rate as of April, 9 of 2019 | 18.97 |  |
| (*) | Average exchange rate used to translate revenues, costs and expenses of the companies mentioned above.
Schedule of Estimated Useful Lives of Assets |
The initial estimated useful lives of the Company’s main assets are as follows:
| Years
Buildings | 10 to 65
Machinery and equipment | 5 to 40
Transportation equipment | 4
Furniture, mixtures and computer equipment | 3 to 10

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