Siam Yamato Steel Rayong plant
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Siam Yamato Steel Rayong plant (เหล็กสยามยามาโตะ), also known as Siam Yamato Steel II (SYS II), Siam Yamato Steel Huai Pong plant, is a steel plant in Maptaphut, Rayong, Thailand that operates electric arc furnace (EAF) technology.
Location
The map below shows the exact location of the plant in Maptaphut, Rayong, Thailand:
- Location: 9/9 Soi G-5, Pakorn Songkronraj Road, WHA Eastern Industrial Estate (Maptaphut), Huay Pong Sub-District, Muang District, Rayong 21150, Thailand
- Coordinates (WGS 84): 12.706642, 101.111703 (exact)
Background
Siam Yamato Steel Co., Ltd was established in 1992 to produce hot-rolled structural steel. It is a joint venture between Yamato Kogyo Co., Ltd. Mitsui & Co., Ltd, The Siam Cement Public Company Limited, Sumitomo Corporation (Thailand) Co., Ltd., and Mitsui & Co. (Thailand) Co., Ltd.[1] The company owns and operates two steel plants (Siam Yamato Steel I and Siam Yamato Steel II) in the Muang District of Rayong, Thailand.[2] In 2024, the company announced a partnership with the SMS group's Brazilian subsidiary, Vetta, aiming at implementing an AI technology to optimize energy consumption, improve operational efficiency and reduce environmental impact[3].
Ownership Tree
This ownership tree is part of the Global Energy Ownership Tracker, a project of Global Energy Monitor.
Plant Details
Table 1: General Plant Details
| Start date | Power source |
|---|---|
| 2010[4][5] | solar panels[6] |
Table 2: Ownership and Parent Company Information
| State-owned entity status | Parent company | Parent company PermID | Parent GEM entity ID | Owner | Owner company PermID | Owner GEM entity ID |
|---|---|---|---|---|---|---|
| Partial | Yamato Kogyo Co Ltd [64.2%]; Mitsui & Co Ltd [20.0%]; Siam Cement PCL [10.0%]; Sumitomo Corp [5.8%] | 4295878941 [64.2%]; 4295880574 [20.0%]; 4295892800 [10.0%]; 5000000997 [5.8%] | E100001010196 [64.2%]; E100000000651 [20.0%]; E100001000930 [10.0%]; E100000000657 [5.8%] | Siam Yamato Steel Co Ltd [100%][7] | 4296781017 | E100000130802 [100%] |
Table 3: Process and Products
| Steel product category | Steel products | Steel sector end users | ISO 14001 | ISO 50001 | Main production equipment |
|---|---|---|---|---|---|
| semi-finished, finished rolled[8] | piling, channel, i-beam, angle, h-beam, beam[9][8] | building and infrastructure[9] | yes[10][11][12][13] | yes[13][11][12][14] | EAF |
Table 4: Plant-level Crude Steel Production Capacities (thousand tonnes per annum)
| Capacity operating status1 | Electric arc furnace steelmaking capacity | Nominal crude steel capacity (total) |
|---|---|---|
| operating | 500[15][7] | 500[15][7] |
Table 5: Actual Plant-level Crude Steel Production by Year (thousand tonnes per annum)
| Year | EAF production | Other/unknown steel production |
|---|---|---|
| 2019 | unknown | unknown |
| 2020 | unknown | unknown |
| 2021 | unknown | unknown |
| 2022 | unknown | unknown |
| 2023 | unknown | unknown |
Unit Details
Table 6: Electric Arc Furnace Details
| Unit name | Status | Start date | Current capacity (ttpa) |
|---|---|---|---|
| unknown EAF (1) | operating[16] | 2010[15] | 500[15][7] |
Table 7: Electric Arc Furnace Feedstock Details
| Unit name | Scrap-based | % scrap |
|---|---|---|
| unknown EAF (1) | yes[8][11] | 100.00[11][17][18] |
Articles and Resources
Additional data
To access additional data, including an interactive map of steel plants, a downloadable dataset, and summary data, please visit the Global Iron and Steel Tracker on the Global Energy Monitor website.
References
- ↑ "SIAM YAMATO STEEL". www.syssteel.com. Retrieved 2023-11-14.
- ↑ Contact Information, SYS Steel, Retrieved on: Sep. 8, 2020
- ↑ "Siam Yamato Steel uses AI model-based energy management solution from SMS group - SMS group GmbH". www.sms-group.com. Retrieved 2025-12-02.
- ↑ (PDF) https://www.seaisi.org/storage/event_agendas/FKKuSU2sGk6rr9jPvC7bsTH9DZgYriCwimUuhqV2.pdf?utm_source=chatgpt.com.
{{cite web}}: Missing or empty|title=(help) - ↑ https://web.archive.org/web/20220716002015/https://www.japanmetaldaily.com/articles/-/108549. Archived from the original on 2022-07-16.
{{cite web}}: Missing or empty|title=(help) - ↑ https://www.syssteel.com/zh-hans/iso_and_environment/.
{{cite web}}: Missing or empty|title=(help) - ↑ 7.0 7.1 7.2 7.3 https://web.archive.org/web/20240125060057/https://www.syssteel.com/en/background/. Archived from the original on 2024-01-25.
{{cite web}}: Missing or empty|title=(help) - ↑ 8.0 8.1 8.2 https://web.archive.org/web/20210302040856/https://www.syssteel.com/en/manufacturing_process/. Archived from the original on 2021-03-02.
{{cite web}}: Missing or empty|title=(help) - ↑ 9.0 9.1 https://web.archive.org/web/20220120124037/https://www.syssteel.com/en/product/. Archived from the original on 2022-01-20.
{{cite web}}: Missing or empty|title=(help) - ↑ (PDF) https://web.archive.org/web/20240115065417/https://www.syssteel.com/wp-content/uploads/2021/02/TIS-14001-2559-ISO-14001-2015.pdf. Archived from the original (PDF) on 2024-01-15.
{{cite web}}: Missing or empty|title=(help) - ↑ 11.0 11.1 11.2 11.3 https://www.syssteel.com/en/iso_and_environment/.
{{cite web}}: Missing or empty|title=(help) - ↑ 12.0 12.1 https://web.archive.org/web/20220319023839/https://www.syssteel.com/en/certificate/. Archived from the original on 2022-03-19.
{{cite web}}: Missing or empty|title=(help) - ↑ 13.0 13.1 https://www.syssteel.com/zh-hans/certificate/.
{{cite web}}: Missing or empty|title=(help) - ↑ (PDF) https://www.syssteel.com/wp-content/uploads/2022/07/ISO-50001_2018.pdf.
{{cite web}}: Missing or empty|title=(help) - ↑ 15.0 15.1 15.2 15.3 https://share.google/rnGKmktlNFkcxOxG9.
{{cite web}}: Missing or empty|title=(help) - ↑ https://web.archive.org/web/20240916184605/https://www.syssteel.com/en/manufacturing-process/. Archived from the original on 2024-09-16.
{{cite web}}: Missing or empty|title=(help) - ↑ https://www.sms-group.com/en-ae/press-and-media/press-releases/press-release-detail/siam-yamato-steel-uses-ai-model-based-energy-management-solution-from-sms-group.
{{cite web}}: Missing or empty|title=(help) - ↑ (PDF) https://library.e.abb.com/public/591691c2bb33a42d48257a2800508f64/AIST%20Magazine%20Article.pdf.
{{cite web}}: Missing or empty|title=(help)
