| 2010 for Industrial Standard world-class product qualified certificate from Bureau Veritas (BV), France, 2010 |
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| 2009 for Industrial Standard Det Norske Veritas (DNV), a world certified body of Norway, certified its products quality 2009 |
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| 2009 for Thai Industrial Standard no. TIS 8001-2003 |
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| 2006 for Industrial Standard in 2006 European Standard no EN 10025-2 |
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| 2002 for Thai Industrial Standard no. TIS 1999-2543
for hot rolled carbon flat steel for automotive structural uses
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| 2002 for Thai Industrial Standard no. TIS 2011-2543
for hot rolled carbon flat steel for corrosion resistant steel
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| 2002 for Thai Industrial Standard no. TIS 2060-2543
for hot rolled carbon flat steel for gas cylinders
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| 2001 for Thai Industrial Standard no. TIS 1479-2541
for hot rolled carbon flat steel for general structure
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2001 for Thai Industrial Standard no. TIS 1735-2542
for hot rolled carbon flat steel for pipe and tube products
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| 2001 for Thai Industrial Standard no. TIS 1499-2541
for hot rolled carbon flat steel for weld structure
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| 2001 for Thai Industrial Standard no. TIS 1501-2541
for hot rolled carbon flat steel for machine structures and special applications
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| 2001 for Thai Industrial Standard no. TIS 1884-2542
for hot rolled carbon flat steel with press draw ability to be used for automobile
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| 2000 for Japanese Industrial Standard for hot rolled steel product (JIS MARK)
JIS G3101
JIS G3106
JIS G3131
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| 1999 for Thai Industrial Standard no. TIS 528-2540
for hot rolled carbon steel flat product for general and structural uses
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