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ASTM-A48 & A48M-2003-Standard nkọwapụta nke Gray Iron Castings
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ASTM-A108-2003-Standard nkọwapụta maka Ogwe Ogwe, Carbon na Alloy, Oyi-Emechara
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ASTM-A322-91-EN-Standard nkọwapụta maka Ogwe Nchara, Alloy, Standard Grades
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ASTM-A732 & A732M-2002-
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DIN-EN-10346-Na-aga n'ihu Hot-itinye Coated Steel Flat Products
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GBT-9439-2010-Gray Cast Iron Castings
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GOST-3443-87
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GOST-7293-85_RU-Ductile Nkedo Iron
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GOST-30893.1-2002-RU-General Ndidi
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ISO-2768-1 General Ndidi
