標(biāo)準(zhǔn)編號(hào):	GB/T 9440-1988
中文名稱(chēng):	可鍛鑄鐵件
英文名稱(chēng):	Malleable iron castings
中標(biāo)分類(lèi):	J31    鑄造
行業(yè)分類(lèi):	GB    國(guó)家標(biāo)準(zhǔn)
ICS分類(lèi):	77.140.80 77.140.80    鋼鐵鑄件 77.140.80
發(fā)布機(jī)構(gòu):	國(guó)家標(biāo)準(zhǔn)局
發(fā)布日期:	1988-6-25
實(shí)施日期:	1989-3-1
標(biāo)準(zhǔn)狀態(tài):	superseded
被新標(biāo)準(zhǔn)替代:	GB/T 9440-2010 可鍛鑄鐵件
被替代日期:	2011-6-1
替代舊標(biāo)準(zhǔn):	GB 978-1967 GB 5679-1985 可鍛鑄鐵
翻譯語(yǔ)言:	英文
文件格式:	PDF
中文字符數(shù):	6000 字
翻譯價(jià)格(元):	200.0
交付時(shí)間:	付款后 1 個(gè)工作日

This standard is based on ISO 5922-81 "Malleable Cast Iron". 1 Subject and the Aspects Covered This standard specifies the material, acceptance of delivery and technical specification of malleable iron castings. This standard is applicable to mold casting malleable iron castings with sand mold or heat conductivity and may be used as reference for malleable iron castings with other mold. 2 Normative References GB 5612 Code for Representing Cast Iron GB 6060.1 Roughness Comparison Specimens Cast Surfaces GB 6414 Dimensional Tolerances for Castings GB 228 Method for Tensile Test of Metal GB 231 Metallic Materials - Brinell Hardness Test GB 223.1~223.5 and GB 223.12 Methods for Chemical Analysis of Iron, Steel and Alloy JB 2122 Ferritic Malleable: Metallurgical Phase Standard GB 2828 Sampling Procedures and Tables for Lot-by-lot Inspection by Attributes 3 Terms 3.1 Malleable iron castings The malleable iron casting is high tenacity castings acquired by changing the metallographic structure or composition of white cast iron blank by graphitization or oxidation decarburization heat treatment. 3.2 Sample It refers to the casting provided to purchaser for inspection before the castings being formally put into production. 3.3 First piece The first batch of castings during formal production. 4 Classification and Grade of Malleable Cast Iron 4.1 Classification The malleable cast iron is divided into two types according to chemical composition, heat treatment process and different characteristic and metallographic structure. 4.1.1 Black heart malleable cast iron and pearlite malleable cast iron Metallographic structure of black heart malleable cast iron: mainly of ferritic matrix +group flocculent graphite.

1 Subject and the Aspects Covered 2 Normative References 3 Terms 4 Classification and Grade of Malleable Cast Iron 5 Technical Requirements 6 Test Methods 7 Inspection Rules 8 Marks and Certificates 9 Surface Protection, Package, Transport and Storage 10 Acceptance and Rejection Appendix A Malleable Iron Castings Model (Additional) Appendix B Order Requirements of Malleable Iron Castings (Informative) Additional Explanation: