Ductile iron castings

"Standard Specification for Ferritic Ductile Iron Pressure-Retaining Castings for Use at Elevated Temperatures" covers ductile iron castings for pressure-retaining parts for use at elevated temperatures. Castings of all grades are suitable for use up to 450°F. For temperatures above 450°F and up to 650°F, only Grade 60–40–18 castings are suitable

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This specification covers austenitic ductile iron castings, which are used primarily for their resistance to heat, corrosion, and wear, and for other special purposes.

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This specification covers ductile iron castings for use in pressure containing paper mill dryer rolls at temperatures up to 450°F [230°C]. No precise quantitative relationship can be stated between the properties of the iron in various locations of the same casting or between the properties of a casting and those of a test specimen cast from the same iron (see Appendix X1).

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"Standard Test Methods for Impact Testing of Cast Irons" cover the details of apparatus, test specimens and procedures for cast iron, including gray iron, white iron, malleable iron, ductile iron, and austempered ductile iron, but not including chilled rolls or rolls with white iron skins.

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"Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings" covers the classification of graphite in cast irons in terms of type, distribution, and size by visual comparison to reference photomicrographs. This test method is intended to be applicable for all iron-carbon alloys containing graphite particles, and may be applied to gray irons, malleable irons, compacted graphite irons, and the ductile (nodular) irons.

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This specification covers castings made of ductile iron, also known as spheroidal or nodular iron, that is described as cast iron with the graphite substantially spheroidal in shape and essentially free of other forms of graphite, as defined in Terminology A644.

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This specification covers austenitic ductile iron, Type D-2M, Classes 1 and 2, for compressors, expanders, pumps, valves, and other pressure-containing parts intended primarily for low-temperature service.

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This standard is issued under the fixed designation A644; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon indicates an editorial change since the last revision or reapproval.

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This specification covers 14 to 64-in. ductile-iron culvert pipe centrifugally cast; The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

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This specification covers 4 to 64-in. ductile iron gravity sewer pipe centrifugally cast with push-on joints. This specification may be used for pipe with other types of joints, as may be agreed upon at the time of purchase.

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Rotavator is an efficient tillage implement used for rapid bed preparation and is an energy and time efficient equipment for different soils compared to all other conventional tillage implements. The primary cause that limits the persistence of rotavator is wear of its blades. This paper was undertaken to study the material composition and wear characteristics of austempered ductile iron third edition rotavator blades which were developed by austempering heat process done over cast iron.

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This paper was undertaken to study the material composition and wear characteristics of austempered ductile iron third edition (ADI 3rd edition) rotavator blades which were developed by austempering heat process done over cast iron. The objective was carried out by means of elemental analysis and identification of wear pattern of rotavator blades with increase in operational time. The results indicated that the change in material composition responsible for wear characteristics of blades.

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Ductile cast iron socket fittings with TYTON®-sockets ( flangeless ) for use in potable water pipelines are designed for working pressures as given in EN 545 Annex A.3 and EN 545 Table A.1 for wallthickness class K9. Ductile cast iron fittings with screw-gland or bolted-gland sockets for use in potable water pipelines are designed for working pressures up to 16 bar. Higher pressures on request. Ductile cast iron fittings with one flange or more, for the use in potable water pipelines are designed for working pressures as given in EN 545 Annex A.3 and EN 545 Table A.2.

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Gray iron is the most versatile of all foundry metals. The high carbon content is responsible for ease of melting and casting in the foundry and for ease of machining in subsequent manufacturing. The low degree or absence of shrinkage and high fluidity provide maximum freedom of design for the engineer. By suitable adjustment in composition and selection of casting method, tensile strength can be varied from less than 20,000 psi to over 60,000 psi and hardness from 100 to 300 BHN in the ascast condition. By subsequent heat treatment, the hardness can be increased to H Rc 60....

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