ASTM A278 PDF

ASTM A Standard Specification for Gray Iron Castings for Pressure- Containing Parts for Temperatures up to Degrees F. Find the most up-to-date version of ASTM A at Engineering Purchase your copy of ASTM A/AM – 01() as a PDF download or hard copy directly from the official BSI Shop. All BSI British.

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The high-strength grades can be quenched and tempered by austempering. The acceptance of the castings is based on characteristics that a metalcasting facility or independent third party can evaluate and control during production.

The name, Gray Iron, is derived from the characteristic gray color of the casting when fractured. We also ask that you refer to MatWeb’s terms of use regarding atsm information.

Iron Specifications – Jade Trading Casting Services | Jade Trading

The damping capacity of gray iron is about times higher than steel. Grey iron — Flake graphite provides gray iron with unique properties such as excellent machinability at hardness levels that produce superior wear-resistant characteristics, the ability to resist galling and excellent vibration damping. Ductile Iron Link Pin. It also has good galling and wear resistance because the graphite flakes self lubricate. In heavy sections, its strength is reduced significantly. Alloy additions may be needed to obtain the higher-strength grades in heavy sections.

Click here to view all the property values for this datasheet as they were w278 entered into MatWeb. Grey Iron Compressor Head. Gray iron is a common engineering alloy because of its relatively low cost and good machinabilityadtm results from the graphite lubricating the cut and breaking up the chips.

However, the 2a78 microstructure for the indicated hardness also is a requirement. We satm your input. Grey Iron Compressor Body. Alloy additions may be made to assist in controlling the matrix structure as-cast or to provide response to heat treatment.

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Ductile Iron is commonly known as Nodular Iron. Please read our License Agreement regarding materials data and our Privacy Policy. Lower Classes of Gray Iron provide better machinability with higher classes atm strength and wear resistance. Tension test shall be performed on each lot and materials shall conform to the tensile requirements specified.

ASTM A278/A278M – 01(2015)

This specification covers gray iron for castings suitable for pressure-containing parts at elevated temperatures. Gray iron above class 40 requires alloying to provide solid solution strengtheningand heat treating is used to modify the matrix.

For over 60 years, Carson Castings continues to meet your raw and asgm sand and investment casting needs with ISO certified facilities. In some applications, the finished component aetm tested in the manner in which it will be used.

A may be alloyed with Chrome and Copper. Excessive vibration causes inaccuracies in precision machinery and excessive wear on gear teeth and bearings. To efficiently machine cast irons, the appropriate tool material of the correct grade and shape must be selected. Gray iron also experiences less solidification shrinkage than other cast irons that do not form a asstm microstructure.

ADI Properties Austempering of ductile iron castings at higher temperatures axtm ADI with lower strength and hardness, as well as higher ductility and toughness.

Casting Processes The properties of all cast metals are influenced by the manner in which they solidify and cool. Castings to be used at a particular temperature range shall undergo heat treatment and cooling. Types of Specifications When mechanical properties are important, the most common procedure to qualify gray or ductile iron castings is to use a standard test bar poured separately with the specified lot of general engineered castings.

This abstract is a brief summary of the referenced standard. Free Trade Publications, Click Here!

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Strength and hardness are sensitive to section thickness in gray iron castings. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The different grades of ductile iron castings are produced by controlling the matrix structure around the graphite either asfm cast or by heat treatment. Malleable iron is ideal for thin-sectioned components that require ductility.

Austempering of ductile iron castings at atsm temperatures produces ADI with lower strength and hardness, as well as higher ductility and toughness. Machining Cast Iron To efficiently machine cast irons, the appropriate tool material of the correct grade and shape must be selected. The actual properties of the metal in the casting will depend upon its characteristics and axtm cooling rate of the metal in its various sections.

Another factor affecting graphitization is the solidification rate; the slower the rate, the greater the time for the carbon to diffuse and accumulate into graphite. MatWeb is intended for personal, non-commercial use.

Alloys | Clinch River Casting

Login to see your most recently viewed materials here. Grey iron also has very good damping capacity and hence it astk often used as the base for machine tool mountings.

The iron is cast as a white iron of a suitable chemical composition to respond to the malleabilizing heat treatment. Property Data This page displays only the text of a material data sheet.

Converted from Brinell hardness. Gray ironor grey cast ironis a type of cast iron that has a graphitic microstructure. From Wikipedia, the free encyclopedia. The tips of the flakes act as preexisting notches at which stresses concentrate and it therefore behaves in a brittle manner.