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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Gray iron – Wikipedia

We advise that you only atm the original value or one of its raw conversions in your calculations to minimize rounding error. The iron is cast as a white iron of a suitable chemical composition to respond to the malleabilizing heat treatment. By using this site, you agree to the Terms of Use and Privacy Policy.

Because the modulus of elasticity for gray iron is higher in compression than it is in tension, the use of standard structural formulas results in a conservative design. Malleable iron is ideal for thin-sectioned components that require ductility. The silicon promotes good corrosion resistance and increased fluidity when casting.

Coated carbides, particularly those with aluminum oxide exteriors, are effective in production machining applications. This abstract is a brief summary of the referenced standard. The contents, asym, and technical data from this site may not asstm reproduced either electronically, photographically or substantively without permission from MatWeb, LLC. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units.

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Grey Iron Compressor Body. To see MatWeb’s complete data sheet for this material including material property data, metal compositions, material suppliers, etcplease click the button below. For example, the number in a Class 30 gray iron refers to the minimum tensile strength in ksi. The different metals within this family are separated further into the following classifications:.

Retrieved from ” https: Alloy additions may be needed 2a78 obtain the higher-strength grades in heavy sections. Property Comparisons for Gray Iron Classes. The high-strength grades can be quenched and tempered by austempering.

ASTM A278/A278M – 01(2015)

Grey iron is sometimes spelled gray iron. Only minor compositional differences to promote the desired matrix microstructure exist among the regular grades. We appreciate your input. Castings shall be stress-relieved by placing them in a suitable furnace and heating them uniformly to the temperatures and for the times specified. Or if you don’t have an account with us atsm, then click here to register.

ASTM A – Standard for Gray Iron Castings for Pressure Containing Parts

The damping capacity of gray iron is considerably greater than that of steel and other iron types. Gray iron high carbon equivalent.

The actual properties of the metal in the casting will depend upon its characteristics and the cooling rate of the metal in its various sections. It has a tensile strength comparable to many steel alloys and a modulus of elasticity between that of gray iron and steel. The other gray iron specifications build off of these two 2a78 specifications.

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For example, pressure-containing parts can be hydraulically proof tested. This provides the metal with considerable elasticity, impact resistance and high yield strength.

Please contact us at webmaster matweb. Excessive vibration causes inaccuracies in precision machinery and excessive wear on gear teeth and bearings. 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. To efficiently machine cast irons, the appropriate tool material of the correct grade and shape must be selected.

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. There is an insignificant amount of graphite present in Abrasion Resistant Irons.