Gray-iron castings

With some important exceptions, gray-iron castings generally have corrosion resistance similar to that of carbon steel. They do resist atmospheric corrosion as well as attack by natural or neutral waters and neutral soils. However, dilute acids and acid-salt solutions will attack this material. 

Table 3.2. Typical Data Showing llie Effect of Strengtii on Gray Iron Castings (11...

Code of Practice for the Repair and Reclamation of Gray Iron Castings by Welding and Allied Methods, Proc. Inst. Brit. Foundrymen, 43 A1 14-122 (1950). 

Grau-gultigerz, n. tetrahedrite. -guss, m. gray cast iron, gray iron gray-iron casting, -kalk,... 

ASTM A278 Gray iron castings for pressure containing parts 185 1691 AD W3/1 TRD 108 1452 G5501... 

ASTM A436 Austenitic gray iron castings 1694 3468 NFA 32301 G5510... 

ASTM A 48, Standard specification for gray iron castings. 

ASTM A 278, Standard specification for gray iron castings for pressure-containing parts for temperatures up to 650 °F. 

Reduction with iron and water, with the addition of small amounts of acid (hydrochloric, sulfuric, or acetic acid, and occasionally mixtures of these). This neutral reduction method of Bechamp-Brimmeyr can be carried out oiJy with certain kinds of iron, notably gray-iron casting, which must always be tested pre. viously to establish its usabiL ty. In general, other kinds of iron are twt usable (many examples have been given). 

This is an example of the use of sand cores made with the binder solution of Example 1, to make gray iron castings. 

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