SA 667 - SPECIFICATION FOR CENTRIFUGALLY CAST DUAL...

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SPECIFICATION FOR CENTRIFUGALLY CAST DUAL METAL (GRAY AND WHITE CAST IRON) CYLINDERS SA-667/SA-667M (Identical with ASTM Specification A 667/A 667M-87.) 1. Scope 1.1 This specification covers centrifugally cast cylin- ders with an outer layer of white cast iron and the remainder of the material of gray cast iron. These castings are suitable for pressure containing parts the design strength of which is based on the gray iron portion of the cylinder. These castings are suitable for service at temperatures up to 450°F [230°C]. 1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other. Combining values from the two systems may result in nonconformance with the specification. 2. Referenced Documents 2.1 ASTM Standards: A 278 Specification for Gray Iron Castings for Pressure- Containing Parts for Temperatures Up to 650°F A 278M Specification for Gray Iron Castings for Pres- sure-Containing Parts for Temperatures Up to 345°C [Metric] 3. Materials and Manufacture 3.1 The melting procedures shall be optional with the foundry.
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