92 - Quantities and units. ASTM E380 - Standard for Metric Practice. DOD-STD-1476 - Metric System, Application in New Design. IEEE 268 - IEEE Standard for Metric Practice.

nclusion. This effort is entering its third year. The fourteen remaining items of controversy were resolved and the new document could have been issued in 1995. The process broke down at final balloting with the re-surfacing of the spelling issue of metre/meter and litre/liter.

t estimates indicate that there are in excess of 3000 such “official” guides and practices issued by very diverse technical, professional, industry, organizational, private and public societies. ASTM E380 was originally the American National Standard. A falling out between the American National Standards Institute and the American Society for Testing and Materials in the early 1980’s resulted in replacing ASTM E380 with IEEE 268 as the American National Standard, which is the situation to this day.

nversion is the process of changing inch units to equivalent metric units or vice versa within acceptable measurement tolerances without changing the physical configuration. Metric units, practices, and uses for the documentation shall be in accordance with the International System of Units (SI) in accordance with ASTM E380 and IEEE STD 268.

Shall be in accordance with ASTM FI000, ASTM F856, or ASME Y32.2.6, as applicable.

Inspection of parts should be in accordance with ASTM standards.

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If the project engineer should require other service conditions, they should be specified in accordance with ASTM standards, as noted above.

the use of dual dimensioned drawings for new design. Section K6.8 of this manual will remain in place as reference information for existing dual dimensioned drawings. Dual dimensioning practices are also to be discouraged for commercial applications in new design.

gencies as the American Society for Testing Materials (ASTM) and the National Electrical Manufacturers Association (NEMA).

nsult ANSI, SAE, or ASTM designations or industrial catalogs for this purpose.

mp bezels, logos, and black letters on hoods, etc. Such parts are to be plated in accordance with ASTM B604-75 or the American Society of Electroplated Practices standard 102. Plastics suitable for plating are acrylonitrile, butadiene, styrene, polypropylene, and polysulfone. These materials are manufactured by various companies and may be known as various trademark products. Whichever of these materials is used, it will be specified as well as the plating in the material block of the title block (for example, Styrene -- Plated per ASTM B604-75, Service Condition SC3). The service condition designation is for protection against wett

t will be easily identified by all concerned. If a particular type or grade of material lends itself to the fabrication desired, it should be specified. Always use the material specification numbers of the company originating the drawing or commonly recognized industrial standard designations (such as SAE’s and ASTM’s). An example of this would be SAE 1010, Steel. When specifying special materials, furnish a more complete description to facilitate procurement and incoming inspection. Avoid the use of trade names for the specification of materials. However, if the use of a trade name is necessary, include the name of the ve

lly to improve toughness. - The maximum stress a material subjected to a stretching load can withstand without tearing. Also known as hot strength. - Provides corrosion resistance and a stop-off barrier in the nitriding of high strength steels. It also facilitates soldering and antigalling. Type IType II Reference ASTM B-545 for electro-deposited coatings of tin.Hot-dipped - Has an .0002 - .0008 inch thick satin or bright finish with excellent solderability on copper-based alloys. No undercoating is required on steel substrates. - Any of a variety of steels capable of being hardened sufficiently so as to be a suitable material f

alty. steel tubing; grey cast irons; ductile cast irons; aluminum and its alloys, wrought and cast; magnesium alloys; nickel alloys; aerospace alloys; and electrical steels. Nations and organizations represented in this book include the United States Federal Government, the People’s Republic of China, DOD, ASM, ASTM, API, AISI, CDA, SAE, Euronorm, ISO, and COPANT. Full details are available upon request from Genium Publishing Corporation.