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ASME NM 3.2-2020 pdf download

ASME NM 3.2 -2020 pdf download.Nonmetallic Materials Part 2 — Reinforced Thermoset Plastic Material Specifications.
1. Scope 1.1 This specification covers the requirements for continu- ous fiber and staple fiber glass strands, including single, plied and multiple wound. It also covers textured glass fiber yarns. This specification is intended to assist ultimate users by designating the general nomenclature for the strand products that age generally manufactured in the glass fiber industry. 1.2 Glass fibers are produced having various compositions. General applications are identified by means of a letter designation. The letter designation represents a family of glasses that have provided acceptable performance to the end-user in the intended application. For example, the compo- sition limits stated for E-Glass in this specification representing the glass fiber family for general and most electrical applica- tions is designated by the letter E. Military specifications, such as, MIL-R-60346, recognize the composition limits described in this specification as meeting the respective requirements for E-Glass strands used in reinforced plastic structure applica- tions. 1.3 Glass fiber strands have a variety of general uses under specific conditions, such as high physical or chemical stress, high moisture, high temperature, or electrical environments. Property requirements under specific conditions are agreed upon between the purchaser and the supplier. Electrical prop- erty requirements vary with specific end-use applications. For printed circuit board applications, other requirements may be needed such as the use of IPC Specification EG 4412 A for finished fabric woven from E-Glass for printed circuit boards, or Specification MIL-P-13949 for printed wiring boards applicable to glass fabric base.
1.5 This specification is one of a series to provide a substitute for Military Specifications: MIL-Y-1140 Yarn, Cord, Sleeving, Cloth and Tape-Glass; and MIL-C-9084 Cloth, Glass Finished for Resin Laminates. 1.6 Additional ASTM specifications in this series have been drafted and appear in current editions of the Annual Book of ASTM Standards. These include finished glass fabrics, unfin- ished glass fabrics, glass tapes, glass sleevings, glass cords, glass sewing threads, and finished laminates made from fin- ished glass fabrics. 1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards: D123 Terminology Relating to Textiles D1423/D1423M Test Method for Twist in Yarns by Direct- Counting D1907/D1907M Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method D2256/D2256M Test Method for Tensile Properties ofYarns by the Single-Strand Method D2258/D2258M Practice for Sampling Yarn for Testing D2904 Practice for Interlaboratory Testing of a Textile Test4.2.3 Electrical applications include a wide variety of uses. The composition in 4.2.1 is identical to IPC EG 4412 A for printed circuit boards and to MIL-G-55636B. Additionally, such fiber glass products often are specified for aerospace applications. Products covered by the composition range in 4.2.2 are used in general applications, such as power company equipment, high voltage devices, residential electric boxes, third rail covers, high voltage standoff rods, electrical pultru- sion products, light poles, electrical tool covers, and electrical tape. Other applications include roofing, flooring, filtration, panel rovings, gun rovings, smc rovings, chopped strand reinforcements, paper yarns, and industrial yarns. 4.2.4 The nomenclature “E-CR-Glass” is used for boron- free modified E-Glass compositions for improved resistance to corrosion by most acids. 4.3 “S” Glass—A family of glasses composed primarily of the oxides of magnesium, aluminum, and silicon with a certified chemical composition which conforms to an appli- cable material specification and which produces high mechani- cal strength. 4.4 “R”Glass—A family of boron-free glasses composed primarily of the oxides of silicon, aluminum, calcium and magnesium, such glasses possessing excellent acid and water durability as well as specific strength and specific modulus levels significantly greater than E glass.
2.4 Military Standards and Specifications: MIL-P- 13949 Specification for Plastic Sheet, Laminated, Metal-Clad For Printed Wiring Board MIL-R-60346 Roving, Glass Fibrous (for Prepreg Tape, Rovings, Filament Winding, and Pulrusion Applications) MIL-G-55636B Glass Cloth, Resin Preimpreginated (B- STAGE) (For Multilayer Printed Wiring Boards) (Super- seded by MIIL-P- 139491981) MIL-Y-1140 Specification for Yarn, Cord, Sleeving, Cloth, and Tape-Glass MIL-C-9084 Specification for Cloth Finished for Resin L aminates (Cancelled 1999) 2.5 Institute for Interconnecting and Packaging Circuits Standard: IPC EG 4412 A Specification for Finished Fabric Woven from E-Glass for Printed Circuit Boards

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