ASTM D7211-13
Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use

Standard No.

ASTM D7211-13

Release Date

2013

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7211-13(2018)

Latest

ASTM D7211-23

Scope

1.1 This specification is intended to be a means of calling out finished machined parts ready for commercial use.

1.2 This specification establishes requirements for parts machined from unplasticized, 1008201;% polychlorotrifluoroethylene (PCTFE) homopolymers.

1.3 This specification does not cover parts machined from PCTFE copolymers, PCTFE film or tape less than 0.25-mm (0.010-in.) thick, or modified PCTFE (containing pigments or plasticizers).

1.4 This specification allows for parts containing regrind and recycled material.

1.5 The specification does not cover PCTFE parts used in aerospace applications involving storage and handling of oxygen media, air media, inert media, and certain reactive media (specifically ammonia, gaseous hydrogen, and liquid hydrogen), in which dimensional stability, high molecular weight, molecular weight retention, and crystallinity control are important considerations. For aerospace grade, machined PCTFE parts, use Specification D7194.

1.6 Application—PCTFE parts covered by this specification are made of 1008201;% PCTFE resin, free of plasticizers, fillers, or other additives. The parts meet specific physical characteristics appropriate for their end use, and are typically used in applications requiring good electrical properties or resistance to aggressive chemical media. General purpose PCTFE parts include seals, gaskets, valve and pump parts (cryogenic and noncryogenic), translucent tubing, sight glasses, flowmeter tubes, heavy-walled solid pipes and fittings, gears, cams, bearings, laboratory ware, circuit boards, electrical connector covers and switches, radome covers, and a variety of other stock shapes. They are removed and replaced during normal maintenance procedures. The parts also experience static or dynamic mechanical loading, and temperatures ranging from cryogenic to temperatures at or above the glass transition temperature, T_g = 55°C (131°F).

Note 1—Quick-quenched PCTFE will potentially exhibit dimensional relaxation in the vicinity of T_g.

Note 2—Although no recommendations are made regarding the limiting upper use temperature of PCTFE, the heat deflection temperature of PCTFE as determined by Test Method D648 is 126°C (259°F).

1.7 The values stated in SI units are to be regarded as standard. The values in parentheses are for information only.

1.8 The following precautionary caveat pertains only t......

ASTM D7211-13 Referenced Document

• ASTM D1430 Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
• ASTM D1600 Standard Terminology for Abbreviated Terms Relating to Plastics
• ASTM D2117 Standard Test Method for Melting Point of Semicrystalline Polymers by the Hot Stage Microscopy Method
• ASTM D4591 Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
• ASTM D618 Standard Practice for Conditioning Plastics for Testing
• ASTM D648 Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position*， 2024-04-20 Update
• ASTM D7194 Standard Specification for Aerospace Parts Machined from Polychlorotrifluoroethylene (PCTFE)
• ASTM D792 Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
• ASTM D883 Standard Terminology Relating to Plastics

ASTM D7211-13 history

• 2023 ASTM D7211-23 Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
• 2018 ASTM D7211-13(2018) Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
• 2013 ASTM D7211-13 Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
• 2006 ASTM D7211-06 Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
• 2005 ASTM D7211-05 Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use