ASTM-D7474 2008

$35.75

D7474-08 Standard Practice for Determining Residual Stresses in Extruded or Molded Sulfone Plastic (SP) Parts by Immersion in Various Chemical Reagents

Published By	Publication Date	Number of Pages
ASTM	2008	4

Guaranteed Safe Checkout

Categories: 83.080.01 - Plastics in general, ASTM

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

1.1 This practice covers the evaluation of residual stresses in extruded profile or molded SP parts. The presence and relative magnitude of residual stresses are indicated by the crazing of the specimen part upon immersion in one or more of a series of chemical reagents. The specified chemical reagents were previously calibrated by use of Environmental Stress Cracking (ESC) techniques to cause crazing in sulfone plastics (SP) at specified stress levels.

1.2 This practice applies only to unfilled injection molding and extrusion grade materials of high molecular weight as indicated by the following melt flow rates: PSU 9 g/10 min, max., PESU 30 g/10 m, max, and PPSU 25 g/10 min, max. Lower molecular weight (higher melt flow) materials will craze at lower stress levels than indicated in Tables 1-3. (See Specification D 6394 for melt flow rate conditions.)

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

Note 1There is no equivalent ISO standard.

1.4 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Practice Significance and Use
2	Apparatus Reagents Safety Precaustions Test Specimen Conditioning Procedure TABLE 1 TABLE 2 TABLE 3
3	Report Keywords X1. CALIBRATION OF STRESS LEVELS ASSOCIATED WITH EACH CHEMICAL REAGENT X1.1 X1.2 X1.3 X1.4 X1.5 X1.6

Additional information

Standard Title	D7474-08 Standard Practice for Determining Residual Stresses in Extruded or Molded Sulfone Plastic (SP) Parts by Immersion in Various Chemical Reagents
Published Code	ASTM
Publication Date	2008
Pages Count	4
ICS Codes	83.080.01 - Plastics in general

Preview PDF


PDF Format	Searchable	Printable	Preview Now

ASTM-D7474 2008

PDF Catalog

Related products