• ASTM D7474-12

ASTM D7474-12

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

ASTM International, 04/01/2012

Publisher: ASTM

File Format: PDF

$26.00$52.00


Published:01/04/2012

Pages:4

File Size:1 file , 72 KB

Note:This product is unavailable in Russia, Ukraine, Belarus

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 D6394 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 1 - There is no known ISO equivalent for this standard.

More ASTM standard pdf

ASTM E399-90(1997)

ASTM E399-90(1997)

Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials

$41.00 $83.00

ASTM G105-89(1997)e1

ASTM G105-89(1997)e1

Standard Test Method for Conducting Wet Sand/Rubber Wheel Abrasion Tests

$29.00 $58.00

ASTM E1527-97

ASTM E1527-97

Standard Practice for Environmental Site Assessments: Phase 1 Environmental Site Assessment Process

$41.00 $83.00

ASTM C717-00

ASTM C717-00

Standard Terminology of Building Seals and Sealants

$32.00 $65.00