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Significance and Use
This guide is intended to serve as a reference to the plastics community for material properties needed in engineering design.
Product datasheets or product literature typically report single-point values at ambient conditions and hence, by their very nature, are inadequate for engineering design and structural analysis of a component or system. A detailed property profile for the particular grade chosen for a given part not only enhances the confidence of the design engineer by allowing a more realistic assessment of the material under close-to-actual service environments but also may avoid premature failure of the designed component and potential liability litigation later. Additionally, it would also eliminate use of larger “design safety factors” that result in “overengineering” or “overdesign.” Not only is such overdesign unwarranted, but it adds to the total part cost, resulting in a good example of ineffective design with plastics and a prime target for substitution by other materials.
One of the problems faced by design engineers is access to comparable data among similar products from different material suppliers because of the lack of standardized reporting format in the plastics industry. ISO 10350.1, ISO 11403-1, and ISO 11403-2 are intended to address the comparability of data issue only as far as single-point and multipoint data for material selection. This guide attempts to serve as a means to standardize the format to report comparable data for engineering design. It is essential that incorporating standardized test specimen geometry and specific test conditions as recommended in Guide D1999, Practice D3641, or ISO 3167 and ISO 294-1 are an integral part of the data generation.
1.1 This guide covers the essential material properties needed for designing with plastics. Its purpose is to raise the awareness of the plastics community regarding the specific considerations involved in using the appropriate material properties in design calculations.
1.2 This guide is intended only as a convenient resource for engineering design. It should be noted that the specific operating conditions (temperature, applied stress or strain, environment, etc. and corresponding duration of such exposures) could vary significantly from one application to another. It is, therefore, the responsibility of the user to perform any pertinent tests under actual conditions of use to determine the suitability of the material in the intended application.
1.3 The applicable ISO and ASTM standard methods for the relevant material properties are listed in this guide for the benefit of design engineers.
1.4 It should be noted that for some of the desired properties, no ASTM or ISO standards exist. These include pvT data, no-flow temperature, ejection temperature, and fatigue in tension. In these instances, relying on available test methods is suggested.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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. Note 1—There is no similar or equivalent ISO standard.
Note 1—There is no similar or equivalent ISO standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents
D638 Test Method for Tensile Properties of Plastics
D695 Test Method for Compressive Properties of Rigid Plastics
D883 Terminology Relating to Plastics
D1435 Practice for Outdoor Weathering of Plastics
D1894 Test Method for Static and Kinetic Coefficients of Friction of Plastic Film and Sheeting
D1999 Guide for Selection of Specimens and Test Parameters from ISO/IEC Standards
D2565 Practice for Xenon-Arc Exposure of Plastics Intended for Outdoor Applications
D2990 Test Methods for Tensile, Compressive, and Flexural Creep and Creep-Rupture of Plastics
D2991 Test Method for Stress-Relaxation of Plastics
D3045 Practice for Heat Aging of Plastics Without Load
D3123 Test Method for Spiral Flow of Low-Pressure Thermosetting Molding Compounds
D3418 Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry
D3641 Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials
D3835 Test Method for Determination of Properties of Polymeric Materials by Means of a Capillary Rheometer
D4473 Test Method for Plastics: Dynamic Mechanical Properties: Cure Behavior
D5045 Test Methods for Plane-Strain Fracture Toughness and Strain Energy Release Rate of Plastic Materials
D5279 Test Method for Plastics: Dynamic Mechanical Properties: In Torsion
E6 Terminology Relating to Methods of Mechanical Testing
E228 Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
E1823 Terminology Relating to Fatigue and Fracture Testing
ICS Number Code 21.020 (Characteristics and design of machines, apparatus, equipment); 83.080.01 (Plastics in general)
UNSPSC Code 13100000(Rubber and elastomers)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D5592-94(2010), Standard Guide for Material Properties Needed in Engineering Design Using Plastics, ASTM International, West Conshohocken, PA, 2010, www.astm.orgBack to Top