Information on the most widely used ASTM standards within the materials testing industry
ASTM D638, plastic vice tensile grip
Tensile test fixture for plastics is based on the test standatd ASTM D638, determination of the tensile properties of unreinforced and reinforced plastics in the form of standard dumbbell-shaped test specimens when tested under defined conditions of pretreatment, temperature, humidity, and testing machine speed.
This test method is applicable for testing materials of any thickness up to 14 mm (0.55 in.). However, for testing specimens in the form of thin sheeting, including film less than 1.0 mm (0.04 in.) in thickness, ASTM standard D882 is the preferred test method. Materials with a thickness greater than 14 mm (0.55 in.) shall be reduced by machining.
General introduction
Tensile test fixture for plastics is based on the test standatd ASTM D638, determination of the tensile properties of unreinforced and reinforced plastics in the form of standard dumbbell-shaped test specimens when tested under defined conditions of pretreatment, temperature, humidity, and testing machine speed.
This test method is applicable for
testing materials of any thickness up to 14 mm (0.55 in.). However, for
testing specimens in the form of thin sheeting, including film less than
1.0 mm (0.04 in.) in thickness, ASTM standard D882 is the preferred
test method. Materials with a thickness greater than 14 mm (0.55 in.)
shall be reduced by machining.
Opening: 0 – 15 mm (depending on jaws)
Weight: 2.2 kg per pair of grips without jaws
Clamping force: 10 kN at 15 Nm torque
Main features
Simple and effective method to hold specimens;
Dual acting design, also for asymmetrical samples
Jaws articulate and provide a self-aligning and self-tightening effect.
Specification
| Model | Max. load | Dimensions (mm) | Weight | Connectionsize | Clamping width | ClampingLength |
| 5 | 5KN | A: 130 B: 104 C:40 | 1.3kg | M12 | 40/60/100 | 45 |
| 10 | 10KN | A: 190 B: 120 C:60 | 4.2kg | M16 | 40/60/100 | 50 |
| Model | Material | Flat clamping range | Vee clamping range | Working temp.(℃) | ||
| 5 | 45# steel | 0-10/10-20 | 4-10/10-18 | -70~250 | ||
| 10 | 45# steel | 0-10/10-20/20-26 | 4-10/10-18 | -70~250 | ||
Standard
ISO 527-3 Plastics - TENSILE PROPERTIES - PART 3: FOR FILMS AND SHEETS
ISO 527-3 is a common international standard that is used to determine the tensile properties of plastic film or sheeting - a plastic test specimen with a thickness less than 1 mm. The tensile properties include tensile strength, yield strength, yield strain, strain at break, and in some cases Young's Modulus. Due to the flexible, delicate nature of these plastic specimens, both gripping and strain measurement can be a challenge.
ISO 527-3 Tensile Test of Plastic Thin Film Sheet
It covers the specimen preparation requirements of thin plastic sheets and films. Thin plastic specimens created with the practices of ISO 527-3 are tensile tested with the practices of ISO 527-1. Thin plastic specimens created in accordance with ISO 527-3 are cut, or punched from a sheet of thin plastic. ISO 527-3 specifies that thin plastic film of sheet specimens must be free from cracks or scratches that will affect the tensile test. ISO 527-3 allows for four specimen geometries that can be used for tensile testing. There are three acceptable dogbone shaped specimens that are acceptable. Specimen created following ISO 527-3 can be used to determine the tensile properties of thin plastic sheets and films including the tensile modulus of elasticity and the tensile energy to break (TEB).
ISO 527-1 covers the test procedures for determining tensile properties of plastics and plastic composites. Tensile properties of plastics that are determined through the practices of ISO 527-1 include tensile strength, tensile modulus and other properties related to stress strain characteristics of plastic materials.
ISO 527-2 specifies the test conditions for determining the tensile properties of moulding and extrusion plastics, based upon the general principles given in ISO 527-1. The methods described in ISO 527-2 are selectively suitable for use with the following range of materials: rigid and semi-rigid thermoplastics moulding, extrusion and cast materials, including compounds filled and reinforced by, for example, short fibres, small rods, plates or granules but excluding textile fibres (see ISO 527-4 and ISO 527-5).
ISO 527-4 and ISO 527-5 are two key standards within the ISO 527 series for determining the tensile properties of fibre-reinforced plastic composites.
ISO 527-4 covers the general principles and tests for isotropic and orthotropic materials. ISO 527-5 provides specific procedures for testing unidirectional fiber-reinforced composites.
These standards are critically important because they provide a unified, reliable method to measure fundamental mechanical properties (like tensile strength, modulus, and strain) which are essential for material selection, quality control, structural design, and R&D in aerospace, automotive, wind energy, and sports equipment industries.
ASTM D638 determining the tensile properties of unreinforced and reinforced plastics using dumbbell-shaped (dogbone) specimens tested under closely controlled conditions of conditioning, temperature, humidity, and crosshead speed. For measuring the tensile mechanical properties of unreinforced and reinforced plastics, including thermoplastics, thermosets, molded plastics, and plastic composites.
ASTM D882: Standard Test Method for Tensile Properties of Thin Plastic Sheeting
ASTM D882 test methods is used to measure tensile properties including ultimate tensile strength, yield strength, elongation, tensile energy to break and tensile modulus of elasticity of thin plastic sheeting and films. The samples are cut in strips that minimally have to be eight times longer than wide. No dumbbell shape is cut for materials of that thickness. Cut samples need to be free of nicks and other cutting defects since they will have an important impact on the test results variation. The samples are tested in specific conditions of pre-treatment, sample orientation, temperature, humidity, and rate of pulling. ASTM D882 can be used for testing materials thinner than 1mm in thickness.
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