ASTM D695: Plastic Compressive Strength Modulus Testing Services
Accredited ASTM D695 plastic compressive strength modulus testing from Infinita Lab, performed to the exact standard requirements - accurate, reproducible results with full documentation for compliance, R&D, and quality control programs.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
What Is ASTM D695 Plastic Compressive Strength Modulus?
ASTM D695 is a standard test method for determining the compressive properties of rigid plastics.
This test assesses the behavior of a plastic under compressive force. The two critical mechanical properties that are obtained from this test are the compressive strength and the compressive modulus of the plastic. These properties are essential in determining the plastic’s resistance to compressive forces.
Applications and Benefits of ASTM D695 Plastic Compressive Strength Modulus Testing
Scope
ASTM D695 evaluates:
- Compressive strength of rigid plastics
- Compressive modulus (stiffness)
- Yield stress under compression
- Stress–strain behaviour
- Failure characteristics under compressive load
The method applies to reinforced and unreinforced rigid plastic materials.
Applications
- Structural plastic components
- Automotive interior and exterior parts
- Electrical enclosures
- Industrial housings
- Construction materials
- Medical device components
- Packaging structures
- Research and development
Benefits
- Provides standardized compressive property data
- Supports material selection and design
- Enables performance comparison of plastics
- Assists in quality assurance programs
- Helps predict in-service behavior
- Supports product development
- Ensures compliance with engineering specifications
Our ASTM D695 Testing Procedure
Specimen Preparation
Blocks or cylindrical specimens are prepared to specified dimensions.
1Fixture Setup & Alignment
The specimen is placed between the platens, and the crosshead is adjusted for proper contact.
2Compressive Loading
The load is applied steadily at a constant rate until failure.
3Strain Measurement & Data Recording
Deformation is measured with an extensometer, and load-displacement data are captured.
4ASTM D695 Test Parameters and Requirements
| Parameter | Details |
|---|---|
| Applicable Materials | Rigid plastics (reinforced & unreinforced) |
| Block Specimen Size | 12.7 × 12.7 × 25.4 mm (½ × ½ × 1 in.) |
| Cylindrical Specimen | 12.7 mm diameter × 25.4 mm length |
| ISO Specimen (Modulus) | 50 × 10 × 4 mm |
| ISO Specimen (Strength) | 10 × 10 × 4 mm |
| Loading Mode | Constant crosshead speed |
- Universal testing machine
- Compression platens
- Extensometer
- Load cell
- Data acquisition software
- Alignment fixtures
Equipment and Instrumentation Used for ASTM D695 Testing
What You Receive: Test Report, Data, and Certification
- Maximum compressive load
- Compressive strength (MPa or psi)
- Compressive modulus
- Stress–strain curve
- Yield stress (offset method)
- Failure mode description
- Comparative performance reports
- Quality control documentation
ASTM D695 Plastic Compressive Strength Modulus FAQs
ASTM D695 determines the compressive properties of rigid plastics, including compressive strength, modulus of elasticity, yield stress, and deformation behavior under compression.
The method applies to unreinforced and reinforced rigid plastics, including high-modulus composites. It is suitable for materials subjected to relatively low, uniform rates of strain or loading.
Compressive modulus, or modulus of elasticity in compression, indicates a material's resistance to deformation under compressive loading. A higher modulus generally indicates greater stiffness under the specified test conditions.
Not necessarily. Some plastics deform substantially without fracturing, continuing to flatten under compression. In such cases, a definitive compressive strength may not exist, and the result can depend on the specified deformation criterion.
ASTM D695 provides standardized compressive-property data for research and development, quality control, material qualification, and specification acceptance. The results can help compare materials and evaluate their suitability for applications involving compressive loads.
The ASTM D695 compression test evaluates the ability of rigid plastics to withstand compressive loads. A specimen is placed between compression plates in a universal testing machine and loaded at a controlled rate until failure or a specified deformation is reached. The results help determine compressive strength, yield stress, and modulus of elasticity.
ASTM D695 is the standard test method for determining the compressive properties of rigid plastics, including reinforced and unreinforced materials. It measures properties such as compressive strength, yield stress, and compressive modulus. The standard supports material comparison, quality control, and product development.
ASTM D 695 works by applying a steadily increasing compressive load to a prepared plastic specimen under controlled test conditions. The testing machine records the applied force and specimen deformation. These measurements are used to calculate compressive stress and strain and evaluate the material’s response to compression. Test conditions and specimen dimensions follow the applicable standard and material specifications.
Why Choose Infinita Lab for Plastic Compressive Strength Modulus Testing
When your Plastic Compressive Strength Modulus results have to hold up - for compliance, a customer audit, or an engineering decision - ASTM D695 accuracy and an unbiased third-party report matter more than price. Infinita Lab routes your ASTM D695 plastic compressive strength modulus testing to ISO/IEC 17025-accredited U.S. partner labs with hands-on method experience, so you get defensible data, transparent reporting, and turnaround times built around your project deadline - not ours.
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