At Kiyo R&D Lab, we provide precise flexural testing for plastics, composites, and engineering materials. Our NABL-accredited laboratory delivers accurate bend-stress analysis, deflection measurements, and failure-point determination to meet international standards including ASTM D790, ASTM D6272, and ISO 178.
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Flexural strength determines how a material bends, flexes, and recovers under stress. This is critical for:
Flexural testing ensures your materials meet design specifications, regulatory requirements, and real-world performance demands.
Standard flexural strength & modulus measurement. Sample supported at two points, load applied at centre. ASTM D790, ISO 178.
Two loads applied symmetrically, more uniform stress distribution. Ideal for composite & advanced materials. ASTM D6272, ISO 14125.
Rapid bend rate for impact & dynamic behaviour analysis. Essential for safety-critical applications. ASTM D6272 high-speed method.
Fibre-reinforced plastics, carbon composites, glass composites. Fibre-matrix interaction & failure mode evaluation. ASTM D3410, ISO 14125.
Complete load-deflection curves, yield point identification, strain at failure. Full material characterization in one test.
Production lot verification, incoming material inspection, consistency checks. Cost-effective sampling strategies.
| Standard | Scope & Application | Typical Use |
|---|---|---|
| ASTM D790 | 3-point bend test for unreinforced & reinforced plastics at standard rate (1.27 mm/min) | Engineering thermoplastics, phenolics, composites |
| ASTM D6272 | 4-point bend or high-speed 3-point bend for dynamic & impact assessment | High-performance composites, automotive trim |
| ISO 178 | Determination of flexural stress & strain for plastics (metric equivalent to ASTM D790) | ISO-regulated markets (EU, Asia, medical devices) |
| ISO 14125 | Flexural properties of fibre-reinforced plastic composites (3-point & 4-point bend) | Carbon, glass, aramid composites; aerospace & automotive |
| BS EN 2561 | Flex & tensile properties of fibre-reinforced resins (UK/European standard) | European aerospace & defence composites |
| ASTM D3410 | Compressive properties of polymer composites (includes bending analysis) | Composite material development & qualification |
Interior trim, door panels, structural composites
Thermoplastics, thermosets, engineering resins
Carbon, glass, aramid fibre composites
Housings, brackets, surgical instrument handles
Connector housings, insulation materials
Sporting equipment, furniture, appliances
NABL-accredited facility with complete flexural testing infrastructure.
ISO/IEC 17025:2017 certified lab serving automotive OEMs & suppliers.
Kiyo R&D Lab delivers NABL-accredited flexural testing with fast turnaround & precise results. Whether you’re developing new materials, qualifying production batches, or meeting regulatory requirements, our Chennai & Oragadam facilities are ready to help.
Get a quote & technical consultation today. Contact us now.
In 3-point bend, the load is applied at the centre of the sample, creating maximum stress directly under the load point. In 4-point bend, two loads are applied symmetrically, creating a uniform stress zone between the load points. 4-point bend is more representative of real-world bending scenarios and reduces edge-effect errors. Choose 3-point for standard QA; choose 4-point for precise material characterization & composites.
A standard flexural test (ASTM D790 or ISO 178) takes 5–15 minutes per sample, depending on material stiffness & deflection. Test setup & sample prep typically add 30 minutes. We can test multiple samples in parallel. For an urgent batch of 5 samples, expect results within 2–4 business days.
Yes. We can perform flexural testing at elevated (up to 150°C) or low temperatures (down to −20°C), following ASTM D638 conditioning protocols. Temperature-dependent flexural behaviour is critical for automotive & aerospace applications. Contact us for custom temperature profiles.
Our NABL-accredited reports include: flexural strength (MPa), flexural modulus (GPa), deflection at failure (mm), yield point (if applicable), stress-strain graphs, failure photographs, test conditions, & uncertainty of measurement. Reports are customizable for your regulatory or internal requirements.
ASTM D790 & ISO 178 specify 127 mm long × 12.7 mm wide × 3–5 mm thick samples. Custom geometries & smaller samples can be tested; specify your constraints upfront. We’ll advise on minimum sample size for accurate results.
Yes. Kiyo R&D Lab is NABL-accredited under ISO/IEC 17025:2017 for flexural testing on plastics & composites. All test results carry accreditation certification. Our reports are accepted globally for regulatory submissions, ISO audits, & client approvals.
