What are the Different Tensile Testing Procedures and Requirements?

TUBING, REBAR, WELDS, AND CASTINGS Along with Specimens and Fasteners

tension testing of fasteners’ tensile strength, yield strength, and ductility can all be determined through destructive tensile testing. The tensile test is conducted by Infinita Lab in line with established norms and criteria, such as those set forth by the American Society for Testing and Materials. Tensile testing is another name for this procedure.

RESULTS OF TENSILE TESTS

Infinita Lab provides metal tensile testing services. Small fasteners and large tubing and bolts are tested using separate models of testing equipment.

Low-Temperature Tensile Test  Machines in our tensile testing facility can handle loads ranging in size from 8 ounces to 600,000 pounds. We also conduct tensile tests at higher temperatures, up to 1800°F.

Materials, especially those used in the space industry, must be able to function when subjected to cryogenic temperatures. Materials cooled to -320°F in liquid nitrogen (LN2) can be evaluated by means of cryogenic tensile testing on both round and flat specimens.

All tensile test specimen types are reliably and quickly prepared to specification in our very own Machine Shop. Direct sales to clients of specimens are also possible.

Each order comes with a full set of test findings and a certified report of those results.

TENSILE TESTING CAPABILITIES THAT RUN THE GAME

• Full-Size Wedge and Axial Tensile Yield Strength of Bolts and Nuts
• Analyzing manufactured samples
• Large diameter pipes and rebar
• Tests of tensile strength at high temperatures
• Strength testing of castings and welds

NON-CONTACT OPTIC EXTENSIOMETER

Our 60K tensile machine is equipped with an Epsilon ONE® optical non-contact extensometer for even more varied testing. Axial strain and displacement can be measured without physical touch, making this method suitable. Non-contact measurement of a wide range of strain values, including the very small strains required to measure the modulus of metals, is possible thanks to its excellent resolution and ISO 0.5 / ASTM B-1 accuracy classes. Brittle, porous, or additively created materials can all be tested successfully using a non-contact extensometer.

TESTING PROCEDURES AND REQUIREMENTS

600,000 pound tensile strength

• A370, B556, D638, E8, E21, EN 2002-1, EN 10002-1, ISO 527-1, ISO 6892-1, and a slew of other standards for testing fasteners

• ISO 898-1 ISO 898-2 NASM-1312-8 (formerly MIL-STD-1312-8) ASTM A962 ASTM F606 ASTM F835

• Specs: SAE J429, J995

THE STRESS-TESTING PROCESS

The tensile or tension test method is used to determine a material’s strength by subjecting a sample to an increasing load until it breaks. A stress-strain curve is generated to display the material’s response to the tensile test. Tensile testing gives the following quantitative measurements that are used to identify the mechanical properties of materials:

• Ultimate tensile strength (UTS) is the greatest tensile stress borne by the specimen during testing and is calculated by dividing the applied load by the specimen’s initial cross-sectional area.
• The yield strength of a material is the stress at which it first shows signs of yielding, or persistent (plastic) deformation.
• Elongation, which is the strain at or after the point of fracture, and area reduction following fracture are the most common ductility measures.

Top and bottom grips on the tensile or universal testing machine hold the test sample firmly in place. The tension test involves pulling and stretching the specimen while the grips are gradually opened. The stress and strain on the specimen, as measured by the force applied and the distance moved, are recorded continuously and plotted until failure occurs.

After the tensile test specimen has broken, the technician will determine the material’s tensile strength, yield strength, and ductility. Elongation is calculated by reassembling the test specimen and comparing the resulting length to the original length. The area is reduced by comparing the initial cross section measurement with the final cross section.

Observing how a material responds to both heat and stress, as in elevated temperature tensile testing, is a tried and true technique. Our test carousel has the capacity to treat up to three specimens at once while performing an enhanced temperature tensile test. When the temperature is reached, the specimen is left to soak in our computer-controlled system. Then, the specimen is inserted into the test frame, and the strain is monitored using a state-of-the-art extensometer.

Observe the procedure of the test.

ANALYSIS OF SKILLS

• Full-size tube, rebar, and fasteners; wedge and axial; yield strength; high temperature; weld and casting are all examples of what can be tested with tensile strength.
• Tensile Profile: Yield strength, ductility, elongation, and tensile testing
• Load capacities ranging from 8 ounces to 600,000 pounds
• Metals were used for the testing.
• The Machine Shop at Infinita Lab has prepared round and flat tensile specimens for testing.

Video 01: Tensile Testing Basics