Tensile Testing

Specimens, Fasteners, Tubing, Rebar, Welds & Castings

Tensile Testing of metals and polymers is a destructive test process that provides information about the tensile strength, yield strength and ductility of the material. Laboratory Testing Inc., near Philadelphia, PA in the United States, performs the tensile test in accordance with industry standards and specifications, including ASTM tensile test methods. This process is also known as a tensile strength test or tension test.

fastener tensile testingTensile Test Capabilities

LTI performs tensile testing on both metal and plastic specimens. A variety of equipment is used to test specimens in all sizes, including small fasteners up to large tubing and bolts.

Tensile machines have load capacities from 8 oz. to 600,000 lb. Elevated temperature tensile testing is also offered to 1800°F.

For fast turnaround, all types of tensile specimens are prepared to specification in our own Machine Shop. Specimens are also available to customers for direct purchase.

A certified tensile test lab report is provided with each order and includes complete test results.

Range of Tensile Testing Services

  • Tensile test to 600,000 lbs.Wedge & axial tensile
  • Full-size yield strength of fasteners
  • Testing of machined specimens
  • Full-size tubing
  • Full-size rebar
  • Elevated temperature tensile testing
  • Tensile testing of welds and castings

Test Methods/Specifications

  • ASTM A370
  • ASTM B557
  • ASTM E8
  • ASTM E21
  • EN 2002-1
  • EN 10002-1
  • ISO 6892-1

Fastener Testing

  • ASTM A962
  • ASTM F606
  • ASTM F835
  • ISO 898-1
  • ISO 898-2
  • NASM-1312-8 (Formerly MIL-STD-1312-8)
  • SAE J429
  • SAE J995

The Tensile Test Process

Material strength testing, using the tensile or tension test method, involves applying an ever-increasing load to a test sample up to the point of failure. The process creates a stress/strain curve showing how the material reacts throughout the tensile test. The data generated during tensile testing is used to determine mechanical properties of materials and provides the following quantitative measurements:

  • Tensile strength, also known as Ultimate Tensile Strength (UTS), is the maximum tensile stress carried by the specimen, defined as the maximum load divided by the original cross-sectional area of the test sample.
  • Yield strength is the stress at which time permanent (plastic) deformation or yielding is observed to begin.
  • Ductility measurements are typically elongation, defined as the strain at, or after, the point of fracture, and reduction of area after the fracture of the test sample.

The test sample is securely held by top and bottom grips attached to the tensile or universal testing machine. During the tension test, the grips are moved apart at a constant rate to pull and stretch the specimen. The force on the specimen and its displacement is continuously monitored and plotted on a stress-strain curve until failure.

The measurements, tensile strength, yield strength and ductility, are calculated by the technician after the test specimen has broken. The test sample is put back together to measure the final length, then this measurement is compared to the pre-test or original length to obtain elongation. The original cross section measurement is also compared to the final cross section to obtain reduction in area.

elevated_temperature_tensile_testElevated Temperature Tensile Testing is a proven method of evaluating the behavior of materials under a combination of heat and tension. When performing an elevated temperature tensile test, the specimen is placed inside a furnace on our test carousel, which is capable of processing up to three specimens at a time. Our computer-controlled system heats the specimen to the required temperature, then allows it to soak. Next, the specimen is loaded into the test frame, where an extensometer in the latest design measures the strain on the specimen as the load is increased.
Watch how the test is performed.

Summary of Capabilities

  • Types of Tensile Testing – full-size tubing, rebar, fasteners; wedge & axial; yield strength; elevated temperature; weld and casting
  • Tensile Profile – tensile strength test, yield strength, ductility and elongation
  • Equipment Capacity – from 8 oz. to 600,000 lb. load
  • Materials Tested – metals and polymers
  • Specimen Preparation – round and flat tensile specimens prepared by LTI’s Machine Shop

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  • A2LA and NADCAP accreditations
  • ISO 17025 certification
  • Same day, next-day, 2nd-day Rush Services
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  • Fast Certified Reports sent by email

Customer Testimonials

“Please give your team a huge thank you from Penn Engineering-Atlas for expediting this high priority job for us. We appreciate your continued reliable and professional service.”

Jim Fleck,
Penn Engineering Atlas Products


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