CHARPY TESTING PER ASTM A370/E23
Charpy Impact Testing is conducted at ATRONA on a daily basis per ASTM A370/E23. We employ state of the art sample preparation and testing methods and equipment. Part size does not matter. Hardness of the part does not matter either. Our capabilities include 16 cutting machines ranging in size from high speed diamond saws to a very large double column band saw that can cut a 40" by 40" part. All saws are capable of cutting hard materials with carbide blades. We can also heat or cool the Charpy samples prior to testing or test at room temperature. See our competitive prices and fast turnaround times.
It is about toughness of the material. That is how materials are typically rated or specified. From Charpy Testing you can obtain ductile to brittle transition temperature DBTT and learn more about the material you plan to use or currently using. We can perform both v-notch or u-notch testing.
CHARPY TESTING: Measures the amount of energy absorbed during fracture of a specimen in a standard test. Testing includes sample preparation of 3 specimens per test. Usually applies to steels which exhibit temperature dependent behavior relating to toughness of the material at high strain. Toughness is typically related to direction of the rolling or grain flow of a forging. Materials are usually tougher along the direction of rolling and not as tough across the direction of rolling. This type of testing is typically required by welding codes in pressure vessels, valves and fittings used in the oil and gas industry, related piping, pipelines, outdoor structures, hi-rise buildings, towers, bridges, agricultural vehicles, industrial equipment, and more.
CHARPY V-NOTCH TEST SAMPLES
MATERIAL NEEDED: Specimens needed for Charpy Impact Testing are normally cut from the actual part or weldments using an abrasive cut off saw or a band saw with low heat input. Base metal specimen is 55 mm (about 2.25" inches) in length, 10 mm thick and 10 mm wide. Centerline of the Charpy specimen is notched according to standard with a special broach to create the required V-Notch with the appropriate dimensions and surface finish. Subsize specimens can be made with 7.5 mm x 10 mm or 5 mm x 10 mm or 2.5 mm x 10 mm. Threaded fasteners and pipe have special considerations.
ATRONA has two high capacity pendulum impact testers, including our Tinius Olsen unit (pictured above); which features a specially-constructed concrete base to assure optimum stability and precision.
ATRONA also has not just one, but two fully-equipped machine shops and a Tensile Testing laboratory.
ASTM E23 CHARPY IMPACT TESTING:
Testing conducted at ATRONA per standards at room temperature, hot, or cold temperatures. We can also develop Ductile To Brittle Transition Temperature graph.