Charpy Impact Testing Services


Charpy impact testing (also known as a Charpy V-Notch test) is a valuable method to determine the amount of energy a material absorbs during fracture. The test is performed when a pendulum head is dropped from a specified height and impacts a notched specimen of material. By comparing the difference in the height of the hammer before and after the fracture, one can measure the energy absorbed.

This provides information on the material's notch toughness and helps understand temperature-dependent ductile-brittle transition. Ductile vs. brittle fracture can be compared by looking at the shear areas of broken Charpy specimens to estimate a percentage of each.

IMR Test Labs offers Charpy impact testing to several specifications, at temperatures from -320°F to 400°F.

charpy samples


Best for determining the strength of a coating, Gardner impact testing does not use a pendulum, but instead a column with a weight at the top and an impactor that sits on top of the sample.

Specimens are placed under the striker, and a weight is dropped from a known height, impacting the specimen with a known energy. 

IMR has several weights and scales to accommodate a wide range of specimens.  IMR's lab in New York is accredited for methods ASTM D2794 and ASTM D5420.

If you're interested in exploring IMR's impact testing capabilities, click here to request a quote, or click on the button below..

Abrasion (Taber)
Adhesion (Peel) Testing
Bend Testing
Bond Strength Testing 
Charpy Impact Testing  (-320°F  to 450°F) 
Climbing Drum Adhesion of Sandwich Composites
Coating Adhesion
Coating Shear Fatigue
Coefficient of Thermal Expansion by TMA
Composite Testing (Fiber Reinforced)
Compression Set
Compressive Properties
Core Shear Properties of Sandwich Construction by Beam Flexure
Creep and Stress Rupture Testing
DMA (Dynamic Mechanical Analyzer)
Elastic Modulus
Fatigue Testing
Filled Hole Tension & Compression
Flat-wise Tensile Testing
Flexural Properties
Floating Roller Peel Strength
Fracture Mechanics
Gel Time
Hardness (Rockwell, Brinell, Durometer, Shore, Barcol, Knoop, Vickers, Macro Vickers)
Heat Aging 
Heat Deflection by TMA 
Heat Treatment (furnace to 2100°F) 
Hydrogen Embrittlement 
Hydrostatic Pressure
Indentation Toughness
Interlaminar Shear
Jominy Hardenability
Lap Shear Testing
Machining & Specimen Preparation
Modulus of Rupture (MOR)
n-Value (Strain Hardening Exponent)
Open Hole Tension and Compression
Pipeline Integrity Testing
r-Value (Plastic Strain Ratio)
Residual Strength of Composites After Impact
Rotating Beam Fatigue 
Shear Testing of Rivets to ASTM B565, Single/Double
Short Beam Strength
Shot Peen Qualification
Single-Edged Notched beams (SENB)
Slow Strain Rate (G129)
Specimen Conditioning
Strain Gaging
Surface Roughness (ANSI/ASME B46.1)
T Peel Strength
Tear Resistance of Films & Sheeting
Tear - Rubbers & Elastomers
Tensile Testing
Torsional and Axial Fatigue (200 lb)
Tube Testing (Tensile, Flare, Hydrostatic)
Welder & Procedure Qualification
Wire/Spring Testing (Wrap, Coil, Bend)
Young's, Tangent and Chord Modulus (Room Temperature)


  • ASTM A370
  • ASTM E23
  • ISO 148-1
  • JIS Z 2242


Click here for a complete list of accreditations and certifications for all IMR Test Labs locations.

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