Since 1970



Hardness Testing



Including Metallography and Magnetic Properties Evaluation





Heat Treating Process

Heat treating is designed to change the material properties of various types of metals in order to achieve a desired effect. The process involves using a furnace to "soak" or cook the steel at a specific temperature for a specific amount of time with pre-heat and ramp down cycles at a prescribed rate. Various cooling and quenching techniques can then be employed, to alter the micro-structure. Physical properties such as hardness, strength, toughness, and ductility can be manipulated to optimize the performance of an alloy.


Hardness Testing and Metallography​

  • Rockwell (HRA, HRB, HRC, HR15N, HR30N): ASTM E18, A370
  • Brinell (HBW): ASTM E10
  • Macro: ASTM E92
  • Microhardness (HV0.5, HV1.0): ASTM E384
  • Metallography
  • Magnetic properties based Material Evaluation


Tensile Testing





The tension or tensile test is which related to the mechanical testing of steel products subjects a machined or full-section specimen of a material under examination to a measured load sufficient to cause rupture, and is defined by ASTM E8 - Standard Test Method for Tension Testing of Metallic Materials.


At room temperature, KHT's test covers the tensile testing of metallic materials to determine material characteristics such as:


•Ultimate tensile strength,

•Yield strength,

•Elongation

•Reduction of area.


Tensile tests provide information on the strength and ductility of materials under uni-axial tensile stresses.


It is the function of the gripping or holding device of the tensile testing machine to transmit the load from the crossheads of the machine to the specimen under test. The essential requirement is that the load is transmitted axially. This implies that the centers of the action of the grips are in alignment with the axis of the specimen at the beginning of, and during the test such that bending or twisting be held to a minimum.



Magnetic Particle Inspection





Magnetic particle inspection is very sensitive non-destructive testing (NDT) method for use on ferrous materials.


It can detect minute cracks open to the surface as well as some sub-surface discontinuities. Magnetic particle inspection is one of the most economical and fastest ways to ensure that ferrous materials are safe and ready for use in the field.


Any defect in the surface or just under the surface of the subject material will distort the magnetic field surrounding it, causing the particles in the carrier fluid to be drawn to it. If there are no flaws in the material, the particles within the magnetic field will remain evenly distributed throughout.

  • Fluorescent magnetic particle inspection services are offered for inspection of machined aerospace components.
  • The stationary bench type equipment has got maximum capacity of 6000 amperes 3 phase FWDC.
  • The system meets the requirements of ASTM E1444 and the specifications of the most of the aerospace primes.
  • The technique sheets are prepared and approved by certified NAS410 Level III. The MPI system is also in line with NADCAP requirements
  • NADCAP and Boeing Approved


Shot Peening





Shot peening is a process specifically designed to enhance the fatigue strength of components which are subject to high alternating stress.


Surface treatment procedures like grinding, milling, bending or heat treatment procedures cause Tensile Residual Stress. This Tensile Residual Stress leads to low life cycles of the parts.


Shot Peening converts Tensile Residual Stress into Compressive Residual Stress which leads to significant increases in the life cycle of parts and their maximum load capacities.



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