Ancillary NDT Processes

  • Ancillary NDT processes available at Keighley Laboratories include:
  • Relative Magnetic Permeability
  • This assesses the capability of a magnetic material to support the development of the magnetic field.
  • Magnetic Permeability is the ability of a material to become magnetised, includes assessment to specifications such as BS 5884, ASTM A342 and A.U.W.E. 29108.
  • The equipment, an electronic Permeability Meter undertakes an accurate assessment of the materials relative permeability commonly referred to by the Greek letter µ and capable of measuring magnetic permeability in increments between 1.001µ to 1.999µ to a resolution of 0.001µ.
  • Ferrite Determination – electronic meter
  • Carried out using a portable Fischer Feritscope digital meter, industry proven, to determine the ferrite content of corrosion and acid resistant steels used in aggressive environments.
  • Data is stored on the instrument giving the operator instant results as to the levels of delta ferrite.
  • Ferrite determination can also be carried out metallographically.
  • Electrical Conductivity Measurement
  • Electrical conductivity is a property that measures how well a metal conducts electrical current and may also provide guidance on Heat Treatment condition, chemical composition, microstructure or mechanical properties.
  • The equipment measures electrical conductivity using the Eddy current method according to DIN EN 2004-1 and ASTM E 1004.
  • The high-precision instrument can be used for the following:
  • Determination of the electrical conductivity of non-magnetic materials i.e. aluminium alloys, copper, stainless steel, monitoring heat treatment processes (which may assist in determining the strength and hardness of materials such as wrought aluminium alloys in the aerospace and automobile industries) and for the inspection of heat treatment damage.
  • Coating Thickness Checks
  • Various portable units are available for measuring coating thickness on all metallic materials, both ferrous and non-ferrous, based on magnetic or Eddy Current principles.
  • Coating thickness checks can also be carried out metallographically if required.
  • Capability to check the total thickness of some anodised coatings on aluminium and electroplated coatings of zinc, chromium and copper etc.
  • Relative Magnetic Permeability can be carried out in-house or on-site
  • Fast accurate results
  • Can be carried out on components or test samples
  • Does not damage the component
  • Ferrite Determination can be carried out in-house or on-site
  • Fast accurate results
  • Can be carried out on test samples and many different component parts of fabricated assemblies
  • Does not damage component
  • As a comparator against a test being carried out metallographically
  • Used to validate various Stainless Steels, including welds, to ensure that corrosion resistance is maintained.
  • Electrical Conductivity Measurement
  • Can be used to validate that Heat Treatment of Aluminium Alloys has been carried out correctly.
  • Used routinely by the Aerospace manufacturing industry for quality control on Heat Treated Aluminium Alloys.
  • Can be carried out in-house or on-site.
  • Fast accurate results.
  • Can be carried out on test samples or components.
  • Non-destructive test preserving component.
  • Coating Thickness Checks
  • Can be carried out in-house or on-site.
  • Fast accurate results.
  • Can be carried out on test samples or components.
  • Non-destructive test preserving component.
  • Used as a pre-selector for subsequent metallographic examination for local thickness.
  • Relative Magnetic Permeability
  • Typical materials that can be tested include:-austenitic stainless steels, austenitic irons and copper alloys such as aluminium bronze and     some non-metallic materials.
  • Various standards can be applied, using our in-house accredited documented methods based on BS 5884, ASTM A342 and A.U.W.E. 29108.
  • Ferrite Determination
  • Data is stored on the instrument giving the operator instant results as to the levels of delta ferrite.
  • The applications for this instrument are numerous and include austenitic stainless steel and welds, super duplex stainless steels, duplex stainless steels and welds, clad materials etc.
  • Electrical Conductivity Measurement
  • The equipment measures electrical conductivity using the Eddy current method according to DIN EN 2004-1 and ASTM E 1004.
  • Determination of the electrical conductivity of non-magnetic materials i.e. aluminium alloys, copper, stainless steel, monitoring heat treatment processes, determining the strength and hardness of wrought aluminium alloys in the aerospace and automobile industries and for the inspection of heat treatment damage.
  • Coating Thickness Checks
  • Typical materials that can be tested include: Paints, varnishes and plastic coatings on ferrous and non-ferrous materials such as aluminium alloys, stainless steels, steels and irons.
  • Typical materials include coatings on aluminium and electroplated coatings of zinc, chromium and copper etc.

Matthew Mellor

Technical Services Director 

Carl Barker

Test House Manager

Roger Wheatley

Senior Technician NDT

Keith Blower

Technical Director

John Whitaker

Chief Chemist

Tom Varley

Chemical Analysis 

Graham Woodward

Chem Lab Supervisor

General Enquiries

Technical Services

Keighley Laboratories Ltd
Registered Office:
Croft House
South Street
Keighley
West Yorkshire
BD21 1EG
Registered in England 164811
UK Tel: +44 (0)1535 664211
Email: info@keighleylabs.co.uk

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