Metallurgy, Materials & Heat Treatment

QSC offers technical support on metallic materials, metallurgical processes, material certification, heat treatment and the evaluation of manufacturing or service-related material issues.

These services build on the company's original background in metallurgy and chemical treatments, and complement engineering, welding, inspection and quality assurance activities.

Hardness test in the laboratory
Tensile specimen after fracture
Weld macro section

Material Selection & Assessment

Typical materials include carbon steels, low-alloy steels, stainless and duplex stainless steels, nickel alloys, heat-resistant steels and other project-specific materials.

  • Material specifications and selection
  • Material substitution and equivalent grades
  • Material compatibility and corrosion resistance
  • Sour-service suitability (NACE MR0175 / ISO 15156)
  • Certification, identification and traceability

Heat Treatment

Review and monitoring cover treatment procedures, temperature cycles, thermocouple placement, heating and cooling rates, holding times, calibrated equipment and time-temperature records.

  • Post-weld heat treatment (PWHT)
  • Annealing and normalizing
  • Quenching and tempering
  • Solution treatment
  • Stress relieving

Chemical & Surface Treatments

QSC provides consultancy on chemical cleaning, pickling, passivation and other surface treatments, in line with environmental requirements and material compatibility.

Sour Service (NACE MR0175 / ISO 15156)

Assessment of materials for oil and gas equipment in H2S-containing environments to NACE MR0175 / ISO 15156: material and hardness requirements, heat-treatment condition, welding and weld hardness, and review of the material documentation.

Metallurgical Testing

  • Metallography: macro and micro examination
  • Hardness testing
  • Chemical composition analysis
  • Tensile and impact testing
  • Material identification
  • Review of laboratory reports

Where tests require an accredited laboratory, QSC coordinates and reviews the testing; it does not operate the laboratory itself.

Failure Analysis & Technical Investigation

  • Fracture investigation
  • Material degradation and corrosion
  • Welding defects
  • Premature failure and overheating
  • Inappropriate heat treatment
  • Hydrogen-related degradation
  • Root-cause analysis

Material Certification

  • EN 10204 inspection documents (2.2, 3.1, 3.2)
  • Material traceability and heat numbers
  • Positive Material Identification (PMI)
  • Material record review
  • Evaluation of compliance with specified requirements

Typical Deliverables

  • Material assessment reports
  • Sour-service compliance reviews
  • Heat-treatment review records
  • Failure analysis reports
  • Material certificate reviews
  • PMI reports

Related Services

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Metallurgy, Materials & Heat Treatment