Metallurgical Laboratory Services

Dunlop NDT Metallurgical Lab ServicesMetallurgy is used to study and produce metals for many different industries. The information obtained by studying the physical and chemical behavior of metals can be used to determine the suitability of a metals for its end use.

A tremendous amount of information can be gained by several methods of metallurgical testing. DNDT’s metallurgical lab can perform many tasks including microhardness survey studies, check case hardening, case depth, grain structure and inspection of joints for weld profile. The microstructures of a metal can be evaluated to reveal traits like strength, toughness, ductility, and hardness along with a number of other important characteristics.

DNDT uses the information obtained by metallurgical testing and relates it to the day-to-day use of materials. DNDT has the ability to perform a simple evaluation of the internal structure of a material and compare it to specific codes or standards. Our engineers will discuss the project requests and intended testing to generate a report with the information that will satisfy your testing needs.

DNDT has outfitted our metallurgical and supporting mechanical laboratory with some of the latest equipment to meet your testing needs with capabilities including:

  • Digital Microscopy
  • Grain Size Analysis
  • Hardness Testing – Brinell up to 3K kg
  • Hardness Testing – Rockwell (B, C, N & T)
  • Macro Etching
  • Metallography Services
  • Microhardness – Knoop & Vickers
  • Polishing and Mounting Presses

Common Testing Standards and Codes

Our Metallurgical Lab can test to many different Industry Standards and codes including:

  • ASTM – American Society for Testing and Materials
    • A370 – Standard Test Methods and Definitions for Mechanical Testing of Steel Products
    • E3 – Standard Guide for Preparation of Specimens
    • E45 – Standard Test Methods for Determining the Inclusion Content of Steel
    • E23 – Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
    • E18 – Standard Test Method for Rockwell Hardness of Metallic Materials
    • E112 – Methods for Determining the Average Grain Size Complete Set – ADJE112CS
    • E384 – Standard Test Method for Knoop and Vickers Hardness of Materials
  • ASME – American Society of Mechanical Engineers
    • BPVC Section II – Materials
    • BPVC Section III
    • BPVC Section VIII
  • API – American Petroleum Institute
    • 1104 – Welding of Pipelines and Related Facilities
  • AWS – American Welding Society
    • D1.1 – Structural Welding (steel)
    • D1.2 – Structural Welding (aluminum)
    • D1.5 – Bridge Welding
    • D1.6 – Structural Welding (stainless steel)