| 1 | Metal, alloys and products | 19 | depth of decarburization | Determination of depth of decarburization of steels GB/T 224-2008 |
| 20 | area content of the α-phase | Micrographic method for determination area content of theα-phases in stainless steels GB/T 13305-2008 |
| 21 | coatings thickness | Metallic and oxide coatings-Measurement of coating inckness-Microscopical method GB/T 6462-2005 ISO 1463:2003 |
| 22 | nitrided case depth | Determination of nitrided case depth and metallographic microstructure examination for steel and iron parts GB/T 11354-2005 |
| 23 | metallographic examination for chemistry-heat treatment surface | Metallographic examination of carburized and hardened steel gears which used for locomotive traction TB/T 2254-1991 |
| Metallographic examination of carburized and hardened steel gears which used for heavy loading purpose JB/T 6141.3-1992 |
| 24 | case-hardened depth | Steels—Determination and verification of the depth of carburized and hardened cases GB/T 9450-2005 |
| 25 | thickness of hardened layers | Determination of total or effective thickness of thin surface hardened layers of steel parts GB/T 9451-2005 |
| 26 | macrostructure examination | Test method for macrostructure and defect of steel by etching GB/T 226-2015 |
| Standard diagrams for macrostructure and defect of structural steels GB/T 1979-2001 |
| Inspection method for structure of wrought aluminum and aluminum alloy products-Part 2:Inspection method for macrostructure GB/T 3246.2-2012 |
| 27 | macro metallographic | Destructive tests on welds in metallic materials — Macroscopic and microscopic examination of welds ISO 17639:2003 |
| Destructive tests on welds in metallic materials — Macroscopic and microscopic examination of welds GB/T 26955-2011 |
| 28 | decarburization test | Mechanical properties of fasteners - Bolts,screws and studs GB/T 3098.1-2010 |
| Mechanical properties of fasteners made of carbon steel and alloy steel -- Part 1: Bolts, screws and studs with specified property classes -- Coarse thread and fine pitch thread ISO 898-1:2013 |
| 29 | carburization test | Mechanical properties of fasteners - Bolts,screws and studs GB/T 3098.1-2010 |
| Mechanical properties of fasteners made of carbon steel and alloy steel -- Part 1: Bolts, screws and studs with specified property classes -- Coarse thread and fine pitch thread ISO 898-1:2013 |
| 30 | Uniform corrosionimmersion testing | Metals materials-Uniform corrosion-Methods of laboratory immersion testing JB/T 7901-1999 |
| 31 | Electrochemical properties | Test methods for electrochemical properties of sacrificial anodes GB/T17848-1999 |
| Cathodic Protection Design DNV RP B401-2017 |
