GB/T 28694-2012 Technical requirement of deep carburizing

GB/T 25744-2010 Metallographic examination for carburizing quenching and tempering of steel parts GB/T 224-1987 Determination of depth of decarburization of steel GB/T 224-2008 Determination of depth of decarburization of steels GB/T 224-2019 Determination of the depth of decarburization of steels GB/T 230.1-2004 Metallic Rockwell hardness test—Part1:Test method(scales A、B、C、D、E、F、G、H、K、N、T) GB/T 230.1-2009 Metallic materials—Rockwell hardness test—Part 1:Test method(scales A、B、C、D、E、F、G、H、K、N、T) GB/T 230.1-2018 Metallic materials—Rockwell hardness test—Part 1:Test method GB/T 683-1993 Chemical reagent—Methanol GB/T 683-2006 Chemical reagent—Methanol GB/T 3864-1996 Industrial nitrogen GB/T 3864-2008 Industrial nitrogen GB/T 4340.1-1999 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 4340.1-2009 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 4340.1-2024 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 4341-2001 Metallic materials—Shore hardness test GB/T 4341.1-2014 Metallic materials—Shore hardness test—Part 1:Test method GB/T 4341.2-2016 Metallic materials—Shore hardness test—Part 2:Verification of hardness testers GB/T 4341.3-2016 Metallic materials—Shore hardness test—Part 3:Calibration of reference blocks GB 5959.1-1986 Safety in electro heat installations—Part 1:General requirements GB 5959.1-2005 Safety in electro heat installations—Part 1:General requirements GB/T 5959.1-2019 Safety in installations for electroheating and electromagnetic processing—Part 1:General requirements GB 5959.4-1992 Safety in electro heat installations—Part 4:General requirements for resistance furnaces GB 5959.4-2008 Safety in electroheat installations—Part 4:Particular requirements for safety resistance heating installations GB 6819-1996 Dissolved acetylene GB 6819-2004 Dissolved acetylene GB/T 7232-1999 Terminology of metal heat treatment GB/T 7232-2012 Terminology of metal heat treatment GB/T 7232-2023 Metal heat treatment—Terminology GB/T 9450-2005 Steels—Determination and verification of the depth of carburized and hardened cases GB/T 9452-2003 Testing method for work zone of Heat treatment furnace GB/T 9452-2012 Testing method for working zone of heat treatment furnace GB/T 9452-2023 Test method for qualified work zone of heat treatment furnace GB/T 10067.4-2005 Basic specifications for electro heat installations—Part 4:Indirect resistance furnaces GB 15735-1995 Requirements for the safety and health in production process of metal heat treatment GB 15735-2004 Requirements for the safety and health in production process of metal heat treatment GB 15735-2012 Requirements for the safety and health in production process of metal heat treatment GB/T 16923-1997 Normalizing and annealing of steel parts GB/T 16923-2008 Normalizing and annealing of steel parts GB/T 16924-1997 Quenching and tempering of steel parts GB/T 16924-2008 Quenching and tempering of steel parts GB/Z 18718-2002 Energy saving directives for heat treatment GB/T 9450-2025 Determination of the case hardening depth for steel GB/T 3864-2025 Industrial nitrogen