GB/T 32540-2016 Technical requirements for accuracy-controlled gas nitriding heat treatment

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 536-1988 Liquefied anhydrous ammonia GB/T 536-2017 Liquefied anhydrous ammonia 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 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/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 8979-1996 Pure nitrogen GB/T 8979-2008 Pure nitrogen and high purity nitrogen and ultra pure nitrogen 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 10066.4-2004 Test methods for electro heat installations—Part 4:Indirect resistances furnaces GB/T 10067.4-2005 Basic specifications for electro heat installations—Part 4:Indirect resistance furnaces GB/T 11354-1989 Steel-iron parts—Determination of nitrided case depth and metallographic examination of nitriding structure GB/T 11354-2005 Determination of nitrided case depth and metallographic microstructure examination for steel and iron parts GB/T 15318-1994 Monitoring and testing method for energy saving of electroheat furnace in industrial heat treating GB/T 15318-2010 Monitoring and testing for energy saving of heat treatment electric furnace 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 17358-1998 Power consumption quota and its counting and testing method in heat treating production GB/T 17358-2009 Power consumption,measurement,and testing in heat treating production GB/T 18177-2000 Gas nitriding of steel parts GB/T 18177-2008 Gas nitriding of steel parts GB/Z 18718-2002 Energy saving directives for heat treatment GB/T 19944-2005 Fuel consumption quota and its counting and testing method for heat treating production GB/T 19944-2015 Fuel consumption calculation and measurement method in heat treating production GB/T 27946-2011 Limited value of hazardous substance in the air of heat treatment working place GB/T 30825-2014 Pyrometry for heat treatment GB/T 11354-2025 Determination of nitriding hardness depth and metallographic examination for steel GB/T 8979-2025 Pure nitrogen,high purity nitrogen and ultra pure nitrogen