This standard specifies the classification, order contents, dimension, shape, weight and permissible tolerance, technical requirements, test methods, inspection rules, as well as packaging, marking and quality certificate of tool and mould steels.
This standard is applicable to the hot-rolled, forged, cold-drawn and bright bar steels and machining steels for delivery, and their chemical compositions are also applicable to ingots, billets and their products.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.8 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Fluoride Separation - EDTA Titration Method for the Determination of Aluminium Content
GB/T 223.11 Iron Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method
GB/T 223.13 Methods for Chemical Analysis of Iron, Steel and Alloy - The Ammonium Ferrous Sulfate Titration Method for The Determination of Vanadium Content
GB/T 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The N-benzoy-N-phenylhydroxylamine Extraction Photometric Method for the Determination of Vanadium Content
GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Thiosulfate Separation Iodimetric Method for the Determination of Copper Content
GB/T 223.19 Methods for Chemical Analysis of Iron, Steel and Alloy - The Neocuproine-chloroform Extraction Photometric Method for the Determination of Copper Content
GB/T 223.22 Methods for Chemical Analysis of Iron, Steel and Alloy - The Nitroso-R-salt Spectrophotometric Method for the Determination of Cobalt Content
GB/T 223.23 Iron Steel and Alloy - Determination of Nickel Content - The Dimethylglyoxime Spectrophotometric Method
GB/T 223.26 Iron Steel and Alloy - Determination of Molybdenum Content - The Thiocyanate Spectrophotometric Method
GB/T 223.28 Methods for Chemical Analysis of Iron, Steel and Alloy - The α-benzoinoxime Gravimetric Method for the Determination of Molybdenum Content
GB/T 223.29 Iron Steel and Alloy - Determination of Lead Content - Carrier Precipitation - Xylenol Orange Spectrophotometric Method
GB/T 223.31 Iron Steel and Alloy - Determination of Arsenic Content - Distillation-molybdenum Blue Spectrophotometric Method
GB/T 223.43 Iron Steel and Alloy - Determination of Tungsten Content - Gravimetric Method and Spectrophotometric Method
GB/T 223.47 Methods for Chemical Analysis of Iron, Steel and Alloy - The Carrier Precipitation-Molybdenum Blue Photometric Method for the Determination of Antimony Content
GB/T 223.48 Methods for Chemical Analysis of Iron, Steel and Alloy - The Semixylenol Orange Photometric Method for the Determination of Bismuth Content
GB/T 223.50 Methods for Chemical Analysis of Iron, Steel and Alloy - The Phenylfuorone - CTMAB Direct Photometric Method for the Determination of Tin Content
GB/T 223.53 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame Atomic Absorption Spectrophotometric Method for the Determination of Copper Content
GB/T 223.54 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame Atomic Absorption Spectrophotometric Method for the Determination of Nickel Content
GB/T 223.58 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Arsenite-sodium Nitrite Titrimetric Method for the Determination of Manganese Content
GB/T 223.59 Iron Steel and Alloy - Determination of Phosphorus Content - Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony Phosphomolybdate Blue Spectrophotometric Method
GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy - The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content
GB/T 223.61 Methods for Chemical Analysis of Iron, Steel and Alloy - The Ammonium Phosphomolybdate Volumetric Method for the Determination of Phosphorus Content
GB/T 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy - The Butyl Acetate Extraction Photometric Method for the Determination of Phosphorus Content
GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium (Potassium) Periodate Photometric Method for the Determination of Manganese Content
GB/T 223.64 Iron Steel and Alloy - Determination of Manganese Content - Flame Atomic Absorption Spectrometric Method
GB/T 223.67 Iron Steel and Alloy - Determination of Sulfur Content - Methylene Blue Spectrophotometric Method
GB/T 223.68 Methods for Chemical Analysis of Iron, Steel and Alloy - The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content
GB/T 223.69 Iron Steel and Alloy - Determination of Carbon Contents - Gas-Volumetric Method after Combustion in the Pipe Furnace
GB/T 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy - The Gravimetric Method after Combustion in the Pipe Furnace for the Determination of Carbon Content
GB/T 223.72 Iron Steel and Alloy - Determination of Sulfur Content - Gravimetric Method
GB/T 223.76 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame Atomic Absorption Spectrometric Method for the Determination of Vanadium Content
GB/T 223.82 Steel and Iron - Determination of Hydrogen Content - Inert Gas Impulse Fusion Heat Conductivity Method
GB/T 223.85 Iron Steel and Alloy - Determination of Sulfur Content - Infrared Absorption Method after Combustion in an Induction Furnace
GB/T 223.86 Iron Steel and Alloy - Determination of Total Carbon Content - Infrared Absorption Method after Combustion in an Induction Furnace
GB/T 224 Determination of Depth of Decarburization of Steel
GB/T 225 Steel - Hardenability Test by End Quenching (Jominy Test)
GB/T 226 Test Method for Macrostructure and Defect of Steel by Etching
GB/T 230.1 Metallic Materials - Rockwell Hardness Test - Part 1: Test Method (Scales A, B, C, D, E, F, G, H, K, N, T)
GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1: Test Method
GB/T 702-2008 Hot-rolled Steel Bars - Dimensions, Shape, Weight and Tolerances
GB/T 905-1994 Dimension, Shape, Weight and Tolerance for Cold-drawn Round, Square and Hexagonal Steels
GB/T 908-2008 Forged Bars - Dimensions Shape Weight and Tolerances
GB/T 1979-2001 Standard Diagrams for Macrostructure and Defect of Structural Steels
GB/T 2101 General Requirement of Acceptance, Packaging, Marking and Certification for Section Steel
GB/T 3207-2008 Bright Steel
GB/T 4336 Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)
GB/T 6402-2008 Steel Forgings- Method for Ultrasonic Testing
GB/T 6394 Metal - Methods for Estimating the Average Grain Size
GB/T 10561-2005 Steel - Determination of Content of Nonmetallic Inclusions - Micrographic Method Using Standards Diagrams
GB/T 11261 Steel and Iron - Determination of Oxygen Content - The Pulse Heating Inert Gas Fusion - Infrared Absorption Method
GB/T 13298 Metal - Inspection Method of Microstructure
GB/T 14979-1994 Eutectic Carbide of Steel - Micrographic Method Using Standard Diagrams
GB/T 14981 Dimensions, Shape, Mass and Tolerances for Hot-rolled Wire Rods
GB/T 17505 Steel and Steel Products - General Technical Delivery Requirements
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition
GB/T 20123 Steel and Iron - Determination of Total Carbon and Sulfur Content - Infrared Absorption Method after Combustion in an Induction Furnace (Routine Method)
GB/T 20124 Steel and Iron - Determination of Nitrogen Content - Thermal Conductimetric Method after Fusion in a Current of Inert Gas (Routine Method)
GJB 937-1990 Measurement Method for Permeability of Feebly Magnetic Materials
ASTM A604 Standard Test Method for Macroetch Testing of Consumable Electrode Remelted Steel Bars and Billets
3 Classification
3.1 Steels are classified into eight classes by application:
a) Non-alloy steels for cutting tool and mould;
b) Measuring and cutting tool steels;
c) Impact resistance tool steel;
d) Rolling steel;
e) Cold-working mould steel;
f) Hot-working mould steel;
g) Plastic mould steel;
h) Special-purpose mould steel.
3.2 Steels are classified into two classes by the application and machining method:
a) Steel for pressure working UP:
1) Hot pressure working UHP;
2) Cold pressure working UCP.
b) Steel for cut working UC.
The application and machining method of steels shall be noted in the contract.
3.3 Steels are classified into four classes by chemical compositions:
a) Non-alloy tool steel ("T" is in the first place of designation);
b) Alloy tool steel;
c) Non-alloy mould steel ("SM" are in the first places of designation);
d) Alloy mould steel.
Note: Non-alloy tool steel is the original carbon tool steel.
