This standard specifies the classification, ordering information, dimensions, appearance and permissible deviation, technical requirements, test methods, inspection rules, packing, marking and quality certificate of carbon tool steels.
This standard is applicable to the hot-rolled, forged, cold-drawn and bright steels and rods of carbon tool steels, and their chemical compositions are also applicable to ingots, billets and their products.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to this standard are encouraged to research whether the latest editions of these labels are applied or not. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 222 "Permissible Tolerances for Chemical Composition of Steel Products"
GB/T 223.11 "Methods for Chemical Analysis of Iron, Steel and Alloy—The Ammonium Persulfate Oxidation Volumetric Method for the Determination of Chromium Content"
GB/T 223.12 "Methods for Chemical Analysis of Iron, Steel and Alloy—The Sodium Carbonate Separation-Diphenyl Carbazide Photometric Method for the Determination of Chromium 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 223.23 "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 223.43 "Iron Steel and Alloy-Determination of Tungsten Content—Gravimetryc Method and Spectrophotometric Method"
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 "Methods for Chemical Analysis of Iron, Steel and Alloy—The Reduced Molybdoantimonyl Phosphoric Acid Photometric Method for the Determination of Phosphorus Content"
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 223.68 "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 223.74 "Methods for Chemical Analysis of Iron, Steel and Alloy—The Combustion Gravimetric/gas-volumetric Method for the Determination of Combined Carbon Content"
GB/T 223.76 "Methods for Chemical Analysis of Iron, Steel and Alloy—he Flame Atomic Absorption Spectrometric Method for the Determination of Vanadium Content"
GB/T 224 "Determination of Depth of Decarburization of Steel"
GB/T 226 "Etch Test for Macrostructure and Defect of Steels"
GB/T 230.1 "Metallic Rockwell Hardness Test—Part 1: Test Method (Scales A, B, C, D, E, F, G, H, K, N, T) (GB/T 230.1-2004, ISO 6508-1: 1999, MOD)
GB/T 231.1 "Metallic Materials—Brinell Hardness Test—Part 1: Test Method"
GB/T 702 "Hot-rolled Round and Square Steel Bars—Dimension, Shape, Weight and Tolerance" (GB/T 702—2004, ISO 1035-1: 1980 Hot-rolled steel bars—Part 1: Dimensions of round bars, ISO 1035-2: 1980 Hot-rolled steel bars—Part 2: Dimensions of square bars, ISO 1035-4: 1982 Hot—rolled steel bars—Part 4: Tolerances, MOD)
GB/T 905 "Dimension, Shape, Weight and Tolerance for Cold-drawn Round, Square and Hexagonal Steels"
GB/T 908 "Forged Round and Square Steels Dimension, Shape, Weight and Tolerance"
GB/T 2101 "General Requirement of Acceptance Packaging, Marking and Certification for Section Steel"
GB/T 3207 "Bright Steel"
GB/T 4336 "Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)"
GB/T 1299-2000 "Alloy Tool Steels"
GB/T 13298 "Metal-Inspection Method of Microstructure"
GB/T 14981 "Dimensions, Shape, Mass and Tolerances for Hot-rolled Wire Rods" (GB/T 14981—2004, ISO/DIS 16124, MOD)
GB/T 17505 "Steel and Steel Products—General Technical Delivery Requirements" (GB/T 17505—1998, eqv ISO 404: 1992)
GB/T 20066 "Steel and Iron-Sampling and Preparation of Samples for the Determination of Chemical Composition" (GB/T 20066-2006, ISO 14284: 1996, IDT)
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—2006, ISO 15350: 2000, IDT)
GB/T 20125 "Low-alloy Steel—Determination of Multi-element Contents - Inductively Coupled Plasma Atomic Emission Spectrometric Method"
3 Classi?cation
3.1 Steels in accordance with the processing method are classi?ed into:
a) Steel UP for pressure processing, steel UHP for thermal pressure processing, steel UCP for cold pressure processing;
b) Steel UC for cutting processing.
The processing methods of steels shall be indicated in the contract.
3.2 Steels in accordance with the metallurgical quality grade are classi?ed into:
a) Quality steel;
b) High quality steel.
