This standard specifies the order contents, dimension, shape, technical requirements, test methods, inspection rules, and packing, marking and quality certificate of the high-carbon chromium bearing steel.
This standard is applicable to the hot-rolled or forged round steels, wire rods, cold-drawn (cold-rolled) round steels (vertical stripe or disc) and steel pipes that are of high-carbon chromium bearing steel and used for manufacturing bearing ring and rolling body. The continuously cast steel is not recommended to be adopted as the steel for manufacturing steel ball.
Based on the agreement of both the supplier and the purchaser, steels and steel billets of other varieties and specifications may also be supplied, and the specific requirements shall be noted in the contract.
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, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document referred to applies.
GB/T 222 “Method of Sampling Steel for Determination of Chemical Composition and Permissible Variations for Product Analysis”
GB/T 223.3 “Methods for Chemical Analysis of Iron, Steel and Alloy-The Diantipyrylmethane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content”
GB/T 223.5 “Methods for Chemical Analysis of Iron, Steel and Alloy; The Reduced Molybdosilicate Spectrophotometric Method for the Determination of Acid-soluble Silicon Content”
GB/T 223.10 “Methods for Chemical Analysis of Iron, Steel and Alloy-The Cupferron Separation-Chrome Azurol S Photometric Method for the Determination of Aluminium Content”
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 223.18 “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 “Methods for Chemical Analysis of Iron, Steel and Alloy - The Dimethylglyoxime Spectrophotometric Method for the Determination of Nickel Content”
GB/T 223.24 “Methods for Chemical Analysis of Iron, Steel and Alloy-The Extraction Seperation-The Dimethylglyoxime Spectrophotometric Method for the Determination of Nickel Content”
GB/T 223.26 “Methods for Chemical Analysis of Iron, Steel and Alloy-The Thiocyanate Direct Photometric Method for the Determination of Molybderum Content”
GB/T 223.27 “Methods for Chemical Analysis of Iron, Steel and Alloy-The Thiocyanate-butyl Acetate Extraction Spectrophotometric Method for the Determination of Molybdenum Content”
GB/T 223.29 “Methods for Chemical Analysis of Iron, Steel and Alloy-The Xylenol Orange Photometric Method for Determination of Lead Content after Carrier Precipitation”
GB/T 223.31 “Methods for Chemical Analysis of Iron, Steel and Alloy-The Distillation-Molybdenum Blue Spectrophotometric Method for the Determination of Arsenic Content”
GB/T 223.47 “Methods for Chemical Analysis of Iron, Steel and Alloy-The Carrier Precipitation-Molybdenum Blue Potometric Method for the Determination of Antimony 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” (eqv ISO/DIS 4940)
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” (neq ISO R 629)
GB/T 223.64 “Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame Atomic Absorption Spectrometric Method for the Determination of Manganese Content”
GB/T 223.67 “Methods for Chemical Analysis of Iron, Steel and Alloy-The Reducing Distillation-Methylene Blue Photometric Method for the Determination of Sulfur Content”
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 “Methods for Chemical Analysis of Iron, Steel and Alloy - The Alumina Chromatographic Separation - Barium Sulfate Gravimetric Method for the Determination of Sulphur Content”
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 224 “Determination of Depth of Decarburization of Steel” (eqv ISO 3887)
GB/T 231 “Metallic Materials--Brinell Hardness Test-Part 1: Test Method” (eqv ISO 6508.1)
GB/T 233 “Metallic Materials-Forging Test”
GB/T 702 “Hot-rolled Round and Square Steel Bars—Dimension, Shape, Weight and Tolerance”
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 1814 “Inspection Method for Steel Work Fractures”
GB/T 2101 “General Requirement of Acceptance Packaging, Marking and Certification for Section Steel”
GB/T 2102 “Acceptance, Packing, Marking and Certification of Pipe”
GB/T 4336 “Method for Photoelectric Emission Spectroscopic Analysis of Carbon Steel and Medium and Low Alloy Steel”
GB/T 11261 “Methods for Chemical Analysis of High Carbon Chromium Bearing Steel; The Pulse Heating Inert Gas Fusion; Infra-red Absorption Method for the Determination of Oxygen Content”
GB/T 14981 “Dimensions, Shape, Mass and Tolerances for Hot-rolled Wire Rods”
3 Order Contents
The order contract under this standard shall include the following technical contents:
a) Product name (or brand name);
b) Designation;
c) Number of standard;
d) Specification;
e) Weight and/or quantity;
f) Casting method (according to transverse casting where it is noted);
g) Processing purpose;
h) Delivery condition;
i) Items or indices that shall be negotiated the supplier and the purchaser and noted in the contract (selected by the supplier if not noted);
j) Other specific requirements proposed by the purchaser, for instance: special specification requirements, special surface quality requirements and other contents.
GB/T 18254-2000 The following standards are cited：
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