1 Scope
This standard specifies order content, dimension, shape, weight, technical requirements, test methods, test rules, packaging, mark and quality certificate of continuously cast round billet for seamless steel tube rolling.
This standard is applicable to continuously cast round billet for seamless steel tube rolling.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this national standard. For dated reference, the subsequent amendments (excluding amending error in the text) to, or modifications 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 references are applied or not. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 222-1984 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 223.4 Alloyed steel - Determination of manganese content - Potentiometric or visual titration method
GB/T 223.5Steel 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 223.9 Methods for chemical analysis of iron, steel and alloy - The chrome azurol S photometric method for the determination of aluminium 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 Iron steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method
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 223.13 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 223.16 Methods for chemical analysis of iron, steel and alloy - The chromotropic acid photometric method for the determination of titanium content
GB/T 223.17 Methods for chemical analysis of iron steel and alloy - The diantipyrylmethane photometric method for the determination of titanium 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 223.24 Methods for chemical analysis of iron, steel and alloy - The extraction seperation-The dimethylglyoxime spectrophotometric method for the determination of nickel content
GB/T 223.25 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime gravimetric method for the determination of nickel content
GB/T 223.26 Iron steel and alloy - Determination of molybdenum content - The thiocyanate spectrophotometric method
GB/T 223.36 Methods for chemical analysis of iron, steel and alloy - The neutral titration method for the determination of nitrogen content after distillation separation
GB/T 223.37 Methods for chemical analysis of iron steel and alloy - The indophenal blue photometric methods for the determination of nitrogen content after distillation separation
GB/T 223.43 Iron steel and alloy - Determination of tungsten content - Gravimetryc method and spectrophotometric method
GB/T 223.49 Methods for chemical analysis of iron, steel and alloy Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare earth content
GB/T 223.53Methods 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 Methods for chemical analysis of iron, steel and alloy - The reduced molybdoantimonyl phosphoric acid photometric method for the determination of phosphorus content
GH/T 22.3.60 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 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 223.68 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 Methods for chemical analysis of iron, steel and alloy - The gas- volumetric method after combustion in the pipe furnace for the determination of carbon content
GB/T 223.7l 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 223.75 Methods for chemical analysis of iron, steel and alloy - The methanol distillation-curcumin photometric method for the determination of boron content
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 226 Etch test for macrostructure and defect of steels (GB/T 226-1991, neq ISO 4969: 1980)
GB/T 2101 General requirements of acceptance, packaging, marking, and certification for section steel
GB/T 4336 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-Alloy steel (routine method)
GB/T 11170 Method for photoelectric emission spectroscopic analysis of stainless steel
3 Order Content
Contracts or orders according to this standard shall include following contents:
a) Serial number of this standard;
b) Product name;
c) Grades of steel and relevant serial numbers of standards;
d) Dimensions;
e) Delivery length;
f) Order weight (or quantity);
g) Other special requirements.
