GB/T 1220-2007 in English

1 Scope
This standard specifies dimension, shape, technical requirements, test method, regulation of inspection, packing, marking, and certification, etc. of stainless steel bar (rounds, squares, flats, hexagons, and octagons, hereinafter referred to as steel bar).
This standard is applicable to hot roll and forged stainless steel bar with dimension (diameter, side length, thickness or opposite side distance, hereinafter referred to as dimension) is no larger than 250mm. Negotiate by the parties, it may also be provided to hot roll and forged stainless steel bar with dimension is larger than 250mm.
2 Normative references
The following normative documents contain provision which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments to, or revision of, any of these publications do not apply. All standards are subject to revision, and parties to agreements basing on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T223.3 Methods for Chemical Analysis of Iron, Steel and Alloy; The Diantipyrylmethane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content
GB/T223.4 Methods for Chemical Analysis of Iron, Steel and Alloy; The Volumetric Method for Determination of Manganese Content by Ammonium Nitrate Oxidation
GB/T223.5 Methods for Chemical Analysis of Iron, Steel and Alloy The Reduced Molybdosilicate Spectrophotometric Method for the Determination of Acid-soluble Silicon Content
GB/T223.8 Methods for Chemical Analysis of Iron, Steel and Alloy—The Sodium Fluoride Separation-EDTA Titration Method for the Determination of Aluminium Content
GB/T223.9 Methods for Chemical Analysis of Iron, Steel and Alloy—The Chrom Azurol S Photometric Method for the Determination of Aluminium Content
GB/T223.11 Methods for Chemical Analysis of Iron, Steel and Alloy The Ammonium Persulfate Oxidation Volumetric Method for the Determination of Chromium Content
GB/T223.14 Methods for Chemical Analysis of Iron, Steel and Alloy—The N-benzoy-N-phenylhydroxylamine Extraction Photometric Method for the Determination of Vanadium Content
GB/T223.16 Methods for Chemical Analysis of Iron, Steel and Alloy The Chromotropic Acid Photometric Method for the Determination of Titanium Content
GB/T223.17 Methods for Chemical Analysis of Iron Steel and Alloy; The Diantipyrylmethane Photometric Method for the Determination of Titanium Content
GB/T223.18 Methods for Chemical Analysis of Iron, Steel and Alloy The Sodium Thiosulfate Separation Iodimetric Method for the Determination of Copper Content
GB/T223.23 Methods for Chemical Analysis of Iron, Steel and Alloy. The Dimethylglyoxime Spectrophotometric Method for the Determination of Nickel Content
GB/T223.25 Methods for Chemical Analysis of Iron, Steel and Alloy. The Dimethylglyoxime Gravimetric Method for the Determination of Nickel Content
GB/T223.26 Methods for Chemical Analysis of Iron Steel and Alloy; The Thiocyanate Direct Photometric Method for the Determination of Molybderum Content
GB/T223.28 Methods for Chemical Analysis of Iron Steel and Alloy; The α-denzoinoxime Gravimetric Method for the Determination of Molybdenum Content
GB/T223.36 Methods for Chemical Analysis of Iron, Steel and Alloy The Neutral Titration Method for the Determinaion of Nitrogen Content after Distillation Separation
GB/T223.37 Methods for Chemical Analysis of Iron Steel and Alloy; The Indophenal Blue Photometric Methods for the Determination of Nitrogen Content after Distillation Separation
GB/T223.40 Iron Steel and Alloy—Detetmination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method
GB/T223.52 Methods for Chemical Analysis of Iron, Steel and Alloy; The Hydroxylamine Hydrochloride-iodometric Method for the Determination of Selenium Content
GB/T223.58 Methods for Chemical Analysis of Iron, Steel and Alloy; The Sodium Arsenite-sodium Nitrite Titrimetric Method for the Determination of Manganese Content
GB/T223.59 Methods for Chemical Analysis of Iron, Steel and Alloy; The Reduced Molybdoantimonyl Phosphoric Acid Photometric Method for the Determination of Phosphorus Content
GB/T223.60 Methods for Chemical Analysis of Iron, Steel and Alloy The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content
GB/T223.61 Methods for Chemical Analysis of Iron, Steel and Alloy; The Ammonium Phosphomolybdate Volumetric Method for the Determination of Phosphorus Content
GB/T223.62 Methods for Chemical Analysis of Iron, Steel and Alloy; The Butyl Acetate Extraction Photometric Method for the Determination of Phosphorus Content
GB/T223.63 Methods for Chemical Analysis of Iron, Steel and Alloy; The Sodium (Potassium) Periodate Photometric Method for the Determination of manganese Content (GB/T223.63—1998, neq ISO R 629)
GB/T223.64 Methods for Chemical Analysis of Iron, Steel and Alloy; The Flame Atomic Absorption Spectrometric Method for the Determination of Manganese Content
GB/T223.67 Iron Steel and Alloy-Determination of Sulfur Content-Methylene Blue Spectrophotometric Method
GB/T223.68 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/T223.69 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/T223.71 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/T223.72 Methods for Chemical Analysis of Iron, Steel and Alloy The Alumina Chromatographic Separation-barium Sulfate Gravimetric Method for the Determination of Sulphur Content
GB/T226 Etch test for Macrostructure and Defect of Steels (GB/T226—1991, neq ISO4969; 1980, Steel—Macroscopic examination by etching with strong mineral acids)
GB/T228 Metallic Materials--Tensile Testing At ambient Temperature (GB/T 228—2002, eqv ISO 6892: 1998)
GB/T229 Metallic Materials-Charpy Notch Impact Test (GB/T 229—1994, eqv ISO 83: 1976, Steel Charpy impact test (U-notch), eqv ISO 148: 1983, Steel—Charpy impact test (V-notch))
GB/T230.1 (Metallic Rockwell Hardness Test—Part 1: Test Method (Scales A, B, C, D, E, F, G, H, K, N and T)) (GB/T 230.1 2004, ISO 6508: 1999, MOD)
GB/T231.1 Metallic Materials--Brinell Hardness Test--Part 1: Test Method (GB/T 231.1 2002, eqv ISO 6506-1: 1999)
GB/T702—2004 Hot-rolled Round and Squares bars—Dimension, Shape, Weight and Tolerance (GB/T 702—2004, ISO 1035-1: 1980, Hot rolled steel bar-Part 1: Dimension of round bars, ISO 1035-2: 1980 Hot-rolled steel bar-Part 1: Dimension of square bars, ISO1035-4: 1982, Hot-rolled steel bar-Part 4: Tolerances, MOD)
GB/T704—1988 Dimensions, Shape, Weight and Tolerances for Hot-rolled Flats
GB/T705—1985 Hot-rolled Hexagonal and Octagonal Steel Bars; Dimensions, Shape, Weight and Tolerance
GB/T908—1987 Forged Round and Squaress Dimension, Shape, Weight and Tolerance
GB/T1979 Standard Diagrams for Macrostructure and Defect of Structural Steels
GB/T2101 General Requirement of Acceptance Packaging Marking and Certification for Section Steel
GB/T2975 Steel and Steel Products--Location and Preparation of Test Pieces for Mechanical Testing (GB/T 2975—1998, eqv ISO 377: 1997)
GB/T4334.1 Method of 10 Percent Oxalic Acid Etch Test for Stainless Steels
GB/T4334.2 Method of Ferric Sulfate-sulfuric Acid Test for Stainless Steels
GB/T4334.3 Method of 65 Percent Nitric Acid Test for Stainless Steels
GB/T4334.5 Method of Copper Sulfate-sulfuric Acid Test for Stainless Steels
GB/T4340.1 Metallic Materials--Vickers Hardness Test--Part 1: Test Method (GB/T 4340.1—1999, eqv ISO 6507-1: 1997)
GB/T6394 Metal-methods for Estimating the Average Grain Size
GB/T6401—1986 Micrographic Method for Determining Area Fraction of the Alpha-phases Using Charts in Ferritic-austenitic Stainless Steels
GB/T7736 Ultrasonic Inspecting Method for Macro-structure and Imperfection of Steel
GB/T9971—2004 Pure Iron for Raw Material
GB/T10121 Steel products-Method for Magnetic Particle Inspection of Tower Sample
GB/T10561 Steel Determination of Content of Nonmetallic Inclusions—Micrographic Method Using Standards Diagrams (GB/T 10561—2005, ISO 4967: 1998, IDT)
GB/T11170 Method for Photoelectric Emission Spectroscopic Analysis of Stainless Steel
GB/T13305—1991 Austenitic Stainless Steels—Determination of Area Content of the α-phase—Micrographic Method Using Standard Diagrams
GB/T15574 Steel Products Classification and Definitions (GB/T15574—1995, eqv ISO 6929: 1987)
GB/T15711 Steel Products—Method for Ecth Test of Tower Sample
GB/T16761—1997 Dimensions, Shape, Weight and Tolerances for Forged Flats
GB/T17505 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 20878 Stainless and Heat-resisting Steels—Designation and Chemical Composition
YB/T 5293 Metallic Materials-Forging Test
3 Terminology and definitions
Terminology and definitions established in standard GB/T 20878 and standard GB/T 15574 are applicable to this standard.