GB/T 1221-2007
Heat-resistant steel bars (English Version)

Standard No.

GB/T 1221-2007

Language

Chinese, Available in English version

Release Date

2007

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 1221-2007

Replace

GB/T 1221-1992

Scope

This standard specifies the size, shape, technical requirements, test methods, acceptance rules, packaging marks and quality certificates of heat-resistant steel bars (the general term for round steel, square steel, flat steel and hexagonal steel, hereinafter referred to as steel bars). . This standard applies to hot-rolled and forged steel bars whose size (diameter, side length, thickness or distance across sides, hereinafter referred to as size) is not more than 250mm or cold-worked steel bars whose size is not more than 120mm. After negotiation between the supplier and the buyer, hot-rolled and forged steel bars with a size greater than 250mm, or cold-processed steel bars with a size greater than 120mm can also be supplied.

GB/T 1221-2007 Referenced Document

• GB/T 222 Permissible tolerances for chemical composition of steel products
• GB/T 223.11 Determination of chromium content in iron, steel and alloy by visual titration or potentiometric titration*， 2009-05-01 Update
• 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 cupper content
• GB/T 223.23 Iron,,steel and alloy.Determination of nickel content.The dimethylglyoxime spectrophotometric method*， 2008-05-13 Update
• 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*， 2008-05-13 Update
• 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 223.3 Methods for chemical analysis of iron, steel and alloy--The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus content
• GB/T 223.36 Methods for chemical analysis of iron, steel and alloy. The neutral titration method for the determinaion of nitrogen content after distillation separation
• GB/T 223.37 Iron, steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotometric method after distillation separation*， 2020-06-02 Update
• GB/T 223.4 Alloyed steel.Determination of manganese content.Potentiometric or visual titration method*， 2008-05-30 Update
• GB/T 223.40 Iron, steel and alloy Determination of niobium content by the sulphochlorophenol S spectrophotometric method
• GB/T 223.43 Iron,steel and alloy.Determination of tungsten content.Gravimetric method and spectrophotometric method*， 2008-05-13 Update
• GB/T 223.5 Steel and iron.Determination of acid-soluble silicon and total silicon content.Reduced molybdosilicate spectrophotometric method*， 2008-08-19 Update
• 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 spectrophotometic method and antimony phosphomolybdate blue spectruophotometric method*， 2008-08-19 Update
• 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 223.8 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 Iron,steel and alloy.Determination of aluminium content.Chrome azurol S photometric method*， 2008-05-13 Update

GB/T 1221-2007 history

• 2007 GB/T 1221-2007 Heat-resistant steel bars
• 1992 GB/T 1221-1992 Heat-resisting steel bars