GB/T 12773-2021
Valve steel and superalloy bars for internal combustion engines (English Version)

Standard No.

GB/T 12773-2021

Language

Chinese, Available in English version

Release Date

2021

Published By

国家市场监督管理总局、中国国家标准化管理委员会

Latest

GB/T 12773-2021

Replace

GB/T 12773-2008

Scope

This document specifies the definition and terminology, classification, order content, size, shape and weight, technical requirements, test methods, inspection rules, packaging, marks and quality certificates of steel and alloys for internal combustion engine valves. This document is applicable to the manufacture of hot-rolled and forged bars with a diameter not greater than 120 mm and cold-drawn steel, silver bright steel, alloy bars and wire rods with a diameter not greater than 35 mm for the manufacture of gas valves for internal combustion engines.

GB/T 12773-2021 Referenced Document

• GB/T 10561 Standard grading chart microscopic examination method for determination of non-metallic inclusion content in steel*， 2023-05-23 Update
• GB/T 11170 Stainless steel .Determination of multi-element contents.Spark discharge atomic emission spectrometric method (Routine method)
• GB/T 14981-2009 Dimension,shape,mass and tolerance for hot-rolled round wire rod
• GB/T 14999.2 Test methods for superalloys.Part 2:Verification of transverse macro-structures and defect by etch
• GB/T 1979 Standard diagrams for macrostructure and defect of structural steels
• GB/T 20066 Steel and iron.Sampling and preparation of samples for the determination of chemical composition
• 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 2101 General requirment of acceptance, packaging, marking and certification for section steel
• 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
• 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 223.19 Methods for chemical analysis of iron,steel and alloy--The neocuproine-chloroform extraction photometric method for the determination of copper content
• GB/T 223.22 Methods for chemical analysis of iron ,steel and alloy.The nitroso-R-salt spectrophotometric method for the determination of cobalt 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 223.28 Methods for chemical analysis of iron,steel and alloy--The α-benzoinoxime gravimetric method for the determination of molybdenum 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 223.40 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
• 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 tarth 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 223.64 Iron,steel and alloy.Determination of manganese content.Flame atomic absorption spectrometric method
• GB/T 223.67 Iron,steel and alloy.Determination of sulfur content.Methylene blue spectrophotometric method
• GB/T 223.69 Iron,steel and alloy.Determination of carbon contents.Gas-volumetric method after combustion in the pipe furnace
• GB/T 223.70 Iron,steel and alloy.Determination of iron contents. o-Phenanthroline spectrophotometric method
• GB/T 223.75 Iron,steel and alloy.Determination of boron content. Methanol distillation-curcumin photometric 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 223.86 Steel and iron.Determination of total carbon content.Infrared absorption method after combustion in an induction furnace
• GB/T 226 Test method for macrostructure and defect of steel by etching
• GB/T 228.1-2010 Metallic materials.Tensile testing.Part 1: Method of test at room temperature
• GB/T 230.1 Metallic materials.Rockwell hardness test.Part 1:Test method
• GB/T 231.1 Metallic materials—Brinell hardness test—Part 1: Test method
• GB/T 25829 Permissible variations for chemical composition of superalloy products
• GB/T 2975 Steel and steel products.Location and preparation of samples and test pieces for mechanical testing
• GB/T 3207-2008 Bright steel
• GB/T 6394 Determination of estimating the average grain size of metal
• GB/T 702-2017 Hot-rolled steel bars—Dimensions,shape,weight and tolerances
• GB/T 905-1994 Dimension, shape, weight and tolerance for cold-drawn round, square and hexagonal steels
• GB/T 908-2019 Forged bars for dimensions,shape,weight and tolerances
• ISO 10700:1994 Steel and iron - Determination of manganese content - Flame atomic absorption spectrometric method
• ISO 10701:1994 Steel and iron; determination of sulfur content; methylene blue spectrophotometric method
• ISO 15351:1999 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (Routine method)
• ISO 4937:1986 Steel and iron; Determination of chromium content; Potentiometric or visual titration method
• ISO 4967:1998 Steel - Determination of content of nonmetallic inclusions - Micrographic method using standard diagrams
• ISO 9556:1989 Steel and iron; determination of total carbon content; infrared absorption method after combustion in an induction furnace
• YB/T 081 Rule for rounding off of numberical values and judgement of testing values for technical standards of metallurgy
• YB/T 5293 Test methods for upsetting metal materials*， 2022-09-30 Update

GB/T 12773-2021 history

• 2021 GB/T 12773-2021 Valve steel and superalloy bars for internal combustion engines
• 2008 GB/T 12773-2008 Valve steel and superalloy bars for internal combustion engines
• 1991 GB/T 12773-1991 Valve steel bars for internal combustion engines--Technical requirements