GB/T 38938-2020
High strength and low expansion alloy (English Version)

Standard No.

GB/T 38938-2020

Language

Chinese, Available in English version

Release Date

2020

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 38938-2020

Scope

This standard specifies the ordering content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of high-strength low-expansion alloys. This standard applies to high-strength low-expansion alloy rods, flat materials and plates (hereinafter referred to as alloy materials) for high-load and high-precision load-bearing components.

GB/T 38938-2020 Referenced Document

• GB/T 10592 High and low temperature test chamber technical conditions*， 2023-03-17 Update
• GB/T 11170 Stainless steel .Determination of multi-element contents.Spark discharge atomic emission spectrometric method (Routine method)
• GB/T 13298 Inspection methods of microstructure for metals
• GB/T 14985-2007 General rules of dimensions,shape,surface,quality,testing method and inspection for expansion alloys
• GB/T 15749 Measuring method in quantitative metallography
• GB/T 16839.1 Thermocouples—Part 1: EMF specifications and tolerances
• GB/T 18876.1 Standard practice for determining the metallographical constituent and inclusion content of steels and other metals by automatic image analysis-Part 1: Determining the inclusion or second-phase constituent content of steels and other metals by automatic
• 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 20125 Low-alloy steel.Determination of multi-element contents.Inductively coupled plasma atomic emission spectrometric method
• GB/T 21834 Medium and low alloy steel-Determination of the distribution of multi-element contents-Original position statistic distribution analysis method
• 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 223.20 Methods for chemical analysis of iron steel and alloy.The Potentiometric titration 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 223.5 Steel and iron.Determination of acid-soluble silicon and total silicon content.Reduced molybdosilicate spectrophotometric method
• 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 223.64 Iron,steel and alloy.Determination of manganese content.Flame atomic absorption spectrometric method
• GB/T 223.79 Iron and steel-Determination of multi-element contents-X-ray fluorescence spectrometry (Routine method)
• GB/T 223.85 Steel and iron.Determination of sulfur content.Infrared absorption method after combustion in an induction furnace
• GB/T 223.86 Steel and iron.Determination of total carbon content.Infrared absorption method after combustion in an induction furnace
• GB/T 22368 Low-alloy steel.Determination of multi-element contents.Glow discharge optical emission spectrometry(Routine method)
• GB/T 228.1 Metallic materials—Tensile testing—Part 1: Method of test at room temperature*， 2021-12-31 Update
• GB/T 230.1 Metallic materials.Rockwell hardness test.Part 1:Test method
• GB/T 2423.1 Environmental testing for electric and electronic products.Part 2:Test methods.Tests A:Cold
• GB/T 2424.5 Environmental testing—Part 3:Supporting documentation and guidance—Confirmation of the performance of temperature chambers*， 2021-05-21 Update
• GB/T 2970 Method for ultrasonic testing of thicker steel plates
• GB/T 2975 Steel and steel products.Location and preparation of samples and test pieces for mechanical testing
• GB/T 38939 Nickel-based alloy—Determination of multi-element contents—Spark discharge atomic emission spectrometric method(routine method)
• GB/T 4162-2008 Forged and rolled steel bars. Method for ultrasonic testing
• GB/T 4339 Test methods for thermal expansion characteristic parameters of metallic materials
• YB/T 4377 Electrolytic polishing method of metallic specimens
• YB/T 5242 General rules of packaging, marking and quality certification for precision alloys

GB/T 38938-2020 history

• 2020 GB/T 38938-2020 High strength and low expansion alloy