GB/T 21931.1-2025 Active National standards

GB/T 21931.1-2025 Ferronickel—Determination of carbon content—Infrared absorption method after induction furnace combustion

Publish Date: 2025-08-29 Implement Date: 2026-03-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 21931.1-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Analysis methods for steel and iron alloys

ICS Name: Iron alloy

Publish Date: 2025-08-29

Implement Date: 2026-03-01

Pages: 20 pages

Scope

This document specifies the determination of carbon content in nickel-iron by the infrared absorption method of combustion in an induction furnace.
This document is applicable to the determination of carbon content in nickel-iron, with a measurement range (mass fraction) of 0.001% to 2.5%.

Development Information

Word Count: 28 Thousand words Pages: 20 pages

Same series standard

GB/T 21931.2-2025 Ferronickels—Determination of sulfur content—Infrared absorption method after induction furnace combustion

Replace the following standards

GB/T 21931.1-2008 Nickel,ferronickel and nickel alloys—Determination of carbon content—Infrared absorption method after induction furnace combustion

Referenced Standards

GB/T 6379.1-2004 Accuracy(trueness and precision)of measurement methods and results—Part 1:General principles and definitions GB/T 6379.2-2004 Accuracy(trueness and precision)of measurement methods and results—Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method GB/T 6379.3-2012 Accuracy(trueness and precision)of measurement methods and results—Part 3:Intermediate measures of the precision of a standard measurement method GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 25050-2010 Ferronickel ingots or pieces—Sampling for analysis GB/T 25051-2010 Ferronickel shot—Sampling for analysis

Adopt standards

ISO 7524:2020

Related Standards

GB/T 3654.10-1983 Replaced

GB/T 3654.10-1983 Methods for chemical analysis of ferroniobium The EDTA volumetric method for the determination of aluminum content

Publish Date: 1983-05-02

GB/T 3654.1-1983 Active

GB/T 3654.1-1983 Methods for chemical analysis of ferroniobium—The paper chromatograph-gravimetric method for the determination of niobium and tantalum

Publish Date: 1983-05-02

GB/T 3654.2-1983 Replaced

GB/T 3654.2-1983 Methods for chemical analysis of ferroniobium—The neocuproine-chloroform extraction photometric method for the determination of copper content

Publish Date: 1983-05-02

GB/T 3654.3-1983 Replaced

GB/T 3654.3-1983 Methods for chemical analysis of ferroniobium The gravimetric method for the determination of silicon content

Publish Date: 1983-05-02

GB/T 3654.4-1983 Active

GB/T 3654.4-1983 Methods for chemical analysis of ferroniobium The combustion gravimetric method for the determination of carbon content

Publish Date: 1983-05-02

GB/T 3654.5-1983 Active

GB/T 3654.5-1983 Methods for chemical analysis of ferroniobium The molybdenum blue photometric method for the determination of the phosphorus comtent

Publish Date: 1983-05-02