GB/T 4699.2-2025 Active National standards

GB/T 4699.2-2025 Ferrochromium,silicochromium,nitrogen-bearing ferrochromium and high nitrogen ferrochromium—Determination of chromium content—Ammonium persulfate oxidation titrimetric method and potentiometric titration method

Publish Date: 2025-08-01 Implement Date: 2026-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 4699.2-2025

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: 2025-08-01

Implement Date: 2026-02-01

Publisher: 国家市场监督管理总局、国家标准化管理委员会

Technical Committee: 全国生铁及铁合金标准化技术委员会(SAC/TC 318)

Pages: 20 pages

Scope

本文件规定了采用过硫酸铵氧化滴定法和电位滴定法测定铬铁、硅铬合金、氮化铬铁和高氮铬铁中的铬含量。
本文件适用于铬铁、硅铬合金、氮化铬铁和高氮铬铁中铬含量的测定，测定范围（质量分数）：25.00%～80.00%。

Development Information

Drafting Units:

吉铁铁合金有限责任公司、山西太钢不锈钢股份有限公司、大漠天宇有限公司、鄂尔多斯市西金矿冶有限责任公司、青岛远诚创智科技有限公司、内蒙古新太元新材料有限公司、中信(辽宁)新材料科技股份有限公司、河北津西钢铁集团股份有限公司、冶金工业信息标准研究院

Drafting Persons:

郑海东、聂淑兰、张晓红、于兆吉、王珺、徐文高、周启朝、吴蕾、赵利欣、乌静、张晓、周瑞东、马宁、刘飞、李京霖、张莉、田凯、祁昂、孙风晓、褚衍顺、王昊、王晶、卢春生、刘艳婷、程昭阳

Word Count: 27 Thousand words Pages: 20 pages

Same series standard

GB/T 4699.8-2025 Ferrochromium,silicochromium,nitrogen-bearing ferrochromium and high nitrogen ferrochromium—Determination of silicon content—Silicomolybdenum blue spectrophotometric method,silicon potassium fluoride titrimetric method and perchloric acid dehydration gravimetric method

Replace the following standards

GB/T 4699.2-2008 Ferrochromium and ferrosilicochromium—Determination of chromium content—The ammonium persulfate oxidation titrimetric method and potentiometric titration method

Referenced Standards

GB/T 4010-1994 Ferroalloys—Sampling and preparation of samples for chemical analysis GB/T 4010-2015 Ferroallys sampling and preparation of samples for chemical analysis GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods 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 12806-1991 Laboratory glassware—One-mark volumetric flasks GB/T 12806-2011 Laboratory glassware—One-mark volumetric flasks GB/T 12807-1991 Laboratory glassware—Graduated pipettes GB/T 12807-2021 Laboratory glassware—Graduated pipettes GB/T 12808-1991 Laboratory glassware—One-mark pipettes GB/T 12808-2015 Laboratory glassware—One mark pipettes

Adopt standards

ISO 4140:1979

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