GB/T 4699.8-2025 in English

VALID

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

Issued on:2025-08-29
Implemented on:2026-03-01
File Format:PDF
Delivery:Via email within 1~3 business days

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Standard No:	GB/T 4699.8-2025
Document status:	VALID
Title in English:	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
Title in Chinese:	铬铁、硅铬合金、氮化铬铁和高氮铬铁硅含量的测定硅钼蓝分光光度法、氟硅酸钾滴定法和高氯酸脱水重量法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2025-08-29
Implemented on:	2026-03-01
Superseding:	GB/T 5687.2-2007 Ferrochromium silicochromium and nitrogen-bearing ferrochromium—Determination of silicon content—The perchloric acid dehydration gravimetric method
ICS Classification:	77.100-Ferroalloys
Chinese Classification:	H11-Steel and iron alloy analysis method
Professional Classification:	GB-National Standard
Related Keywords:	silicon content silicomolybdenum blue spectrophotometric method silicon content high nitrogen ferrochromium determination silicon potassium fluoride perchloric acid dehydration
Related Topics:	Analysis of chromic acid content Nitrogen perchlorate Determination of Nitrogen Content by Perchloric Acid Method Determination of silicon content Cod Determination Potassium Dichromate Method Nitrogen degassing In addition to ferrosilicon Trace Iron Content in Ferric Chloride Cod Determination Potassium Dichromate Method Potassium dichromate UV photometry Cod Determination Potassium Dichromate Method Perchloric acid titer Cod Determination Potassium Dichromate Method Potassium Dichromate Oxidation UV Spectrophotometry A3 iron silicon content Chromium ferrochromium, silicon chromium alloy chemical analysis method Potentiometric titration method for determination of chromium content Photosynthetic silicon energy Potassium chromate content in water

《GB/T 4699.8-2025铬铁、硅铬合金、氮化铬铁和高氮铬铁硅含量的测定硅钼蓝分光光度法、氟硅酸钾滴定法和高氯酸脱水重量法》由TC318（全国生铁及铁合金标准化技术委员会）归口，TC318SC1（全国生铁及铁合金标准化技术委员会化学分析分会）执行，主管部门为中国钢铁工业协会。

Scope

This document specifies the determination of silicon content in ferrochrome, silicon-chromium alloy, ferrochrome nitride and high-nitrogen ferrochrome by using silicon-molybdenum blue spectrophotometry, potassium fluorosilicate titration and perchloric acid dehydration gravimetry. This document is applicable to the determination of silicon content in ferrochrome, silicon-chromium alloy, ferrochrome nitride and high-nitrogen ferrochrome. Method 1: Silicon-molybdenum blue spectrophotometry, applicable to the determination of silicon content in ferrochrome, ferrochrome nitride and high-nitrogen ferrochrome, with a measurement range (mass fraction): 0.10%~6.00%; Method 2: Potassium fluorosilicate titration, applicable to the determination of silicon content in silicon-chromium alloy, with a measurement range (mass fraction): 30.00%~50.00%; Method 3: Perchloric acid dehydration gravimetry, applicable to the determination of silicon content in ferrochrome, silicon-chromium alloy, ferrochrome nitride and high-nitrogen ferrochrome, with a measurement range (mass fraction): 0.10%~60.00%

More samples: DL/T 368-2010 GB 50021-2001(2009) JJG 21-2008

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