GB/T 223.6-2025 Active National standards

GB/T 223.6-2025 Iron,steel and alloy—Determination of boron content—Neutralization titrimetric method and spectrophotometric method

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 223.6-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Analysis methods for steel and iron alloys

ICS Name: Black metal comprehensive

Publish Date: 2025-08-29

Implement Date: 2026-03-01

Pages: 28 pages

Scope

This document describes the methods for determining the boron content in steel and alloys using neutralization titration and curcumin spectrophotometry.
The scope of application of the methods in this document is as follows: - Method 1: Neutralization titration is suitable for determining the boron content of 0.50% to 2.00% in high-boron stainless steel. - Method 2: Methanol distillation-curcumin spectrophotometry is suitable for determining the boron content of 0.0005% to 0.20% in carbon steel, alloy steel, high-temperature alloys, and precision alloys. - Method 3: Direct curcumin spectrophotometry is suitable for determining the boron content of 0.0005% to 0.012% in steel and 0.0001% to 0.0125% in non-alloy steel.

Development Information

Word Count: 41 Thousand words Pages: 28 pages

Same series standard

GB/T 223.8-2025 Iron,steel and alloy—Determination of aluminium content—Titrimetric method and spectrophotometric method GB/T 223.11-2025 Iron, steel and alloy—Determination of chromium content—Titrimetric method and spectrophotometric method GB/T 223.13-2025 Iron,steel and alloy—Determination of vanadium content—Titrimetric method and spectrophotometric method

Replace the following standards

GB/T 223.6-1994 Methods for chemical analysis of iron, steel and alloy—The neutralization titrimetric method for the determination of boron content GB/T 223.75-2008 Iron,steel and alloy—Determination of boron content—Methanol distillation-curcumin photometric method GB/T 223.78-2000 Methods for chemical analysis of iron,steel and alloy—Curcumin spectrophotometric method for the determination of boron content

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 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 7729-2021 Chemical analysis of metallurgical products—General rule for spectrophotometric methods GB/T 20066-2006 Steel and iron—Sampling and preparation of samples for the determination of chemical composition ISO 385-1 ISO 648 ISO 1042 ISO 3696 ISO 5725-1 ISO 5725-2 ISO 5725-3 ISO 14284

Adopt standards

ISO 10153:1997

Related Standards

GB/T 17616-1998 Replaced

GB/T 17616-1998 Unified numbering system for designations of iron,steel and alloy

Publish Date: 1998-12-14

GB/T 5686.4-1998 Replaced

GB/T 5686.4-1998 Methods for chemical analysis of silicomanganese—The phosphomolybdenum blue phtometric method for the determination of phosphorus content

Publish Date: 1998-12-14

GB/T 18255-2000 Replaced

GB/T 18255-2000 Coking viscous oil products—Determination of distillation range

Publish Date: 2000-11-17

GB/T 4223-2004 Replaced

GB/T 4223-2004 Iron and steel scraps

Publish Date: 2004-05-20

GB/T 20066-2006 Active

GB/T 20066-2006 Steel and iron—Sampling and preparation of samples for the determination of chemical composition

Publish Date: 2006-02-05

GB/T 11261-2006 Active

GB/T 11261-2006 Steel and iron—Determination of oxygen content—The pulse heating inert gas fusion-infra-red absorption method

Publish Date: 2006-03-02