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GB/T 223.82-2007 PDF in English


GB/T 223.82-2007 (GB/T223.82-2007, GBT 223.82-2007, GBT223.82-2007)
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GB/T 223.82-2007English70 Add to Cart 0-9 seconds. Auto-delivery. Steel and iron -- Determination of hydrogen content -- Inert gas impulse fusion heat conductivity method Obsolete
GB/T 223.82-2018English135 Add to Cart 0-9 seconds. Auto-delivery. Steel and iron -- Determination of hydrogen content -- Thermal conductivity/infrared method after fusion under inert gas Valid
Newer version: GB/T 223.82-2018
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GB/T 223.82-2007: PDF in English (GBT 223.82-2007)

GB/T 223.82-2007
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.080.01
H 11
Steel and Iron – Determination of Hydrogen Content –
Inert Gas Impulse Fusion Heat Conductivity Method
ISSUED ON. SEPTEMBER 11, 2007
IMPLEMENTED ON. FEBRUARY 1, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Principles ... 4
4 Reagents and Materials ... 5
5 Apparatus ... 5
6 Sampling and Sample Preparation ... 6
7 Calibration ... 6
8 Measurement ... 7
9 Result Calculation ... 7
10 Precision ... 8
11 Test Report ... 8
Appendix A (Informative) Original Data of Precision Test for Determination of
Hydrogen in Steel and Iron by Inert Gas Impulse Fusion Heat Conductivity
Method ... 9
Foreword
Appendix A in this Part of GB/T 223 is informative.
This Part was proposed by China Iron and Steel Industry Association.
This Part shall be under the jurisdiction of National Technical Committee for
Standardization of Steel.
Drafting organization of this Part. Institute of Metal Research of Chinese Academy of
Science.
Chief drafting staffs of this Part. Zhu Yuejin, Jiang Zhimin, and Li Sujuan.
Steel and Iron – Determination of Hydrogen Content –
Inert Gas Impulse Fusion Heat Conductivity Method
1 Scope
This Part of GB/T 223 specifies using inert gas impulse fusion heat conductivity method
to determine the hydrogen content in the steel and iron.
This method is applicable to determination of hydrogen content with mass fraction of
0.20 µg/g~30.0 µg/g in the steel and iron.
2 Normative References
The provisions in following documents become the provisions of this Part of GB/T 223
through reference in this Part. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
GB/T 6379.1 Accuracy (Trueness and Precision) of Measurement Methods and
Results - Part 1. General Principles and Definitions (GB/T 6379.1-2004, ISO 5725-
1.1994, IDT)
GB/T 6379.2 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 6379.2-2004, ISO
5725-2.1994, IDT)
GB/T 14265 Rule of Chemical Analysis for Hydrogen, Oxygen, Nitrogen, Carbon
and Sulfur in Metals Materials
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the
Determination of Chemical Composition (GB/T 20066-2006, ISO 14284. 1996, IDT)
3 Principles
Place the prepared test materials into the sampling port, put into the degasses graphite
crucible; fuse in the flowing inert gas at high temperature; the precipitated hydrogen is
The used apparatus must be calibrated regularly; in case one of the following abnormal
circumstances, the apparatus must be re-calibrated, so that ensure the reliability and
effectiveness of the measurement.
1) Apparatus is contaminated by poisoning, when do any samples or standard
samples, it always drags a tail; after remove the contamination to calibrate;
2) Emergent failure influencing the analytical results appear, after eliminating the
failure to calibrate;
3) After major parameters are changed, calibrate the apparatus.
7.2 Calibration procedures
Prepare minimum four paralleling hydrogen standard substance/standard sample in
steel with appropriate dimensions and mass at 0.5g~2.5g, its hydrogen content is close
to or slightly greater than that in the unknown sample. Measure each standard sample
at least twice as per the Measurement (8), then calibrate the apparatus as per the
average value of measurement. Use the third or fourth standard sample to check the
calibration state. If the two measurement results are not out-of-tolerance, then the
calibration is thought effective. Otherwise, re-calibrate the apparatus.
8 Measurement
8.1 Analytical procedures
Set the apparatus in the operating state; prepare the sample as per Clause 6, the
sample mass is at 0.5g~2.5g, weigh, input the sample amount; put the sample into the
sample-loading appliance. Start the analysis cycle according to the operation
instructions of apparatus, finish each complete analysis process.
8.2 Analytical conditions (recommended)
1) Degassing power 3000W or current 850A;
2) Analyzing power 2500W or current 700A;
3) Analyzing time 90s.
9 Result Calculation
The hydrogen content shall be calculated by mass fraction in µg/g.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.