ISO 629:1982
(Main)Steel and cast iron - Determination of manganese content - Spectrophotometric method
Steel and cast iron - Determination of manganese content - Spectrophotometric method
The method is applicable to products having manganese contents between 0,001 and 4 % (m/m). Gives principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Aciers et fontes — Dosage du manganèse — Méthode spectrophotométrique
General Information
- Status
- Published
- Publication Date
- 31-Oct-1982
- Technical Committee
- ISO/TC 17/SC 1 - Methods of determination of chemical composition
- Drafting Committee
- ISO/TC 17/SC 1 - Methods of determination of chemical composition
- Current Stage
- 9092 - International Standard to be revised
- Start Date
- 18-Sep-2024
- Completion Date
- 13-Dec-2025
Relations
- Revised
ISO/FDIS 629 - Steel and cast iron — Determination of manganese content — Spectrophotometric method - Effective Date
- 21-Sep-2024
Overview
ISO 629:1982 specifies a spectrophotometric method for the determination of manganese content in steel and cast iron. This internationally recognized standard covers the analysis of manganese in products with concentrations ranging from 0.001% to 4% by mass (m/m). Developed by ISO Technical Committee ISO/TC 17 (Steel), the method details the principles, reagents, apparatus, sampling procedures, and reporting requirements necessary for precise and reproducible manganese measurement.
This standard plays a crucial role in quality control, material certification, and metallurgical analysis by providing a reliable and validated procedure for chemical analysis of manganese, a key alloying element influencing steel and cast iron properties.
Key Topics
Scope and Applicability: Applicable to steel and cast iron products containing manganese between 0.001% and 4% by mass.
Principle of Method:
- Sample dissolution using a sulphuric/phosphoric acid mixture and nitric acid.
- Oxidation and formation of permanganate ions via treatment with sodium periodate.
- Measurement of absorbance at approximately 545 nm using a spectrophotometer.
Reagents and Solutions:
- High-purity reagents such as perchloric acid, sulphuric/phosphoric acid mixture, sodium periodate, and standard manganese solutions.
- Preparation of standard stock and working solutions for calibration.
Sampling Protocols:
- Sampling in line with ISO 37712 to ensure representative and consistent test portions.
Analytical Procedure:
- Test solution preparation involving precise weighing of test portions, acid digestion, oxidation, and dilution.
- Formation of colored compound with sodium periodate for spectrophotometric analysis.
- Use of compensation solution for baseline correction.
- Calibration using known manganese standards to construct a calibration curve or calculate the angular coefficient for absorbance.
Data Expression and Calculation:
- Calculation of manganese content expressed as a percentage by mass using a formula integrating absorbance, calibration slope, sample volume, pathlength, and test portion mass.
Test Reporting:
- Inclusion of method reference, numerical results with units, any deviations or observations, and indication of optional or modified operations.
Applications
ISO 629:1982 serves as a fundamental tool for industries and laboratories involved in:
- Metallurgical quality control to verify manganese content in steel and cast iron ensuring material meets required specifications.
- Research and development in alloy design, helping metallurgists understand and optimize manganese’s effect on mechanical and chemical properties.
- Certification and compliance testing during production or import/export inspections to ensure adherence to international standards.
- Spectrophotometric chemical analysis training, providing a standardized procedure for educational or technical training environments.
By following this method, organizations can achieve consistent manganese quantification, which is critical for controlling corrosion resistance, strength, and other performance attributes influenced by manganese.
Related Standards
ISO 37712: Deals with selection and preparation of samples and test pieces for chemical analysis of steel, referenced for sampling methodology in ISO 629.
Other chemical analysis standards related to metals may complement ISO 629 by covering different elements or alternative methods such as atomic absorption or X-ray fluorescence.
Keywords: ISO 629, manganese determination, spectrophotometric method, steel analysis, cast iron testing, manganese content measurement, chemical analysis standard, ISO/TC 17, spectrophotometry, metallurgical testing, manganese in steel, manganese in cast iron.
ISO 629:1982 - Steel and cast iron -- Determination of manganese content -- Spectrophotometric method
ISO 629:1982 - Aciers et fontes -- Dosage du manganese -- Méthode spectrophotométrique
Frequently Asked Questions
ISO 629:1982 is a standard published by the International Organization for Standardization (ISO). Its full title is "Steel and cast iron - Determination of manganese content - Spectrophotometric method". This standard covers: The method is applicable to products having manganese contents between 0,001 and 4 % (m/m). Gives principle, reagents, apparatus, sampling, procedure, expression of results and test report.
The method is applicable to products having manganese contents between 0,001 and 4 % (m/m). Gives principle, reagents, apparatus, sampling, procedure, expression of results and test report.
ISO 629:1982 is classified under the following ICS (International Classification for Standards) categories: 77.080.01 - Ferrous metals in general. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 629:1982 has the following relationships with other standards: It is inter standard links to ISO/FDIS 629. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 629:1982 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATlONWlEIKJYHAPO~HAR OPrAHH3A~Hk fl0 CTAH~APTbl3ALWl~RGANlSATlON INTERNATIONALE DE NORMALISATION
- Determination of manganese
Steel and cast iron
content - Spectrophotometric method
M&hode spectropho tombrique
Aciers et fontes - Dosage du mangantke -
First edition - 1982-11-15
UDC 669.13/.14 : 543.42 : 546.711 Ref. No. IS0 629-1982 (E)
Descriptors : steels, cast iron, chemical analysis, determination of content, spectrophotometric analysis.
Price based on 4 pages
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards institutes (IS0 member bodies). The work of developing lnter-
national Standards is carried out through IS0 technical committees. Every member
body interested in a subject for which a technical committee has been set up has the
right to be represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council.
International Standard IS0 629 was developed by Technical Committee ISO/TC 17,
Steel.
It was submitted directly to the IS0 Council, in accordance with clause 5.10.1 of part 1
of the Directives for the technical work of ISO. It cancels and replaces IS0
Recommendation R 629-1967, which had been approved by the member bodies of the
following countries :
Australia Hungary South Africa, Rep. of
Austria India
Spain
Belgium Israel Sweden
Brazil
Italy Switzerland
Canada Japan
Turkey
Chile Korea, Rep. of United Kingdom
Netherlands
Czechoslovakia USA
Denmark New Zealand USSR
Egypt, Arab Rep. of Norway Yugoslavia
France Poland
Germany, F. R. Romania
country had expressed
The member body of the followin disapproval of the docu-
g
men t on technical grounds :
Portugal
0 International Organization for Standardization, 1982
Printed in Switzerland
IS0 629-1982 (E)
INTERNATIONAL STANDARD
Steel and cast iron - Determination of manganese
content
- Spectrophotometric method
1 Scope and field of application
4.5 Perchloric acid, Q about 1,67 g/ml.
This International Standard specifies a spectrophotometric
NOTE - It is also possible to use perchloric acid, Q about 1,54 g/ml.
method for the determination of manganese in steel and cast 127 ml of perchloric acid, Q about 1,54 g/ml is equivalent to 100 ml of
perchloric acid, about 1,67 g/ml.
iron,
The method is applicable to products having manganese con-
4.6 Perchloric acid, diluted 1 + 499.
tents between 0,001 and 4 % (m/m).
4.7 Sulphuric/phosphoric acid mixture.
2 Reference
To 600 ml of water add in the following order, carefully and stir-
ring at the same time, 100 ml of sulphuric acid (Q about 1,83
IS0 37712, Selection and preparation of samples and test
g/ml) and 150 ml of phosphoric acid (Q about 1,71 g/ml). Cool
pieces of wrought steels - Part 2 : Samples and test pieces in-
and dilute to 1 000 ml with water.
tended for the determination of the chemical composition. 1)
4.8 Sodium periodate, 50 g/l solution.
3 Principle
4;9 Manganese, standard solution
Dissolution of a test portion in sulphuric-phosphoric acid mix-
ture and nitric acid. Treatment of the test solution with per-
4.9.1 Stock solution
chloric acid. Formation of the permanganate ion by sodium
periodate.
Weigh, to the nearest 0,001 g, 2,877 g of potassium per-
manganate, dissolve in 500 ml of water and add 10 ml sulphuric
Spectrophotometric measurement of the test solution at
acid (Q about 183 g/ml). Decolorize the solution with hydrogen
wavelength of about 545 nm.
peroxide [about 30 % b-n/m)1 or with a stream of sulphur
dioxide. In the latter case, eliminate the excess of reagent by
boiling.
4 Reagents
After cooling, transfer the solution to a 1 000 ml one-mark
During the analysis, unless otherwise stated, use only reagents
volumetric flask, dilute to the mark with water and mix.
of recognized analytical grade and only distilled water or water
of equivalent purity.
1 ml of this stock solution contains 1,00 mg of Mn.
NOTE - Verify by blank tests that relevant reagents are free from
manganese. Wherever necessary, the results should be corrected ac-
4.9.2 Standard solution A.
cordingly.
Transfer 100 ml of the stock solution (4.9.1) to a 1 000 ml one-
mark volumetric flask and dilute to the mark with water and
4.1 Water, free from organic matter.
mix.
Bring to the boil water acidified with 10 ml/l of sulphuric acid
1 ml of standard solution A contains 0,l mg of Mn.
(Q about I,83 g/ml), add several crystals of sodium periodate
(NalO,) and keep boiling for 10 min.
4.9.3 Standard solution B.
4.2 Pure iron, free from manganese.
Transfer 250 ml of the standard solution A (4.9.2) to a 1 000 ml
one-mark volumetric flask, dilute to the mark with water and
4.3 Hydrochloric acid, Q about 1,19 g/ml.
mix.
4.4 Nitric acid, Q about 1,40 g/ml.
1 ml of standard solution B contains 0,025 mg of Mn.
1) At present at the stage of draft. (Partial revision of ISO/R 377-1964.)
IS0 6294982 (E)
5 Apparatus
ambient temperature . Transfer into al 00 ml volumetric flask,
dilute to the mark wi th water (4.1) and mix.
Ordinary laboratory apparatus and
7.2.3 Preparation of the compensation solution
5.1 Spectrophotometer.
Take the same volumes of solution S,, water and
sulphuriclphosphoric acid mixture (4.7) as for the formation of
6 Sampling
the coloured compound for the test portion (7.2.2). Add 2 or 3
drops of the hydrochloric acid (4.3) and boil for several
Sampling shall be carried out in accordance with IS0 37712 or
minutes.
appropriate national standards for cast iron.
After cooling , transfer i nto a 1 00 ml one- mark vol umet ric flask,
dilute to the mark with water and mix.
7 Procedure
WARNING : Perchloric acid vapour may cause ex-
7.2.4 Spectrophotometric measurement
plosions in the presence of ammonia, nitrous fumes or
organic material in general.
Carry out the spectrophotometric measurements on the test
solution (7.2.21, using the spectrophotometer (5.1) at a
after having adjusted the in-
wavelength about 545 nm,
7.1 Test portion
strument to zero absorbance against the compensation
solution (7.2.3).
the presumed manganese content, weigh, to the
According to
nearest 0,001 g, the following mass (m) of the test portion :
7.2.5 Establishment of calibration curve
a) for Mn contents less than 0,05 % (m/m) : m
approx-
imately
2 g;
7.2.5.1
...
Norme internationale 629
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME)((CZYHAPO~HAR OPrAHHBAUHR nO CTAHnAPTH3ALLYIH.ORGANlSATlON INTERNATIONALE DE NORMALISATION
Aciers et fontes - Dosage du manganèse - Méthode
spectrophotométrique
Steel and cast iron - Determination of manganese content - Spectrophotometric method
Premiere 6dition - 1982-11-15
Rbf. no : IS0 629-1982 (FI
CDU 669.13/.14 : 543.42 : 546.711
B
-
Descripteurs : acier, fonte m6tallique, analyse chimique, dosage, manganhse, methode spectrophotom6trique.
d
O
Prix bas6 sur 4 pages
v,
Avant- propos
L’ISO (Organisation internationale de normalisation) est une federation mondiale
d‘organismes nationaux de normalisation (comitBs membres de I’ISO). L’Blaboration
des Normes internationales est confiBe aux comités techniques de I’ISO. Chaque
cornit6 membre int6ressB par une Btude a le droit de faire partie du comitB technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I‘ISO, participent Bgalement aux travaux.
Les projets de Normes internationales adoptes par les comitBs techniques sont soumis
aux comites membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale IS0 629 a BtB BlaborBe par le comitB technique ISO/TC 17,
Acier.
Elle fut soumise directement au Conseil de I’ISO, conformement au paragraphe 5.10.1
de la partie 1 des Directives pour les travaux techniques de I’ISO. Elle annule et rem-
place la Recommandation ISO/R 629-1967, qui avait BtB approuvBe par les comités
membres des pays suivants :
Afrique du Sud, Rep. d’ Espagne Roumanie
France Royaume-Uni
Allemagne, R. F.
Australie Hongrie Suede
Autriche Inde Suisse
Belgique Israël TchBcoslovaq u ie
BrBsil Italie Turquie
Canada Japon URSS
Nouvelle-Zélande
Chili USA
CorBe, RBp. de Norvege Yougoslavie
Danemark Pays-Bas
Pologne
Égypte, RBp. arabe d’
Le cornite membre du pays suivant l’avait dBsapprouvBe pour des raisons techniques :
Portugal
0 Organisation internationale de normalisation, 1982 O
Imprime en Suisse
NORME INTERNATIONALE IS0 629-1982 (F)
Aciers et fontes - Dosage du manganèse - Méthode
spectrop hotornétrique
1 Objet et domaine d‘application
4.5 Acide perchlorique, e 1,67 g/ml environ.
La présente Norme internationale spécifie une méthode spec-
NOTE - Il est Bgalement possible d’employer l‘acide perchlorique
trophotomBtrique de dosage du manganèse dans les aciers et p 1.54 g/ml environ. 100 ml d‘acide perchlorique p 1,67 g/ml environ
équivalent B 127 ml d’acide perchlorique Q 1,54 g/ml environ.
les fontes.
La méthode est applicable aux teneurs en manganèse compri-
4.6 Acide perchlorique, dilué 1 + 499.
ses entre 0,Ol et 4 % (m/m).
4.7 MBlange d‘acide sulfo-phosphorique.
2 Référence
Ajouter dans l’ordre suivant, A 600 ml d‘eau, avec précaution et
en agitant, 100 ml d’acide sulfurique (e 1,83 g/ml environ) et
IS0 377/2, Prklkvement et pr6paration des dchantillons et des
150 ml d‘acide phosphorique (e 1,71 g/ml environ). Refroidir et
6prouvettes en acier corroyk - Partie2 : Échantiltons et kprou-
B 1 O00 ml avec de l‘eau.
diluer
vertes destin& B la dktermination de la composition chimique. 1)
4.8 Solution de periodate de sodium, 50 g/l.
3 Principe
4.9 ManganBse, solution Btalon.
Mise en solution d‘une prise d‘essai dans un mélange sulfo-
phosphorique et d’acide nitrique. Traitement de la solution
4.9.1 Solution mhe.
d’essai avec l‘acide perchlorique. Formation d‘un ion perman-
ganate par le periodate de sodium.
Peser, B 0,001 g près, 2,877 g de permanganate de potassium,
dissoudre dans 500 ml d’eau et ajouter 10 ml d’acide sulfurique
Mesurage spectrophotométrique de la solution d’essai B une
(e 1,83 g/ml environ). Décolorer la solution par du peroxyde
longueur d’onde voisine de 545 nm.
d’hydrogène [30 % (m/m) environ1 ou un courant de dioxyde
de soufre. Dans ce dernier cas, éliminer par ébullition l’excès de
réactif.
4 Réactifs
Après refroidissement, transvaser la solution dans une fiole jau-
gée de 1 O00 ml, diluer au volume avec de l‘eau et homogénéi-
Au cours de l’analyse, sauf avis contraire, utiliser uniquement
ser.
des réactifs de purete analytique reconnue et de l’eau distillBe
ou de l’eau de pureté Bquivalente.
1 ml de solution mere contient 1,00 mg de Mn.
NOTE - VBrifier par des essais B blanc que les réactifs sont exempts de
mangankse. Si nbcessaire, les rbsultats seront corriges en cons& 4.9.2 Solution Btalon A.
quence.
Introduire 100 ml de la solution mère de mangantse (4.9.1)
dans une fiole jaugée de 1 000 ml, diluer au volume avec de
Eau, exempte de matières organiques.
4.1
l‘eau et homogénéiser.
Porter A ébullition l’eau acidifiée avec 10 ml/l d’acide sulfurique
1 ml de solution étalon A contient 0,l mg de Mn.
(e 1,83 g/ml environ), ajouter quelques cristaux de periodate
de sodium (Na104) et maintenir B I’ébullition pendant 10 min.
4.9.3 Solution Btalon B.
Fer pur, exempt de manganèse.
4.2
Introduire 250 ml de la solution Btalon A (4.9.2) dans une fiole
jaugée de 1 000 ml, diluer au volume avec de l’eau et homogé-
Acide chlorhydrique, e 1,19 g/ml environ.
4.3
néiser.
1 ml de solution étalon B contient 0,025 mg de Mn.
Acide nitrique, e 1,40 g/ml environ.
4.4
Actuellement au stade de projet. (RBvision partielle de I’ISO/R 377-1964.)
1)
-
IS0 629-1982 (FI
5 Appareillage
7.2.2 Formation du compose colore pour la prise d’essai
Matériel courant de laboratoire, et Introduire dans une fiole conique de 250 ml, selon la teneur pré-
sumée en manganese, les quantités de solution SI et de réactifs
indiquées dans le tableau 1.
5.1 Spectrophotom&tre.
Porter 8 ébullition, ajouter 10 ml de solution de periodate de
sodium (4.81, faire bouillir pendant 2 min et maintenir 8 90 OC
pendant 10 min. Faire refroidir 8 la température ambiante.
Transvaser dans une fiole jaugée de 100 ml, et diluer au volume
6 Échantillonnage
avec de l’eau (4.1) et homogénéiser.
Suivant I’ISO 37712 ou les normes nationales appropriées rela-
tives aux fontes. 7.2.3 Preparation de la solution de compensation
Prélever le même volume de solution S,, de l’eau et de mélange
d’acide sulfo-phosphorique (4.7) que pour la formation du com-
posé coloré pour la prise d’essai (7.2.2). Ajouter 2 ou 3 gouttes
7 Mode operatoire
d’acide chlorhydrique (4.3) et porter 8 ébullition pendant quel-
ques minutes.
AVERTISSEMENT : Les vapeurs d‘acide perchlorique
peuvent produire des explosions en presence d‘ammo-
Apres refroidissement, transvaser dans une fiole jaugée de
niac, de vapeurs nitreuses ou de matieres organiques en
100 ml, diluer au volume avec de l’eau et homogénéiser.
general.
7.2.4 Mesurages spectrophotometriques
7.1 Prise d‘essai
Effectuer les mesurages spectrophotométriques de la solution
En fonction de la teneur présumée en manganese, peser 8
d’essai (7.2.21, en employant le spectrophotombtre (5.1) 8 une
0,001 g près, les masses de la prise d’essai, m, indiquées
longueur d’onde voisine de 545 nm, apres avoi
...
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