ISO 9327-3:1999
(Main)Steel forgings and rolled or forged bars for pressure purposes - Technical delivery conditions - Part 3: Nickel steels with specified low temperature properties
Steel forgings and rolled or forged bars for pressure purposes - Technical delivery conditions - Part 3: Nickel steels with specified low temperature properties
1.1 This part of ISO 9327 applies to forgings and rolled or forged bars in thicknesses up to 50 mm manufactured from the steels listed in Table 1 and to be delivered according to the specifications given in ISO 9327-1. 1.1 This part of ISO 9327 covers the following data: a) in Table 1 the limits for the chemical composition according to the cast analysis; the tensile properties at room temperature; the indications on the usual heat treatment condition at the time of delivery; b) in Table 2 the permissible product analysis tolerances on the limiting values given for the cast analysis; c) in Table 3 the minimum impact energy values.
Pièces forgées et barres laminées ou forgées en acier pour appareils à pression — Conditions techniques de livraison — Partie 3: Aciers alliés au nickel avec caractéristiques spécifiées à basse température
1.1 La présente partie de l'ISO 9327 traite des pièces forgées et des barres forgées ou laminées dont l'épaisseur est inférieure ou égale à 50 mm fabriquées dans les aciers figurant dans le Tableau 1 et devant être livrées conformément aux spécifications données dans l'ISO 9327-1. 1.2 La présente partie de l'ISO 9327 couvre les points suivants: a) dans le Tableau 1, les limites relatives: à la composition chimique, selon l'analyse de coulée; aux caractéristiques de traction à température ambiante; aux indications concernant l'état de traitement thermique habituel à la livraison; b) dans le Tableau 2, les écarts admissibles de l'analyse sur produit par rapport aux valeurs limites spécifiées pour l'analyse de coulée; c) dans le Tableau 3, les valeurs minimales d'énergie de rupture par flexion par choc.
General Information
- Status
- Published
- Publication Date
- 07-Jul-1999
- Technical Committee
- ISO/TC 17/SC 10 - Steel for pressure purposes
- Drafting Committee
- ISO/TC 17/SC 10 - Steel for pressure purposes
- Current Stage
- 9092 - International Standard to be revised
- Start Date
- 25-Apr-2024
- Completion Date
- 13-Dec-2025
Relations
- Revises
ISO 2604-1:1975 - Steel products for pressure purposes - Quality requirements - Part 1: Forgings - Effective Date
- 15-Apr-2008
Overview
ISO 9327-3:1999 is an international standard published by the International Organization for Standardization (ISO) that specifies the technical delivery conditions for steel forgings and rolled or forged bars intended for pressure purposes. This part-Part 3-focuses on nickel-alloyed steels with specified low temperature properties. It applies to forgings and bars with thicknesses up to 50 mm manufactured from designated nickel steels, ensuring materials meet stringent mechanical and chemical composition requirements for safe and reliable performance under low-temperature conditions.
This standard is critical for manufacturers, engineers, and quality assurance professionals involved in the production and use of nickel steel components in pressure equipment, where toughness and ductility at low temperatures are essential for operational safety.
Key Topics
Scope and Applicability
Covers nickel alloy steels with controlled chemical compositions and specified mechanical properties, including tensile strength and impact energy at low temperatures. It applies to forgings and rolled or forged bars up to 50 mm in thickness.Chemical Composition Limits
Defines allowable chemical makeup based on cast analysis with precise tolerances on elements such as carbon, silicon, manganese, phosphorus, sulfur, aluminum, molybdenum, nickel, niobium, and vanadium. This ensures metallurgical consistency and compliance with performance criteria.Mechanical Properties
Specifies minimum tensile properties at room temperature and minimum impact energy values at specified low temperatures to guarantee material toughness and resistance to brittle fracture, critical for pressure equipment operating in cold environments.Heat Treatment Conditions
Details the standard heat treatment states (normalizing, tempering, quenching) for delivery, impacting the microstructure and low-temperature behavior of these nickel steels.Testing and Quality Control Requirements
Outlines testing protocols including Charpy impact tests following ISO 148 to verify impact energy, as well as sampling, inspection, and conformity criteria to certify material quality and compliance.Marking and Documentation
Requires marking of products for traceability and adherence to ordering information stipulated in ISO 9327-1, ensuring full traceability and verification throughout the supply chain.
Applications
ISO 9327-3:1999 serves as a foundational specification for industries requiring high-integrity pressure equipment components featuring nickel-alloy steels with excellent toughness at low temperatures. Key application areas include:
Oil and Gas Industry
Use in pipelines, valves, and flanges exposed to subzero environments to prevent brittle failure under pressure.Cryogenics and Refrigeration
Components subjected to very low operating temperatures requiring guaranteed impact resistance.Chemical and Petrochemical Processing
Equipment handling fluids under pressure where material toughness at varied temperatures enhances safety.Power Generation
Pressure vessels and piping in nuclear and fossil fuel plants exposed to fluctuating thermal conditions.Marine and Offshore Structures
Use in cold sea environments demanding robust material properties to resist cracking and maintain integrity.
By adhering to ISO 9327-3, manufacturers and users of nickel alloy steel forgings and bars ensure safety, reliability, and compliance with international quality benchmarks essential for critical pressure applications.
Related Standards
ISO 9327-1: General Requirements
Defines overall technical delivery conditions for steel forgings and bars intended for pressure purposes, covering ordering, inspection, and documentation protocols.ISO 9327-2: High Temperature Steels
Covers non-alloy and alloy steels with defined properties for high temperature applications, complementing the low temperature focus of Part 3.ISO 9327-4: Fine Grain High Strength Steel
Specifies requirements for weldable steels with high yield strength for pressure equipment.ISO 9327-5: Stainless Steels
Focuses on stainless steel forgings and bars for pressure purposes, providing specifications for corrosion-resistant materials.ISO 148: Charpy Impact Test
Details testing method for evaluating the impact toughness of steels, crucial for assessing low temperature performance per ISO 9327-3 requirements.ISO/TR 15461: Sampling and Testing Frequencies
Provides guidance on mechanical test frequencies and sample handling relevant to conformance verification.
Compliance with ISO 9327-3:1999, alongside these related standards, supports the production and quality assurance of nickel-alloy steel components engineered for demanding pressure applications under low temperature conditions. This ensures enhanced safety, durability, and global acceptance in critical industrial sectors.
ISO 9327-3:1999 - Steel forgings and rolled or forged bars for pressure purposes — Technical delivery conditions — Part 3: Nickel steels with specified low temperature properties Released:7/8/1999
ISO 9327-3:1999 - Pièces forgées et barres laminées ou forgées en acier pour appareils à pression — Conditions techniques de livraison — Partie 3: Aciers alliés au nickel avec caractéristiques spécifiées à basse température Released:7/8/1999
Frequently Asked Questions
ISO 9327-3:1999 is a standard published by the International Organization for Standardization (ISO). Its full title is "Steel forgings and rolled or forged bars for pressure purposes - Technical delivery conditions - Part 3: Nickel steels with specified low temperature properties". This standard covers: 1.1 This part of ISO 9327 applies to forgings and rolled or forged bars in thicknesses up to 50 mm manufactured from the steels listed in Table 1 and to be delivered according to the specifications given in ISO 9327-1. 1.1 This part of ISO 9327 covers the following data: a) in Table 1 the limits for the chemical composition according to the cast analysis; the tensile properties at room temperature; the indications on the usual heat treatment condition at the time of delivery; b) in Table 2 the permissible product analysis tolerances on the limiting values given for the cast analysis; c) in Table 3 the minimum impact energy values.
1.1 This part of ISO 9327 applies to forgings and rolled or forged bars in thicknesses up to 50 mm manufactured from the steels listed in Table 1 and to be delivered according to the specifications given in ISO 9327-1. 1.1 This part of ISO 9327 covers the following data: a) in Table 1 the limits for the chemical composition according to the cast analysis; the tensile properties at room temperature; the indications on the usual heat treatment condition at the time of delivery; b) in Table 2 the permissible product analysis tolerances on the limiting values given for the cast analysis; c) in Table 3 the minimum impact energy values.
ISO 9327-3:1999 is classified under the following ICS (International Classification for Standards) categories: 77.140.30 - Steels for pressure purposes; 77.140.85 - Iron and steel forgings. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 9327-3:1999 has the following relationships with other standards: It is inter standard links to ISO 2604-1:1975. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 9327-3:1999 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 ISO
STANDARD 9327-3
First edition
1999-06-15
Steel forgings and rolled or forged bars for
pressure purposes — Technical delivery
conditions —
Part 3:
Nickel steels with specified low temperature
properties
Pièces forgées et barres laminées ou forgées en acier pour appareils
à pression — Conditions techniques de livraison —
Partie 3: Aciers alliés au nickel avec caractéristiques spécifiées à basse
température
A
Reference number
Contents
Page
1 Scope .1
2 Normative references .2
3 Terms and definitions .2
4 Ordering and designation .2
5 Requirements.2
6 Inspection, testing and conformity of products .2
7 Marking .2
Bibliography.6
© ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
©
ISO
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established 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. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
International Standard ISO 9327-3 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 10,
Steel for pressure purposes.
This first edition, together with parts 1, 2, 4 and 5 of ISO 9327, cancels and replaces ISO 2604-1:1975.
ISO 9327 consists of the following parts, under the general title Steel forgings and rolled or forged bars for pressure
purposes — Technical delivery conditions:
Part 1: General requirements
Part 2: Non-alloy and alloy (Mo, Cr and CrMo) steels with specified elevated temperature properties
Part 3: Nickel steels with specified low temperature properties
Part 4: Weldable fine grain steels with high proof strength
Part 5: Stainless steels
iii
©
INTERNATIONAL STANDARD ISO ISO 9327-3:1999(E)
Steel forgings and rolled or forged bars for pressure purposes —
Technical delivery conditions —
Part 3:
Nickel steels with specified low temperature properties
1 Scope
1.1 This part of ISO 9327 applies to forgings and rolled or forged bars in thicknesses up to 50 mm manufactured
from the steels listed in Table 1 and to be delivered according to the specifications given in ISO 9327-1.
1.1 This part of ISO 9327 covers the follo
...
NORME ISO
INTERNATIONALE 9327-3
Première édition
1999-06-15
Pièces forgées et barres laminées
ou forgées en acier pour appareils
à pression — Conditions techniques
de livraison —
Partie 3:
Aciers alliés au nickel avec caractéristiques
spécifiées à basse température
Steel forgings and rolled or forged bars for pressure purposes —
Technical delivery conditions —
Part 3: Nickel steels with specified low temperature properties
A
Numéro de référence
Sommaire
Page
1 Domaine d’application .1
2 Références normatives .1
3 Termes et définitions.2
4 Commande et désignation.2
5 Exigences .2
6 Contrôles, essais et conformité des produits.2
7 Marquage.2
Bibliographie.6
© ISO 1999
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque
forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur.
Organisation internationale de normalisation
Case postale 56 • CH-1211 Genève 20 • Suisse
Internet iso@iso.ch
Imprimé en Suisse
ii
©
ISO ISO 9327-3:1999(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de
normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général confiée aux
comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du comité
technique créé à cet effet. Les organisations internationales, gouvernementales et non gouvernementales, en
liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec la Commission
électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI, Partie 3.
Les projets de Normes internationales adoptés par les comités techniques sont soumis aux comités membres pour
vote. Leur publication comme Normes internationales requiert l'approbation de 75 % au moins des comités
membres votants.
La Norme internationale ISO 9327-3 a été élaborée par le comité technique ISO/TC 17, Acier, sous-comité SC 10,
Aciers pour service sous pression.
Cette première édition, conjointement avec les autres parties de l'ISO 9327, remplace l'ISO 2604-1:1975.
L'ISO 9327 comprend les parties suivantes, présentées sous le titre général Pièces forgées et barres laminées ou
forgées en acier pour appareils à pression — Conditions techniques de livraison:
Partie 1: Exigences générales
Partie 2: Aciers non alliés et alliés (Mo, Cr, CrMo) avec caractéristiques spécifiées à température élevée
Partie 3: Aciers alliés au nickel avec caractéristiques spécifiées à basse température
Partie 4: Aciers soudables à grain fin à limite d'élasticité élevée
Partie 5: Aciers inoxydables
iii
©
NORME INTERNATIONALE ISO ISO 9327-3:1999(F)
Pièces forgées et barres laminées ou forgées en acier pour
appareils à pression — Conditions techniques de livraison —
Partie 3:
Aciers alliés au nickel avec caractéristiques spécifiées à basse
température
1 Domaine d’application
1.1 La présente partie de l’ISO 9327 traite des pièces forgées et des barres forgées ou laminées dont l'épaisseur
est inférieure ou égale à 50 mm fabriquées dans les aciers figurant dans le Tableau 1 et devant être livrées
conformément aux spécifications données dans l'ISO 9327-1.
1.2 La présente partie de l’ISO 9327 couvre les points suivants:
a) dans le Tableau 1, les limites relatives:
à la composition chimique, selon l'analyse de coulée;
aux caractéristiques de traction à température ambiante;
aux indications concernant l'état de traitement thermique habituel à la livraison;
b) dans le
...
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