EN 10278:2023
(Main)Dimensions and tolerances of bright steel products of stainless and other special steels
Dimensions and tolerances of bright steel products of stainless and other special steels
This document applies to bright steel products in the drawn, turned or ground condition delivered in straight lengths. This document is mainly applied to stainless steels of EN 10088-3 and other product standards, e.g. tool steels, roller bearing steels.
This document can also be used for cold heading steels in the form of bars and wire; in case of wire, the thickness and tolerances apply but not the length and the straightness.
The non-alloy and alloy steels of EN 10277 are no longer included.
This document does not cover cold rolled products and cut lengths produced from strip or sheet by cutting.
Maße und Grenzabmaße von Blankstahlerzeugnissen aus nichtrostenden und anderen Stahlerzeugnissen
Dieses Dokument ist anwendbar für Blankstahlerzeugnisse in Form gerader Stäbe im gezogenen, geschälten oder geschliffenen Zustand. Dieses Dokument ist hauptsächlich anwendbar auf die nichtrostenden Stähle nach EN 10088-3 und andere Erzeugnisnormen, z. B.: Werkzeugstähle und Wälzlagerstähle.
Dieses Dokument kann auch für Kaltstauchstähle sowohl in der Form von Stäben als auch in der Form von Draht verwendet werden. Bei Drähten gelten die Dicke und die Toleranzen, nicht aber die Länge und die Geradheit.
Die unlegierten und legierten Stähle der EN 10277 sind nicht länger Bestandteil dieser Norm.
Dieses Dokument ist nicht anwendbar für kaltgewalzte Erzeugnisse und für aus Band oder Blech geschnittene Stäbe.
Dimensions et tolérances des produits en acier transformés à froid à partir d’acier inoxydable et autres aciers spéciaux
Le présent document s'applique aux aciers transformés à froid, à l'état étiré, galeté ou rectifié, livrés sous formes de barres droites. Le présent document est principalement applicable aux aciers inoxydables de l'EN 10088-3 et à d'autres normes de produits, par exemple, les aciers à outils, les aciers à roulement, etc.
Le présent document peut être également utilisé pour les aciers obtenus par frappe à froid, à la fois sous forme de barre et de fil ; dans le cas des fils, l’épaisseur et les tolérances s’appliquent mais pas la longueur ni la rectitude.
Les aciers non alliés et alliés de l'EN 10277 ne sont désormais plus couverts.
Le présent document ne couvre pas les produits laminés à froid et les longueurs produites à partir de bandes ou de tôles par découpe.
Mere in mejni odstopki mer svetlih jeklenih izdelkov iz nerjavnih in drugih posebnih jekel
Ta dokument se uporablja za svetle jeklene izdelke v vlečenem, struženem ali mletem stanju, dobavljene v ravnih odsekih. Ta dokument se zlasti uporablja za nerjavna jekla iz standarda EN 10088-3 in drugih standardov za izdelke (npr. orodna jekla, jekla za valjčne ležaje). Ta dokument je mogoče uporabiti tudi za jekla, namenjena za hladno nakrčevanje, tako v obliki palic kot žic.
Nelegirana in legirana jekla iz standarda EN 10277 niso več vključena.
Ta dokument ne zajema hladno valjanih izdelkov in rezanih dolžin iz trakov ali plošč.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2024
Mere in mejni odstopki mer svetlih jeklenih izdelkov iz nerjavnih in drugih
posebnih jekel
Dimensions and tolerances of bright steel products of stainless and other special steels
Maße und Grenzabmaße von Blankstahlerzeugnissen aus nichtrostenden und anderen
Stahlerzeugnissen
Dimensions et tolérances des produits en acier transformés à froid à partir d’acier
inoxydable et autres aciers spéciaux
Ta slovenski standard je istoveten z: EN 10278:2023
ICS:
77.140.01 Železni in jekleni izdelki na Iron and steel products in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 10278
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2023
EUROPÄISCHE NORM
ICS 77.140.60 Supersedes EN 10278:1999
English Version
Dimensions and tolerances of bright steel products of
stainless and other special steels
Dimensions et tolérances des produits en acier Maße und Grenzabmaße von Blankstahlerzeugnissen
transformés à froid à partir d'acier inoxydable et aus nichtrostenden und anderen besonderen Stählen
autres aciers spéciaux
This European Standard was approved by CEN on 25 September 2023.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10278:2023 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Information to be supplied by the purchaser . 5
4.1 Mandatory information . 5
4.2 Options . 5
4.3 Examples . 5
5 Requirements . 6
5.1 Shape, dimensions and tolerances . 6
5.2 Straightness tolerance . 6
5.3 Condition of bar ends . 6
5.4 Disposition of tolerances . 7
6 Visual and dimensional inspection . 7
Annex A (normative) Methods for evaluating straightness .13
A.1 Scope .13
A.2 Recommended method .13
A.3 Alternative method for round bars (effective for diameters ≥ 10 mm) .13
European foreword
This document (EN 10278:2023) has been prepared by Technical Committee CEN/TC 459/SC 5 “Steels
for heat treatment, alloy steels, free-cutting steels and stainless steels”, the secretariat of which is held by
DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2024, and conflicting national standards shall be
withdrawn at the latest by May 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 10278:1999.
The main changes compared to the previous edition EN 10278:1999 are listed below:
— bright steels of EN 10277 are excluded from the scope of this document and its application is
restricted to stainless steels and special steels which can be delivered as bright products, e.g. tool
steels, roller bearing steels, etc.;
— surface condition and tolerance classes revised;
— this document can now also be used for cold heading steels both in form of bars and wire (for wire
not concerning length and straightness);
— deviation from straightness revised;
— editorially revised.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
1 Scope
This document applies to bright steel products in the drawn, turned or ground condition delivered in
straight lengths. This document is mainly applied to stainless steels of EN 10088-3 and other product
standards, e.g. tool steels, roller bearing steels.
This document can also be used for cold heading steels in the form of bars and wire; in case of wire, the
thickness and tolerances apply but not the length and the straightness.
The non-alloy and alloy steels of EN 10277 are no longer included.
This document does not cover cold rolled products and cut lengths produced from strip or sheet by
cutting.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 10079, Definition of steel products
EN 10088-3, Stainless steels — Part 3: Technical delivery conditions for semi-finished products, bars, rods,
wire, sections and bright products of corrosion resisting steels for general purposes
EN 10204, Metallic products — Types of inspection documents
EN ISO 9443, Surface quality classes for hot-rolled bars and wire rod (ISO 9443)
ISO 286-2, Geometrical product specifications (GPS) — ISO code system for tolerances on linear sizes —
Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
ISO 10474, Steel and steel products — Inspection documents
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 10079 (for drawn products)
and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
thickness
nominal dimension of the product
Note 1 to entry: This means:
a) the diameter in the case of rounds;
b) the lateral length in the case of squares;
c) the width over flats in the case of hexagons;
d) the shorter lateral length in the case of flats (rectangular bars) and wide-flats.
For special sections, 'thickness' shall be specified at the time of enquiry and order.
3.2
ovality
difference between the smallest and largest dimension measured across the pairs of opposing points at a
common cross-section
3.3
out-of shape
special tolerances and their deviations from the nominal section profile
4 Information to be supplied by the purchaser
4.1 Mandatory information
The following information shall be supplied by the purchaser at the time of enquiry and order:
a) quantity (mass, number of bars) to be delivered;
b) shape of the product (e.g. round, hexagon, square, flat);
c) reference to this document, i.e. EN 10278;
d) the nominal dimensions and tolerances on dimensions and shape;
e) reference to the material standard including the number of the part (e.g. EN 10088-3);
f) steel name or steel number;
g) the finished condition (see 5.1);
h) the class of surface quality (see EN ISO 9443) where appropriate (not for EN 10088-3).
4.2 Options
Several options are specified in this document and listed below. If the purchaser does not indicate any of
these options, the products will be supplied in accordance with the basic specifications (see 4.1).
1) Straightness (see 5.2);
2) Condition of bar ends (see 5.3);
3) Disposition of tolerances (see 5.4);
4) The type of inspection document in accordance with EN 10204 or ISO 10474.
4.3 Examples
EXAMPLE 1
10t rounds EN 10278 – 50 h8 x stock 3000
EN 10088-3-X5CrNi18-10+2P
EN 10204 – 3.1
or
10t rounds EN 10278 – 50 h8 x stock 3000
EN 10088-3-1.4301+2P
EN 10204 – 3.1
EXAMPLE 2
2 t rounds EN 10278 – 20 h9 x stock 6000
EN ISO 4957-32CrMoV12-28+C
EN ISO 9443 - class B
ISO 10474 – 3.1
or
2t rounds EN 10278 – 20 h9 x stock 6000
EN ISO 4957-1.2365+C
EN ISO 9443 – class B
ISO 10474 – 3.1
5 Requirements
5.1 Shape, dimensions and tolerances
The tolerance class on thickness (and width for flats) of bright steel products shall comply to the standard
tolerance class in Table 1. If other than the standard tolerance class is requested by the purchaser, one of
the classes written in brackets in Table 1 (e.g.) can be agreed at the time of enquiry and order. The
tolerance class and the corresponding tolerances are given in Table 2 for rounds, squares and hexagons
and in Table 3 for drawn flats. Where specified by the purchaser at the time of enquiry and order, the
disposition tolerances specified in Table 2 shall be in accordance with 5.4.
Unless otherwise agreed at the time of enquiry and order, the length and the tolerance on length shall be
as specified in Table 4.
The maximum admitted ovality shall be not more than half the specified tolerance range, in any case
never above the upper limit of the tolerance. Any other requirement concerning the out of shape and its
deviations from the nominal section profile (see 3.3) may be agreed at the time of enquiry and order
together with the measurement method.
Non-round bars (i.e. square, hexagon and flat) in widths ≤ 150 mm may have an undefined profile within
a distance of 0,2 mm of the hypothetical edge (explanation: hypothetical intersections of two surfaces),
flats in widths > 150 mm within a distance of 0,5 mm, unless otherwise agreed. For widths > 150 mm,
sharp corners can be ordered.
5.2 Straightness tolerance
Where specified at the time of enquiry and order and in cases of dispute, an agreed number of bars shall
be evaluated for straightness in accordance with one of the methods specified in Annex A and the
tolerances specified in Tables 5 and 6 shall apply.
5.3 Condition of bar ends
The ends of the product (e.g. chamfering, facing) shall meet the requirements specified by the purchaser
at the time of enquiry and order.
5.4 Disposition of tolerances
The dispositions of tolerances about the nominal dimensions of the product other than specified in 5.1
shall be one of the following as specified by the purchaser at the time of enquiry and order:
a) values all positive, i.e. + and lower tolerances all zero, i.e. −0;
b) values equally disposed about the nominal dimension.
6 Visual and dimensional inspection
A sufficient number of samples shall be inspected for dimensional compliance.
Dimensional inspection shall be carried out as follows:
a) for bars in manufacturing or stock length: for diameter ≤ 100 mm, not less than 150 mm from the
end of the bar; for diameter > 100 mm, not less than 250 mm from the end of the bar;
b) for bars cut to length: not less than 10 mm from the end of the bar.
Table 1 —
...
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