SIST EN 10294-1:2005
(Main)Hollow bars for machining - Technical delivery conditions - Part 1: Non alloy and alloy steels
Hollow bars for machining - Technical delivery conditions - Part 1: Non alloy and alloy steels
This part of EN 10294 specifies the technical delivery conditions for seamless steel hollow bars intended for the manufacture of engineering components by machining.
Machinability requirements are defined and a list of hollow bar size codes is given with the related dimensions achievable after machining when centring on the outside diameter.
NOTE Dimensional requirements for other products, for example, applying when centring on the inside diameter may be agreed between purchaser and manufacturer at the time of enquiry and order (see Options 3 and 4).
Stahlrohre für die spanende Bearbeitung (Drehteilrohre) - Technische Lieferbedingungen - Teil 1: Unlegierte und legierte Stähle
Dieser Teil der EN 10294 legt die technischen Lieferbedingungen für nahtlose Stahlrohre (Drehteilrohre) fest,
die für die Fertigung von spanend gefertigten Teilen für den Maschinenbau bestimmt sind.
Anforderungen an die Zerspanbarkeit sind definiert, und eine Liste von Erzeugnisbezeichnungen mit den
entsprechenden Maßen nach der spanenden Bearbeitung bei Zentrierung auf den Außendurchmesser wird
vorgelegt.
ANMERKUNG Maßanforderungen für andere Erzeugnisse, die z. B. bei Zentrierung auf den Innendurchmesser gelten,
können zwischen Besteller und Hersteller bei der Anfrage und Bestellung vereinbart werden (siehe Optionen 3 und 4).
Barres creuses pour usinage - Conditions techniques de livraison - Partie 1 : Aciers non alliés et alliés
La présente partie de l'EN 10294 spécifie les conditions techniques de livraison pour les barres creuses en acier sans soudure destinées a la fabrication de composants mécaniques par usinage.
Des prescriptions d'usinabilité y sont définies et une liste des désignations de produit y est donnée avec les dimensions correspondantes qu'il est possible d'obtenir apres usinage, lorsque le centrage est effectué sur le diametre extérieur.
NOTE Des prescriptions dimensionnelles concernant d’autres produits, par exemple lorsque le centrage est effectué sur le diametre intérieur, peuvent faire l'objet d'un accord entre l'acheteur et le producteur au moment de l'appel d'offres et de la commande (voir options 3 et 4).
Votle palice za strojno obdelavo – Tehnični dobavni pogoji – 1. del: Nelegirana in legirana jekla
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 10294-1:2005
01-december-2005
9RWOHSDOLFH]DVWURMQRREGHODYR±7HKQLþQLGREDYQLSRJRML±GHO 1HOHJLUDQDLQ
OHJLUDQDMHNOD
Hollow bars for machining - Technical delivery conditions - Part 1: Non alloy and alloy
steels
Stahlrohre für die spanende Bearbeitung (Drehteilrohre) - Technische Lieferbedingungen
- Teil 1: Unlegierte und legierte Stähle
Barres creuses pour usinage - Conditions techniques de livraison - Partie 1 : Aciers non
alliés et alliés
Ta slovenski standard je istoveten z: EN 10294-1:2005
ICS:
77.140.75 Jeklene cevi in cevni profili Steel pipes and tubes for
za posebne namene specific use
SIST EN 10294-1:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 10294-1:2005
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SIST EN 10294-1:2005
EUROPEAN STANDARD
EN 10294-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2005
ICS 77.140.75
English Version
Hollow bars for machining - Technical delivery conditions - Part
1: Non alloy and alloy steels
Barres creuses pour usinage - Conditions techniques de Stahlrohre für die spanende Bearbeitung (Drehteilrohre) -
livraison - Partie 1 : Aciers non alliés et alliés Technische Lieferbedingungen - Teil 1: Unlegierte und
legierte Stähle
This European Standard was approved by CEN on 29 August 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10294-1:2005: E
worldwide for CEN national Members.
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SIST EN 10294-1:2005
EN 10294-1:2005 (E)
Contents Page
Foreword .4
1 Scope .5
2 Normative references .5
3 Terms and definitions.5
4 Symbols.6
5 Classification and designation .6
5.1 Classification.6
5.2 Designation .6
6 Information to be supplied by the purchaser.7
6.1 Mandatory information .7
6.2 Options .7
6.3 Example of an order.7
7 Manufacturing process.8
7.1 Steelmaking process .8
7.2 Deoxidation process.8
7.3 Tube manufacture and delivery conditions .8
8 Requirements .8
8.1 General .8
8.2 Chemical composition.8
8.3 Mechanical properties .10
8.4 Machinability .11
8.5 Appearance .11
8.6 Straightness .11
8.7 Preparation of ends .12
8.8 Dimensions, masses and tolerances.12
9 Inspection.22
9.1 Type of inspection .22
9.2 Inspection documents .22
9.3 Inspection and testing .23
10 Sampling.23
10.1 Frequency of tests .23
10.2 Preparation of samples and test pieces.24
11 Test methods.24
11.1 Tensile test .24
11.2 Impact test.24
11.3 Dimensional inspection.25
11.4 Visual examination.25
11.5 Retests, sorting and reprocessing .25
12 Marking .25
13 Temporary corrosion protection.26
Annex A (normative) Method for establishing machinability data.27
A.1 General .27
A.2 Tube sizes.27
A.3 Machining parameters .27
2
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EN 10294-1:2005 (E)
Bibliography.28
3
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SIST EN 10294-1:2005
EN 10294-1:2005 (E)
Foreword
This European Standard (EN 10294-1:2005) has been prepared by Technical Committee ECISS/TC 29 “steel
tubes and fittings for steel tubes”, the secretariat of which is held by UNI.
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 April 2006, and conflicting national standards shall be withdrawn at the
latest by April 2006.
This European Standard differs from ISO 2938, Hollow bars for machining.
Another part of EN 10294 in course of preparation is:
Part 2: Stainless steels.
Other European Standard series covering tubes for mechanical and general engineering purposes are:
EN 10296, Welded steel tubes for mechanical and general engineering purposes,
EN 10297, Seamless steel tubes for mechanical and general engineering purposes.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
4
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SIST EN 10294-1:2005
EN 10294-1:2005 (E)
1 Scope
This part of EN 10294 specifies the technical delivery conditions for seamless steel hollow bars intended for
the manufacture of engineering components by machining.
Machinability requirements are defined and a list of hollow bar size codes is given with the related dimensions
achievable after machining when centring on the outside diameter.
NOTE Dimensional requirements for other products, for example, applying when centring on the inside diameter may
be agreed between purchaser and manufacturer at the time of enquiry and order (see Options 3 and 4).
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For
dated references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 10002-1, Metallic materials – Tensile testing – Part 1: Method of test at ambient temperature.
EN 10020:2000, Definition and classification of grades of steel.
EN 10021:1993, General technical delivery requirements for steel and iron products.
EN 10045-1, Metallic materials – Charpy impact test – Part 1: Test method.
EN 10052:1993, Vocabulary of heat treatment terms for ferrous products.
EN 10168, Steel products – Inspection documents – List of information and description.
EN 10204, Metallic products – Types of inspection documents.
EN 10266:2003, Steel tubes, fittings and structural hollow sections – Symbols and definitions of terms for use
in product standards.
EN ISO 377, Steel and steel products – Location and preparation of samples and test pieces for mechanical
testing (ISO 377:1997).
EN ISO 2566-1, Steel – Conversion of elongation values – Part 1: Carbon and low alloy steels (ISO 2566-
1:1984).
ISO 3685, Tool-life testing with single-point turning tools.
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 10020:2000,
EN 10021:1993, EN 10052:1993 and EN 10266:2003 and the following apply.
3.1
hollow bar
circular long product made by a seamless tube manufacturing process or by drilling a bore into a rolled or
forged bar
These products are characterized by special dimensions and material properties which confer machinability,
suitability for heat treatment and surface condition suitable for final machining of the component
5
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SIST EN 10294-1:2005
EN 10294-1:2005 (E)
3.2
centering on outside diameter
first chucking is made on the outside diameter and machining is performed on the outside surface and/or on
the inside surface
3.3
centering on the inside diameter
first chucking is made on the inside diameter and machining is performed on the outside surface and/or on the
inside surface
3.4
normalizing forming
rolling process in which the final deformation is carried out in a certain temperature range leading to a material
condition equivalent to that obtained after normalizing so that the specified values of the mechanical
properties are retained even after normalizing
NOTE When throughout this European Standard the term tube is used, it is synonymous to hollow bar.
4 Symbols
In addition to (or deviating from) the symbols defined in EN 10266:2003 the following symbols apply:
CS Cutting speed, in metres per minute
D Maximum achievable outside diameter when centring on the outside diameter; in millimetres
e
Di Minimum achievable inside diameter when centring on the outside diameter, in millimetres
e
D Manufacturer’s specific outside diameter of the delivered product, in millimetres
d
T Manufacturer’s specific wall thickness of the delivered product, in millimetres
d
T Time to obtain a 0,3 mm tool wear, in minutes
0,3
T Nominal wall thickness, calculated as the half difference between the maximum achievable outside
N
diameter D and the minimum achievable inside diameter Di
, in millimetres
e e
5 Classification and designation
5.1 Classification
In accordance with the classification system in EN 10020, all steel grades except E590K2 are non-alloy quality
steels; the steel grade E590K2 is a non-alloy special steel.
5.2 Designation
For tubes covered by this part of EN 10294 the steel designation consists of:
number of this part of this European standard (EN 10294-1);
plus either:
steel name in accordance with EN 10027-1;
6
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EN 10294-1:2005 (E)
or
steel number in accordance with EN 10027-2.
The steel name is defined by:
capital letter E for engineering purposes;
indication of the specified minimum yield strength for thicknesses ≤ 16 mm, expressed in MPa.
6 Information to be supplied by the purchaser
6.1 Mandatory information
The following information shall be supplied by the purchaser at the time of enquiry and order:
a) quantity (mass or total length or number);
b) term "hollow bar";
c) hollow bar size code;
d) reference to this European Standard;
e) steel grade (steel name or steel number);
f) mechanical properties for tubes with wall thickness T greater than 50 mm.
N
6.2 Options
A number of options are specified in this European Standard and these are listed below. In the event that the
purchaser does not indicate a wish to implement any of these options at the time of enquiry and order, the
hollow bars shall be supplied in accordance with the basic specification (see 6.1).
1) supply of machinability data to the purchaser (see 8.4);
2) special criteria for surface condition (see 8.5);
3) clean turned sizes when centring on the inside diameter(see 8.8.3);
4) exact lengths (see 8.8.4);
5) inspection document 3.2 (see 9.2.1);
6) temporary corrosion protection (see clause 13).
6.3 Example of an order
50 t of hollow bars in accordance with EN 10294-1, hollow bar size code 9065, made of steel grade E470:
50 t hollow bars – 9065 – EN 10294-1 – E470
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EN 10294-1:2005 (E)
7 Manufacturing process
7.1 Steelmaking process
The steels covered by this European Standard are characterized by their suitability for machining (see 8.4).
The steelmaking process is left at the discretion of the manufacturer provided all requirements defined in
clause 8 can be fulfilled with the material produced.
7.2 Deoxidation process
Steels shall be fully killed.
7.3 Tube manufacture and delivery conditions
The products shall be manufactured by a seamless process or by machining from round bars. At the
discretion of the manufacturer the tubes may be hot finished or cold finished before any heat treatment in
accordance with Table 1 is applied.
Cold finished products in grades E355 and E470 shall subsequently be either stress relieved or annealed or
normalized. The method is left at the discretion of the manufacturer.
The delivery conditions are given in Table 1.
Table 1 – Delivery condition
a
Steel name
Delivery condition
E355 No heat treatment required
E355J2 Normalized or normalizing-formed
E470 No heat treatment required
E420J2 Normalized or normalizing-formed
E590K2 Quenched + tempered
a
See requirements for cold finished products in 7.3
8 Requirements
8.1 General
The hollow bars, when supplied in a delivery condition according to 7.3 and inspected in accordance with
clauses 9, 10 and 11, shall comply with the requirements of this part of EN 10294.
In addition, the general technical delivery conditions specified in EN 10021 shall apply.
8.2 Chemical composition
The cast analysis reported by the steel producer shall apply and conform to the requirements of Table 2.
In case of dispute the permissible deviations of a product analysis from the limits of cast analysis specified in
Table 2 are given in table 3.
NOTE When welding products produced from hollow bars according to this European Standard, account should be
taken of the fact that the behaviour of the steel during and after welding is dependent not only on the steel, but also on the
material thickness and the conditions of preparing for and carrying out welding.
8
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EN 10294-1:2005 (E)
a
Table 2 – Chemical composition (cast analysis) in % by mass
b b c
Steel grade C si Mn P S Cr Mo Ni Al Cu N Nb Ti V
max max max max max Max max max
Name Number min max min max min max min max min max min max
d
E355 1.0580 - 0,22 - 0,55 - 1,60 0,030 0,015 0,050 - - - - - - - - - - -
E355J2 1.0592 - 0,22 - 0,55 - 1,60 0,030 0,015 0,050 0,30 0,08 0,30 0,010 0,060 0,30 0,020 0,05 0,05 - 0,10
E420J2 1.0599 0,16 0,22 0,10 0,50 1,30 1,70 0,030 0,015 0,050 0,30 0,08 0,40 0,010 - 0,30 0,020 0,07 0,05 0,08 0,15
E470 1.0536 0,16 0,22 0,10 0,50 1,30 1,70 0,030 0,015 0,050 - - - 0,010 - - 0,020 0,07 - 0,08 0,15
E590K2 1.0644 0,16 0,22 0,10 0,50 1,30 1,70 0,030 0,015 0,050 0,30 0,08 0,40 0,010 - 0,30 0,020 0,07 0,05 0,08 0,15
a
Elements not included in this table shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for finishing the cast. All
appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steelmaking process.
b
The content of these elements need not to be reported unless intentionally added to the cast.
c
V may be replaced by Nb or Ti percent for percent provided that the V content shall be at least 0,05 % and the sum V + Nb + Ti is ≤ 0,21 %.
d Additions of Nb, V or Ti are permitted and left at the discretion of the manufacturer. The content of these elements shall be reported
9
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EN 10294-1:2005 (E)
Table 3 – Permissible deviations of the product analysis from specified limits on cast analysis
given in Table 2
Limiting value for the
Permissible deviation
Element cast analysis according
of the product analysis
to Table 2
C ≤ 0,22 ± 0,02
Si ≤ 0,55 ± 0,05
Mn ≤ 1,70 - 0,05 / + 0,10
P ≤ 0,030 + 0,005
S ≤ 0,050 - 0,003/+ 0,005
Cr ≤ 0,30 + 0,05
Ni ≤ 0,40 + 0,05
Mo ≤ 0,08 + 0,02
Cu ≤ 0,30 + 0,05
N ≤ 0,020 + 0,002
Al ≤ 0,060 ± 0,005
Nb ≤ 0,07 + 0,01
V ≤ 0,15 ± 0,02
Ti ≤ 0,05 + 0,01
8.3 Mechanical properties
The mechanical properties of the tubes shall conform to the requirements of Table 4.
a
Table 4 – Mechanical properties
Upper yield strength Tensile strength
Elongation
ReH min Rm min
in the
Steel
M
...
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