kSIST FprEN 10270-1:2023
(Main)Steel wire for mechanical springs - Part 1: Patented cold drawn unalloyed spring steel wire
Steel wire for mechanical springs - Part 1: Patented cold drawn unalloyed spring steel wire
1.1 This European Standard applies to patented cold drawn unalloyed steel wire of circular cross-section for the manufacture of mechanical springs for static duty and dynamic duty applications.
1.2 In addition to this European Standard, the general technical delivery requirements of EN 10021 are applicable.
Stahldraht für Federn - Teil 1: Patentiert gezogener unlegierter Federstahldraht
Diese Europäische Norm gilt für patentiert gezogenen unlegierten Stahldraht mit rundem Querschnitt zur Herstellung von Federn für statische und dynamische Beanspruchungen.
Zusätzlich zu dieser Europäischen Norm gelten die allgemeinen technischen Lieferbedingungen nach EN 10021.
Fils en acier pour ressorts mécaniques - Partie 1 : Fils pour ressorts en acier non allié, patentés, tréfilés à froid
Le présent document s’applique aux fils en acier non allié patentés et tréfilés à froid de section circulaire utilisés pour la fabrication de ressorts mécaniques pour usages statiques et dynamiques.
Les exigences techniques générales de livraison se trouvent dans l’EN 10021.
Jeklena žica za vzmeti - 1. del: Patentirana hladno vlečena nelegirana jeklena žica za vzmeti
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 10270-1:2022
01-oktober-2022
Jeklena žica za vzmeti - 1. del: Patentirana hladno vlečena nelegirana jeklena žica
za vzmeti
Steel wire for mechanical springs - Part 1: Patented cold drawn unalloyed spring steel
wire
Stahldraht für Federn - Teil 1: Patentiert gezogener unlegierter Federstahldraht
Fils en acier pour ressorts mécaniques - Partie 1 : Fils pour ressorts en acier non allié,
patentés, tréfilés à froid
Ta slovenski standard je istoveten z: prEN 10270-1
ICS:
77.140.25 Vzmetna jekla Spring steels
77.140.65 Jeklene žice, jeklene vrvi in Steel wire, wire ropes and
verige link chains
oSIST prEN 10270-1:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 10270-1:2022
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oSIST prEN 10270-1:2022
DRAFT
EUROPEAN STANDARD
prEN 10270-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2022
ICS 77.140.25 Will supersede EN 10270-1:2011+A1:2017
English Version
Steel wire for mechanical springs - Part 1: Patented cold
drawn unalloyed spring steel wire
Fils en acier pour ressorts mécaniques - Partie 1 : Fils Stahldraht für Federn - Teil 1: Patentiert gezogener
pour ressorts en acier non allié, patentés, tréfilés à unlegierter Federstahldraht
froid
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 459/SC 6.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10270-1:2022 E
worldwide for CEN national Members.
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oSIST prEN 10270-1:2022
prEN 10270-1:2022 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Classification. 5
5 Information to be supplied by the purchaser . 5
6 Requirements . 6
6.1 Material . 6
6.2 Form of delivery . 6
6.3 Coating and surface finish. 6
6.4 Mechanical properties . 7
6.5 Technological properties . 19
6.6 Supply conditions of wire on coils/reels and spools . 20
6.7 Surface quality . 21
6.8 Dimensions and dimensional tolerances . 23
7 Testing and inspection . 25
7.1 Inspection and inspection documents . 25
7.2 Extent of testing for specific inspection . 25
7.3 Sampling . 25
7.4 Test methods . 25
7.5 Retests . 27
8 Marking and packaging . 27
Annex A (informative) Additional information. 30
Bibliography . 33
2
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prEN 10270-1:2022 (E)
European foreword
This document (prEN 10270-1:2022) has been prepared by Technical Committee CEN/TC 459 “ECISS –
1
European Committee for Iron and Steel Standardization” , the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 10270-1:2017.
In comparison with the previous edition, the following technical modifications have been made:
— 3.1 added specific requirements for Dynamic duty (D);
— 6.7.3 added “Protection Performance class” .
This European Standards for steel wire for mechanical springs is composed of the following parts:
— Part 1: Patented cold drawn unalloyed spring steel wire;
— Part 2: Oil hardened and tempered spring steel wire;
— Part 3: Stainless spring steel wire.
1
Through its sub-committee SC 6 “Wire rod and wires” (secretariat: AFNOR).
3
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prEN 10270-1:2022 (E)
1 Scope
This document applies to patented cold drawn unalloyed steel wire of circular cross-section for the
manufacture of mechanical springs for static duty and dynamic duty applications.
General technical delivery requirements can be found in EN 10021.
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 10021, General technical delivery conditions for steel products
EN 10204, Metallic products - Types of inspection documents
EN 10218-1, Steel wire and wire products - General - Part 1: Test methods
EN 10218-2, Steel wire and wire products - General - Part 2: Wire dimensions and tolerances
EN 10244-2, Steel wire and wire products - Non-ferrous metallic coatings on steel wire - Part 2: Zinc or zinc
alloy coatings
CEN/TR 10261, Iron and steel - European standards for the determination of chemical composition
EN ISO 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical
testing (ISO 377)
EN ISO 3887, Steels - Determination of the depth of decarburization (ISO 3887)
EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-
1)
EN ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical
composition (ISO 14284)
EN ISO 16120-1, Non-alloy steel wire rod for conversion to wire - Part 1: General requirements (ISO 16120-
1)
EN ISO 16120-2, Non-alloy steel wire rod for conversion to wire - Part 2: Specific requirements for general
purpose wire rod (ISO 16120-2)
EN ISO 16120-4, Non-alloy steel wire rod for conversion to wire - Part 4: Specific requirements for wire rod
for special applications (ISO 16120-4)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological 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/
4
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prEN 10270-1:2022 (E)
3.1
patented cold drawn wire
wire drawn to size by cold deformation of a starting material that has been subjected to a thermal
treatment of patenting (see EN ISO 4885), giving structure suitable for subsequent rolling or drawing
Note 1 to entry: For spring with Dynamic duty (D) according to Table 1, the wire has to be subjected to continuous
patenting to achieve a homogeneous microstructure (for example, continuous lead patenting prior to the wire
drawing).
4 Classification
The grade of spring wire used depends on the stress level and the nature of the duty. Where springs are
subjected to static stresses or infrequent dynamic loading, a wire grade for static duty (S) shall be used.
In the other cases with frequent or predominantly dynamic loading and where small coiling ratios or
severe bending radius is required, a wire grade for dynamic duty (D) shall be used. Depending on the
stress level, spring wire is manufactured in 3 tensile strength grades: low, medium and high.
Table 1 gives an overview of the different grades.
Table 1 — Spring wire grades
a
Tensile strength Static Dynamic
Low tensile strength SL —
Medium tensile strength SM DM
High tensile strength SH DH
a
For specific applications another tensile strength may be agreed.
5 Information to be supplied by the purchaser
The purchaser shall clearly state in his enquiry or order the product and following information:
a) the desired quantity;
b) the term spring steel wire or straightened and cut lengths;
c) the number of this document: EN 10270-1;
d) the steel grade (see Tables 1 and 2);
e) the nominal wire diameter selected from Table 3 and for cut length the length and the length
tolerance class (see Table 8);
f) the coating indicated by its abbreviation and surface finish (see 6.3);
g) the form of delivery and unit mass (see 6.2);
h) the type of inspection document (see 7.1);
i) any particular agreement.
EXAMPLE 5 t patented cold drawn tempered spring steel wire according to this standard, grade SM, nominal
diameter 2,50 mm, phosphate coated on spools of about 300 kg; inspection certificate type 3.1 according to
EN 10204:
5 t spring steel wire EN 10270-1 — SM-2,50 ph on spools of about 300 kg; EN 10204:—, 3.1.
5
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6 Requirements
6.1 Material
6.1.1 General
Steel spring wire shall be made from steel grades according to:
— for SL, SM and SH EN ISO 16120-2;
— for DM and DH EN ISO 16120-4.
For general requirements, EN ISO 16120-1 applies.
6.1.2 Chemical composition
The chemical composition according to the heat analysis shall comply with the limit values shown in
Table 2. The permissible deviation of the product analysis from the heat analysis shall be in accordance
with EN ISO 16120-2 and EN ISO 16120-4 respectively.
Table 2 — Chemical composition, % by mass
a b
Grade C Si Mn P S Cu
SL, SM, SH 0,35 to 1,00 0,10 to 0,40 to 1,20 0,035 0,035 0,20
0,30 max. max. max.
DM, DH 0,45 to 1,00 0,10 to 0,40 to 1,20 0,020 0,025 0,12
0,30 max. max. max.
a
Such a wide range is stipulated to accommodate the whole range of sizes. For individual sizes the carbon range
is substantially more restricted.
b
For the manganese content, a different range from the one indicated in the table may be agreed at the time of
ordering, with a maximum not exceeding 1,20 % and with a minimum range of 0,20 %.
The addition of micro-alloying elements may be agreed between the manufacturer and the purchaser.
NOTE Some diameter ranges require particular attention for residuals. Therefore, no figures are mentioned for
chromium, nickel, molybdenum, tin, etc., leaving room for special arrangements between Purchaser and Supplier,
dependent on their mutual processing conditions. This is also the case for the aluminium content.
6.2 Form of delivery
The wire shall be delivered in unit packages of a coil (singles, carriers or formers), spools, spoolless cores
or as straight lengths. Unless otherwise agreed at the time of ordering, the form of delivery will be coils;
straight lengths shall be supplied in bundles.
6.3 Coating and surface finish
The spring wire may be supplied phosphate coated (ph) either dry drawn or wet drawn, copper coated
(cu), zinc (Z) or zinc/aluminium (ZA) coated.
Other coatings, considered as special, can be agreed between the purchaser and the supplier
(see Annex A).
6
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If no specific surface finish is specified, the type of finish shall be at the manufacturer’s discretion.
In addition, the wire can be ordered with an oiled surface for all surface finishes.
6.4 Mechanical properties
For the tensile strength (Rm) and reduction in area after fracture (Z) the wire grades shall satisfy the
values listed in Table 3. Reduction of area shall be measured only for wire diameter 0,80 mm < d.
The range of tensile strength values within a unit package shall not exceed the values of Table 4.
7
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a
Table 3 — Mechanical properties and quality requirements for wire grades SL, SM, DM, SH and DH
1 2 3 4 5 6 7 8 9 10 11 12
b c d h
Wire diameter d Tensile strength Rm Minimum Minimum Permissible Permissible Mass
reduction number of depth of surface decarburization
kg/1 000 m
in area twists in defects for wire depth for wire
after the torsion grades DM, DH grades DM, DH
fracture Z test Nt for
for wire wire grades
grades SL, SL, SM, SH,
SM, SH, DM DM and DH
c
and DH
For wire grades
e
Nominal size Permissible SL SM DM SH DH
deviations
mm mm MPa MPa MPa MPa MPa % mm mm
d = 0,05 2 800 0,015 4
to
3 520
0,05 < d ≤ 0,06 2 800 0,022 2
to
3 520
0,06 < d ≤ 0,07 ±0,003 2 800 0,030 2
to
3 520
0,07 < d ≤ 0,08 2 800 0,039 5
to
3 480
0,08 < d ≤ 0,09 2 800 0,049 9
to
3 430
8
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1 2 3 4 5 6 7 8 9 10 11 12
0,09 < d ≤ 0,10 2 800 0,061 7
to
3 380
0,10 < d ≤ 0,11 2 800 0,074 6
to
3 350
0,11 < d ≤ 0,12 ±0,004 2 800 0,088 8
to
3 320
0,12 < d ≤ 0,14 2 800 0,121
to
3 250
f f
0,14 < d ≤ 0,16 2 800 coiling test - - 0,158
to as
3 200
0,16 < d ≤ 0,18 2 800 specified in 0,200
to
3 160
0,18 < d ≤ 0,20 ±0,005 2 800 7.4.3 0,247
to
3 110
0,20 < d ≤ 0,22 2 770 0,298
to
3 080
0,22 < d ≤ 0,25 2 720 0,385
to
3 010
9
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1 2 3 4 5 6 7 8 9 10 11 12
0,25 < d ≤ 0,28 2 680 0,488
to
2 970
0,28 < d ≤ 0,30 2 370 2 370 2 660 2 660 0,555
to to to to
2 650 2 650 2 940 2 940
0,30 < d ≤ 0,32 ±0,008 2 350 2 350 2 640 2 640 0,631
to to to to
2 630 2 630 2 920 2 920
0,32 < d ≤ 0,34 2 330 2 330 2 610 2 610 0,713
to to to to
2 600 2 600 2 890 2 890
0,34 < d ≤ 0,36 2 310 2 310 2 590 2 590 0,799
to to to to
2 580 2 580 2 870 2 870
0,36 < d ≤ 0,38 2 290 2 290 2 570 2 570 0,890
to to to to
2 560 2 560 2 850 2 850
0,38 < d ≤ 0,40 2 270 2 270 2 560 2 560
to to to to 0,985
2 550 2 550 2 830 2 830
0,40 < d ≤ 0,43 2 250 2 250 2 530 2 530
to to to to 1,14
2 520 2 520 2 800 2 800
0,43 < d ≤ 0,45 2 240 2 240 2 510 2 510
to to to to 1,25
2 500 2 500 2 780 2 780
10
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1 2 3 4 5 6 7 8 9 10 11 12
0,45 < d ≤ 0,48 2 220 2 220 2 490 2 490
to to to to 1,42
2 480 2 480 2 760 2 760
0,48 < d ≤ 0,50 ±0,008 2 200 2 200 2 480 2 480 coiling test
to to to to 1,54
2 470 2 470 2 740 2 740
0,50 < d ≤ 0,53 2 180 2 180 2 460 2 460 as
to to to to 1,73
2 450 2 450 2 720 2 720
f f
0,53 < d ≤ 0,56 2 170 2 170 2 440 2 440 specified in - -
to to to to 1,93
2 430 2 430 2 700 2 700
0,56 < d ≤ 0,60 2 140 2 140 2 410 2 410 7.4.3
to to to to 2,22
2 400 2 400 2 670 2 670
0,60 < d ≤ 0,63 2 130 2 130 2 390 2 390
to to to to 2,45
2 380 2 380 2 650 2 650
0,63 < d ≤ 0,65 2 120 2 120 2 380 2 380
to to to to 2,60
2 370 2 370 2 640 2 640
0,65 < d ≤ 0,70 ±0,010 2 090 2 090 2 360 2 360
to to to to 3,02
2 350 2 350 2 610 2 610
11
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1 2 3 4 5 6 7 8 9 10 11 12
0,70 < d ≤ 0,75 2 070 2 070 2 330 2 330
to to to to 3,47
2 320 2 320 2 580 2 580
0,75 < d ≤ 0,80 2 050 2 050 2 310 2 310
to to to to 3,95
2 300 2 300 2 560 2 560
0,80 < d ≤ 0,85 ±0,015 2 030 2 030 2 290 2 290
to to to to 4,45
2 280 2 280 2 530 2 530
0,85 < d ≤ 0,90 2 010 2 010 2 270 2 270
to to to to 4,99
2 260 2 260 2 510 2 510
0,90 < d ≤ 0,95 2 000 2 000 2 250 2 250 25
to to to to 5,59
2 240 2 240 2 490 2 490
0,95 < d ≤ 1,00 1 720 1 980 1 980 2 230 2 230
to to to to to 6,17
1 970 2 220 2 220 2 470 2 470
1,00 < d ≤ 1,05 1 710 1 960 1 960 2 210 2 210 1 % max. 1,5 % max.
to to to to to 6,80
1 950 2 200 2 200 2 450 2 450
1,05 < d ≤ 1,10 ±0,020 1 690 1 950 1 950 2 200 2 200 40 of wire of wire
to to to to to 7,46
1 940 2 190 2 190 2 430 2 430
1,10 < d ≤ 1,20 1 670 1 920 1 920 2 170 2 170 diameter diameter
to 1 to to to to 8,88
910 2 160 2 160 2 400 2 400
12
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1 2 3 4 5 6 7 8 9 10 11 12
1,20 < d ≤ 1,25 1 660 1 910 1 910 2 150 2 150
to to to to to 9,63
1 900 2 140 2 140 2 380 2 380
1,25 < d ≤ 1,30 1 640 1 900 1 900 2 140 2 140 25
to to to to to 10,42
1 890 2 130 2 130 2 370 2 370
1,30 < d ≤ 1,40 1 620 1 870 1 870 2 110 2 110
to to to to to 12,08
1 860 2 100 2 100 2 340 2 340
1,40 < d ≤ 1,50 ±0,020 1 600 1 850 1 850 2 090 2 090
to to to to to 13,90
1 840 2 080 2 080 2 310 2 310
1,50 < d ≤ 1,60 1 590 1 830 1 830 2 060 2 060
to to to to to 15,8
1 820 2 050 2 050 2 290 2 290
1,60 < d ≤ 1,70 1 570 1 810 1 810 2 040 2 040
to to to to to 17,8
1 800 2 030 2 030 2 260 2 260
1,70 < d ≤ 1,80 1 550 1 790 1 790 2 020 2 020
to to to to to 20,0
1 780 2 010 2 010 2 240 2 240
1,80 < d ≤ 1,90 1 540 1 770 1 770 2 000 2 000
to to to to to 22,3
1 760 1 990 1 990 2 220 2 220
1,90 < d ≤ 2,00 1 520 1 760 1 760 1 980 1 980 1 % max. 1,5 % max.
to to to to to 24,7
1 750 1 970 1 970 2 200 2 200
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1 2 3 4 5 6 7 8 9 10 11 12
2,00 < d ≤ 2,10 ±0,025 1 510 1 740 1 740 1 970 1 970 22 of wire of wire
to to to to to 27,2
1 730 1 960 1 960 2 180 2 180
2,10 < d ≤ 2,25 1 490 1 720 1 720 1 940 1 940 40 diameter diameter
to to to to to 31,2
1 710 1 930 1 930 2 150 2 150
2,25 < d ≤ 2,40 1 470 1 700 1 700 1 920 1 920
to to to to to 35,5
1 690 1 910 1 910 2 130 2 130
2,40 < d ≤ 2,50 1 460 1 690 1 690 1 900 1 900
to to to to to 38,5
1 680 1 890 1 890 2 110 2 110
2,50 < d ≤ 2,60 1 450 1 670 1 670 1 890 1 890
to to to to to 41,7
1 660 1 880 1 880 2 100 2 100
2,60 < d ≤ 2,80 1 420 1 650 1 650 1 860 1 860
to to to to to 48,3
1 640 1 850 1 850 2 070 2 070
2,80 < d ≤ 3,00 1 410 1 630 1 630 1 840 1 840
to to to to to 55,5
1 620 1 830 1 830 2 040 2 040
3,00 < d ≤ 3,20 ±0,030 1 390 1 610 1 610 1 820 1 820
to to to to to 63,1
1 600 1 810 1 810 2 020 2 020
3,20 < d ≤ 3,40 1 370 1 590 1 590 1 790 1 790
to to to to to 71,3
1 580 1 780 1 780 1 990 1 990
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1 2 3 4 5 6 7 8 9 10 11 12
3,40 < d ≤ 3,60 1 350 1 570 1 570 1 770 1 770 16
to to to to to 79,9
1 560 1 760 1 760 1 970 1 970
3,60 < d ≤ 3,80 1 340 1 550 1 550 1 750 1 750
to to to to to 89,0
1 540 1 740 1 740 1 950 1 950
3,80 < d ≤ 4,00 ±0,030 1 320 1 530 1 530 1 740 1 740
to to to to to 98,6
1 520 1 730 1 730 1 930 1 930
4,00 < d ≤ 4,25 1 310 1 510 1 510 1 710 1 710 16
to to to to to 111
1 500 1 700 1 700 1 900 1 900
4,25 < d ≤ 4,50 1 290 1 500 1 500 1 690 1 690
to to to to to 125
1 490 1 680 1 680 1 880 1 880
4,50 < d ≤ 4,75 ±0,035 1 270 1 480 1 480 1 680 1 680 12
to to to to to 139
1 470 1 670 1 670 1 860 1 860
4,75 < d ≤ 5,00 1 260 1 460 1 460 1 660 1 660
to to to to to 154
1 450 1 650 1 650 1 840 1 840
5,00 < d ≤ 5,30 1 240 1 440 1 440 1 640 1 640 35 11
to to to to to 173
1 430 1 630 1 630 1 820 1 820
5,30 < d ≤ 5,60 1 230 1 430 1 430 1 620 1 620 11
to to to to to 193
1 420 1 610 1 610 1 800 1 800
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1 2 3 4 5 6 7 8 9 10 11 12
5,60 < d ≤ 6,00 1 210 1 400 1 400 1 590 1 590 10 1 % max. 1,5 % max.
to to to to to 222
1 390 1 580 1 580 1 770 1 770
6,00 < d ≤ 6,30 ±0,040 1 190 1 390 1 390 1 570 1 570 9 of wire of wire
to to to to to 245
1 380 1 560 1 560 1 750 1 750
6,30 < d ≤ 6,50 1 180 1 380 1 380 1 560 1 560 9 diameter diameter
to to to to to 260
1 370 1 550 1 550 1 740 1 740
6,50 < d ≤ 7,00 1 160 1 350 1 350 1 540 1 540 9
to to to to to 302
1 340 1 530 1 530 1 710 1 710
g
7,00 < d ≤ 7,50 1 140 1 330 1 330 1 510 1 510 7
to to to to to 347
1 320 1 500 1 500 1 680 1 680
g
7,50 < d ≤ 8,00 1 120 1 310 1 310 1 490 1 490 7
to to to to to 395
1 300 1 480 1 480 1 660 1 660
g
8,00 < d ≤ 8,50 ±0,045 1 110 1 290 1 290 1 470 1 470 6
to to to to to 445
1 280 1 460 1 460 1 630 1 630
g
8,50 < d ≤ 9,00 1 090 1 270 1 270 1 450 1 450 6
to to to to to 499
1 260 1 440 1 440 1 610 1 610
g
9,00 < d ≤ 9,50 1 070 1 260 1 260 1 430 1 430 30 5
±0,050 to to to to to 559
1 250 1 420 1 420 1 590 1 590
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1 2 3 4 5 6 7 8 9 10 11 12
g
9,50 < d ≤ 10,00 1 060 1 240 1 240 1 410 1 410 5
to to to to to 617
1 230 1 400 1 400 1 570 1 570
10,00 < d ≤ 10,50 1 220 1 220 1 390 1 390
±0,070 to to to to 680
1 380 1 380 1 550 1 550
10,50 < d ≤ 11,00 - 1 210 1 210 1 380 1 380 -
to to to to 746
1 370 1 370 1 530 1 530
11,00 < d ≤ 12,00 ±0,080 1 180 1 180 1 350 1 350
to to to to 888
1 340 1 340 1 500 1 500
12,00 < d ≤ 12,50 1 170 1 170 1 330 1 330 963
to to to to
1 320 1 320 1 480 1 480
12,50 < d ≤ 13,00 ±0,080 1 160 1 160 1 320 1 320 1 042
to to to to
1 310 1 310 1 470 1 470
13,00 < d ≤ 14,00 1 130 1 130 1 290 1 290 1 208
to to to to
1 280 1 280 1 440 1 440
14,00 < d ≤ 15,00 1 110 1 110 1 270 1 270 28 1 % max. 1,5 % max. 1 387
to to to to
1 260 1 260 1 410 1 410
15,00 < d ≤ 16,00 - 1 090 1 090 1 240 1 240 - of wire of wire 1 578
to to to to
1 230 1 230 1 390 1 390
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oSIST prEN 10270-1:2022
prEN 10270-1:2022 (E)
1 2 3 4 5 6 7 8 9 10 11 12
16,00 < d ≤ 17,00 ±0,090 1 070 1 070 1 220 1 220 diameter diameter 1 782
to to to to
1 210 1 210 1 360 1 360
17,00 < d ≤ 18,00 1 050 1 050 1 200 1 200 1 998
to to to to
1 190 1 190 1 340 1 340
18,00 < d ≤ 19,00 1 030 1 030 1 180 1 180 2 225
±0,100 to to to to
1 170 1 170 1 320 1 320
19,00 < d ≤ 20,00 1 020 1 020 1 160 1 160 2 466
to to to to
1 150 1 150 1 300 1 300
a
Wire with diameter 20 mm < d diameter is used. Where such wire is specified, the parties shall agree upon the properties and requirements at the time of
enquiry and order.
b
For sizes not mentioned, the required strength shall be derived from the mathematical formulae given in A.4.
c
For straightened and cut lengths, the tensile strength values may be up to 10 % lower, torsion values are also lowered by the straightening and cutting
operation.
d 2
1 MPa = 1 N/mm .
e
For diameters 0,05 mm ≤ d ≤ 0,18 mm, a restricted tensile strength range of 300 MPa within the specified range may be agreed.
f
Because of the small wire diameter, measurement of the depth of defects or depth of decarburization can only be carried out with difficulty. For this reason,
no maximum value is specified for this diameter range.
g
Guideline values; not mandatory for acceptance.
h
Mass values are valid only for the upper limit of the diameter range. Mass values for interim diameter values can be calculated according to the following
formula:
2
m = d2 x 0,062 kg / (1 000 m x mm ).
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oSIST prEN 10270-1:2022
prEN 10270-1:2022 (E)
Table 4 — Permissible tensile strength range within a single unit package in MPa
Nominal diameter d SL, SM, SH DM, DH
mm
d ≤ 0,80 150 150
0,80 < d ≤ 1,60 120 100
1,60 < d 120 70
The requirements apply to unit packages the mass of which in kilograms does not exceed the value of
250 x d (d = wire diameter in mm) or a maximum value of 1 000 kg.
In cases of coils of greater mass, appropriate agreements shall be made.
6.5 Technological properties
6.5.1 Coiling test
In order to assess the uniformity of the wire in the coiling deformation and its surface condition, the
coiling test shall be carried out on wire with a diameter d ≤ 0,70 mm for the grades DM, SH and DH.
In the test as described further in 7.4.3, the test piece shall exhibit a defect-free surface without splits or
fracture, a uniform pitch of the turns after coiling and a fair dimensional regularity of its diameter.
Although the usefulness of the coiling test is not generally recognized, it has been retained since it offers
the possibility of revealing internal stresses. If doubtful test results are obtained the wire concerned
should not be rejected immediately, but efforts should be made by the parties concerned to elucidate the
cause.
6.5.2 Simple torsion test
For assessing the deformability, fracture behaviour and surface condition the torsion test shall be carried
out for all wire grades on wires in the nominal diameter range 0,70 mm < d ≤ 10 mm. The minimum
number of turns specified in Table 3 for diameters d ≤ 7,00 mm is mandatory. For wires exceeding this
size, they shall be taken only as indicative values.
In executing the test according to 7.4.5, the required number of turns shall be achieved before the test
piece fractures. The fracture of the torsion test piece shall be perpendicular to the wire axis (see
EN 10218-1: Types 1a, 2a or 3a).
Spring back resilience cracks or spring back fractures (“spoon” or “secondary” fractures) are no
...
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