SIST EN ISO 24598:2008

SLOVENSKI STANDARD
SIST EN ISO 24598:2008
01-april-2008
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Welding consumables - Solid wire electrodes, tubular cored electrodes and electrode/flux
combinations for submerged arc welding of creep-resisting steels - Classification (ISO
24598:2007)
Schweißzusätze - Drahtelektroden, Fülldrahtelektroden und Draht-Pulver-Kombinationen
für das Unterpulverschweißen von warmfesten Stählen - Einteilung (ISO 24598:2007)
Produits consommables pour le soudage - Fils-électrodes pleins, fils-électrodes fourrés
et couples fil-flux pour le soudage à l'arc sous flux des aciers résistant au fluage -
Classification (ISO 24598:2007)
Ta slovenski standard je istoveten z: EN ISO 24598:2007
ICS:
25.160.20
SIST EN ISO 24598:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 24598
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2007
ICS 25.160.20

English Version
Welding consumables - Solid wire electrodes, tubular cored
electrodes and electrode/flux combinations for submerged arc
welding of creep-resisting steels - Classification (ISO
24598:2007)
Produits consommables pour le soudage - Fils-électrodes Schweißzusätze - Drahtelektroden, Fülldrahtelektroden und
pleins, fils-électrodes fourrés et couples fil-flux pour le Draht-Pulver-Kombinationen für das Unterpulverschweißen
soudage à l'arc sous flux des aciers résistant au fluage - von warmfesten Stählen - Einteilung (ISO 24598:2007)
Classification (ISO 24598:2007)
This European Standard was approved by CEN on 17 November 2007.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, 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
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 24598:2007: E
worldwide for CEN national Members.

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EN ISO 24598:2007 (E)
Contents Page
Foreword.3

2

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EN ISO 24598:2007 (E)
Foreword
This document (EN ISO 24598:2007) has been prepared by Technical Committee ISO/TC 44 "Welding and
allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding” 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 June 2008, and conflicting national standards shall be withdrawn at
the latest by June 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 24598:2007 has been approved by CEN as a EN ISO 24598:2007 without any modification.

3

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INTERNATIONAL ISO
STANDARD 24598
First edition
2007-11-15


Welding consumables — Solid wire
electrodes, tubular cored electrodes and
electrode/flux combinations for
submerged arc welding of creep-resisting
steels — Classification
Produits consommables pour le soudage — Fils-électrodes pleins, fils-
électrodes fourrés et couples fil-flux pour le soudage à l'arc sous flux
des aciers résistant au fluage — Classification




Reference number
ISO 24598:2007(E)
©
ISO 2007

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ISO 24598:2007(E)
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©  ISO 2007
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ii © ISO 2007 – All rights reserved

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ISO 24598:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Classification. 2
4 Symbols and requirements. 3
4.1 Symbol for the product/process . 3
4.2 Symbols for the tensile properties of the all-weld metal deposit . 3
4.3 Symbols for impact properties of all-weld metal deposits. 3
4.4 Symbol for types of welding flux . 5
4.5 Symbol for the chemical composition of solid wire electrodes and of all-weld metal
deposits . 5
4.6 Rounding-off procedure. 6
5 Mechanical tests . 9
5.1 Preheating, interpass and post-weld heat treatment temperatures . 9
5.2 Welding conditions and pass sequence . 12
6 Chemical analysis. 13
7 Retests . 13
8 Technical delivery conditions . 14
9 Examples of designations . 14
Bibliography . 17

© ISO 2007 – All rights reserved iii

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ISO 24598:2007(E)
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 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 24598 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 3, Welding consumables.
Requests for official interpretations of any aspect of this International Standard should be directed to the
Secretariat of ISO/TC 44/SC 3 via your national standards body. A listing of these bodies can be found at
http://www.iso.org.
iv © ISO 2007 – All rights reserved

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ISO 24598:2007(E)
Introduction
This International Standard provides a classification in order to designate solid wire electrodes in terms of their
chemical composition, solid wire electrodes and tubular cored electrodes in terms of the deposit composition
obtained with a particular submerged arc flux and, where required, electrode-flux combinations in terms of the
yield strength, tensile strength and elongation of the all-weld metal deposit. The ratio of yield to tensile
strength of weld metal is generally higher than that of parent metal. Users should note that matching weld
metal yield strength to parent metal yield strength will not necessarily ensure that the weld metal tensile
strength matches that of the parent material. Where the application requires matching tensile strength,
therefore, selection of the consumable should be made by reference to column 3 of Table 1A or Table 1B, as
appropriate.
Although combinations of wire electrodes and fluxes supplied by individual companies may have the same
grading, the individual wire electrodes and fluxes from different companies are not interchangeable unless
verified in accordance with this International Standard.
It should be noted that the mechanical properties of all-weld metal test pieces used to classify the wire
electrodes will vary from those obtained in production joints because of differences in welding procedure such
as electrode size, welding position and material composition.
This International Standard recognizes that there are two somewhat different approaches in the global market
to classifying a given wire electrode, tubular cored electrode or electrode/flux combination, and allows for
either or both to be used to suit a particular market need. Application of either type of classification
designation (or of both where suitable) identifies a product as classified in accordance with this International
Standard. The classification in accordance with system A is mainly based on EN 12070:1999. The
classification in accordance with system B is mainly based upon standards used around the Pacific Rim.
Future revisions will aim to merge the two approaches into a single classification system.

© ISO 2007 – All rights reserved v

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INTERNATIONAL STANDARD ISO 24598:2007(E)

Welding consumables — Solid wire electrodes, tubular cored
electrodes and electrode/flux combinations for submerged arc
welding of creep-resisting steels — Classification
1 Scope
This International Standard specifies requirements for classification of solid wire electrodes, tubular cored
electrodes and electrode/flux combinations (all-weld metal deposits) for submerged arc welding of creep-
resisting and low-alloy elevated-temperature steels. One flux can be tested and classified with different
electrodes. One electrode can be tested and classified with different fluxes. The solid wire electrode is also
classified separately based on its chemical composition.
This International Standard is a combined specification providing for classification utilizing a system based
upon the chemical composition of the solid wire electrode and all-weld metal deposit, or utilizing a system
based upon the tensile strength of the all-weld metal deposit and the chemical composition of the solid wire
electrode and all-weld metal deposit obtained with the electrode/flux combination.
1) Clauses, subclauses and tables which carry the suffix letter “A” are applicable only to solid wire
electrodes, tubular cored electrodes and all-weld metal deposits classified in accordance with the
system based upon chemical composition.
2) Clauses, subclauses and tables which carry the suffix letter “B” are applicable only to solid wire
electrodes, tubular cored electrodes and all-weld metal deposits classified in accordance with the
system based upon the tensile strength of all-weld metal deposits and the chemical composition of
solid wire electrodes and all-weld metal deposits.
3) Clauses, subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B”
are applicable to all solid wire electrodes, tubular cored electrodes and electrode/flux combinations
classified under this International Standard.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 31-0:1992, Quantities and units — Part 0: General principles
ISO 544, Welding consumables — Technical delivery conditions for welding filler materials — Type of product,
dimensions, tolerances and marking
ISO 6847, Welding consumables — Deposition of a weld metal pad for chemical analysis
ISO 13916, Welding — Guidance on the measurement of preheating temperature, interpass temperature and
preheat maintenance temperature
ISO 14174, Welding consumables — Fluxes for submerged arc welding — Classification
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ISO 24598:2007(E)
ISO 14344, Welding and allied processes — Flux and gas shielded electrical welding processes —
Procurement guidelines for consumables
ISO 15792-1, Welding consumables — Test methods — Part 1: Test methods for all-weld metal test
specimens in steel, nickel and nickel alloys
3 Classification
Classification designations are based upon two approaches to indicate the chemical composition of the solid
wire electrode, the chemical composition of the all-weld metal deposit obtained with a solid wire electrode or
tubular cored electrode, and the tensile properties and impact properties of the all-weld metal deposits
obtained with a given electrode/flux combination. The two designation approaches include additional
designators for some other classification requirements, but not all, as will be clear from the following clauses.
In many cases, a given commercial product can be classified in accordance with both systems. Then either or
both classification designations can be used for the product.
A solid wire electrode shall be classified in accordance with its chemical composition as given in Table 4.
An all-weld metal deposit from a solid wire electrode or tubular cored electrode shall be classified in
accordance with the all-weld metal deposit composition, as given in Table 5, obtained with a particular flux.
When the solid wire electrode or tubular cored electrode is classified in combination with a flux for submerged
arc welding, the classification shall be prefixed with a symbol in accordance with Clause 4 as appropriate.
3A Classification by chemical composition 3B Classification by tensile strength and
chemical composition
The classification is divided into three parts: The classification is divided into five parts:
1) the first part gives a symbol indicating the 1) the first part gives a symbol indicating the
product/process to be identified; product/process to be identified;
2) the second part gives a symbol indicating the 2) the second part gives a symbol indicating the
chemical composition of the solid wire electrode strength and elongation of the all-weld metal
(see Table 4) and all-weld metal deposit (see deposit in the post-weld heat-treated condition
Table 5); (see Table 1B);
 3) the third part gives a symbol indicating the
impact properties of all-weld metal deposits in
the same condition as specified for the tensile
strength (see Table 2B);
3) the third part gives a symbol indicating the type 4) the fourth part gives a symbol indicating the
of flux used (see Table 3). type of flux used (see Table 3);
 5) the fifth part gives a symbol indicating the
chemical composition of the solid wire
electrode, if used (see Table 4), and of the all-
weld metal deposited by an electrode/flux
combination (see Table 5).
2 © ISO 2007 – All rights reserved

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ISO 24598:2007(E)
4 Symbols and requirements
A solid wire electrode can be classified separately based upon its chemical composition, as specified in
Table 4. The all-weld metal deposit composition and mechanical properties obtained with a particular solid
wire electrode or tubular cored electrode will vary somewhat depending upon the flux used. Accordingly, the
classification of the all-weld metal deposit obtained with a particular solid wire electrode or tubular cored
electrode may be different for different fluxes.
4.1 Symbol for the product/process
The symbol for the weld deposit produced by a solid or tubular electrode using the submerged arc welding
process with a particular flux, shall be the letter “S” placed at the beginning of the designation.
4.1A Classification by chemical composition 4.1B Classification by tensile strength and
chemical composition
The symbol for the solid wire electrode for use in the The symbol for the solid wire electrode for use in the
submerged arc welding process shall be the letter submerged arc welding process shall be the letters
“S” placed at the beginning of the wire electrode “SU” placed at the beginning of the solid wire
designation. electrode designation.
The symbol for the tubular wire electrode for use in
the submerged arc welding process shall be the
letters “TU” placed at the beginning of the tubular
wire electrode designation.
4.2 Symbols for the tensile properties of the all-weld metal deposit
4.2A Classification by chemical composition 4.2B Classification by tensile strength and
chemical composition
No symbol shall be used for the mechanical The symbols in Table 1B indicate the tensile
properties of the all-weld metal deposit. The strength, yield strength and elongation of the
all-weld metal deposit produced in combination all-weld metal deposit in the post-weld heat-treated
with a particular flux shall fulfil the tensile-property condition determined, in accordance with 5.1, with
requirements specified in Table 1A. a particular flux.
4.3 Symbols for impact properties of all-weld metal deposits
4.3A Classification by chemical composition 4.3B Classification by tensile strength and
chemical composition
No symbol shall be used for the impact properties of The symbols in Table 2B indicate the temperature at
the all-weld metal deposits. The all-weld metal which an impact energy of 27 J is achieved in the
deposits produced in combination with a particular post-weld heat-treated condition under the
flux shall fulfil the impact property requirements conditions given in Clause 5. Five test pieces shall
specified in Table 1A. be tested. The lowest and highest values obtained
shall be disregarded. Two of the three remaining
values shall be greater than the specified 27 J level;
one of the three may be lower but shall be no less
than 20 J. The average of the three remaining
values shall be at least 27 J.
When an all-weld metal deposit has been classified
for a certain temperature, it automatically covers any
higher temperature listed in Table 2B.
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ISO 24598:2007(E)
Table 1A — Mechanical properties of all-weld metal deposits (classification by chemical composition)
Impact energy at
+ 20° C Heat treatment
a
Minimum Minimum Minimum
J
proof tensile elongation
Alloy
strength strength
Minimum Minimum Preheat Post-weld heat treatment
symbol
average single and of test piece
R R A
p0,2 m
b
from three value interpass
c d
Temperature Time
test pieces temperature
MPa MPa %  °C °C min
Mo
355 510 22 47 38 < 200 — —
MnMo
MoV 355 510 18 47 38 200 to 300 690 to 730 60
CrMo1 355 510 20 47 38 150 to 250 660 to 700 60
CrMoV1 435 590 15 24 21 200 to 300 680 to 730 60
CrMo2
400 500 18 47 38 200 to 300 690 to 750 60
CrMo2Mn
CrMo2L 400 500 18 47 38 200 to 300 690 to 750 60
CrMo5 400 590 17 47 38 200 to 300 730 to 760 60
CrMo9 435 590 18 34 27 200 to 300 740 to 780 120
CrMo91 415 585 17 47 38 250 to 350 750 to 760 180
e
250 to 350
CrMoWV12 550 690 15 34 27 or 740 to 780 120
e
400 to 500
Z Any other agreed mechanical properties
a
The gauge length is equal to five times the test piece diameter.
b
Only one single value lower than the minimum average is permitted.
c
The test piece shall be cooled in the furnace to 300 °C at a rate not exceeding 200 °C/h. The test piece may be removed from the
furnace at any temperature below 300 °C and allowed to cool in still air to room temperature.
d
Tolerance ± 10 min.
e
Immediately after welding the test piece shall be cooled down to 120 °C to 100 °C and kept at this temperature for at least 1 h.

 Table 1B — Symbols for tensile properties
(classification by tensile strength and chemical
composition)
Minimum
Tensile Minimum
Symbol yield
b
strength elongation
a
strength
MPa MPa %

49 400 490 to 660 20
55 470 550 to 700 18
62 540 620 to 760 15
69 610 690 to 830 14
a
  0,2 % offset (R ).
p0,2
b
The gauge length is equal to five times the test piece
diameter.
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ISO 24598:2007(E)
 Table 2B — Symbols for impact properties of
all-weld metal deposits (classification by
tensile strength and chemical composition)
Temperature for minimum average
impact energy of 27 J
Symbol
°C
Z No requirements

Y + 20
0 0
2 − 20
3 − 30
 4 − 40
4.4 Symbol for types of welding flux
The symbols for welding flux in accordance with ISO 14174 are given in Table 3.
Table 3 — Symbols for types of welding flux
Type of flux Symbol
Manganese-silicate MS
Calcium-silicate CS
Calcium-magnesium CG
Calcium-magnesium-basic CB
Calcium-magnesium-iron CI
Calcium-magnesium-iron-basic IB
Zirconium-silicate ZS
Rutile-silicate RS
Aluminate-rutile AR
Aluminate-basic AB
Aluminate-silicate AS
Aluminate-fluoride-basic AF
Fluoride-basic FB
Any other type Z
4.5 Symbol for the chemical composition of solid wire electrodes and of all-weld metal
deposits
The symbols in Table 4 indicate the chemical composition of the solid wire electrode, determined under the
conditions given in Clause 6.
The symbols in Table 5 indicate the chemical composition of the all-weld metal deposit obtained with the solid
wire electrode, or with the tubular cored electrode, and a particular flux.
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ISO 24598:2007(E)
4.6 Rounding-off procedure
For the purposes of determining compliance with the requirements of this International Standard, the actual
test values obtained shall be subjected to the rounding-off instructions given in ISO 31-0:1992, Annex B,
Rule A. If the measured values are obtained by equipment calibrated in units other than those of this
International Standard, the measured values shall be converted to the units of this International Standard
before rounding off. If an average value is to be compared to the requirements of this International Standard,
rounding off shall be done only after calculating the average. In the case where the testing standard cited in
the normative references of this International Standard contains instructions for rounding off that conflict with
the instructions of this International Standard, the rounding off requirements of the testing standard shall apply.
The rounded-off results shall fulfil the requirements of the appropriate table for the classification under test.
Table 4 — Chemical composition requirements for solid wire electrodes
Symbol for classification in Chemical composition
b
accordance with % (by mass)
tensile
chemical strength and
a
composition chemical f
C Si Mn P S Cr Ni Mo Cu V Other
a
composition
ISO 24598-A ISO 24598-B
0,08 0,05 0,80 0,45
Mo (1M3) to to to 0,0250,025 0,2 0,3 to 0,3 0,03 Nb: 0,01
0,15 0,25 1,20 0,65
0,05 0,65 0,45
c
(Mo) 1M3 to 0,25 to 0,0250,025 — — to 0,35 — —
0,15 1,00 0,65
0,08 0,05 1,30 0,45
i
MnMo (3M31) to to to 0,0250,025 0,2 0,3 to 0,3 0,03 Nb: 0,01
0,15 0,25 1,70 0,65
1,10 0,30
c, i
(MnMo) 3M31 0,18 0,60 0,0250,025 — — 0,35 — —
to to
1,90 0,70
0,05 1,65 0,45
c, i
4M3 to 0,20 to 0,0250,025 — — to 0,35 — —
0,17 2,20 0,65
1,70 0,30
c, i
4M31 0,18 0,60 to 0,0250,025 — — to 0,35 — —
2,60 0,70
0,08 0,10 0,60 0,30 0,50 0,25
MoV to to to 0,020 0,020 to 0,3 to 0,3 to Nb: 0,01
0,15 0,30 1,00 0,60 1,00 0,45
0,05 0,40 0,40 0,45
c
CM 0,10 0,025 0,025 — 0,35 — —
to to to to
0,30 0,80 0,75 0,65
0,30 0,30 0,30
c
CM1 0,15 0,40 to 0,025 0,025 to — to 0,35 — —
1,20 0,70 0,70
0,15 0,40 0,40 0,45 0,90
c
C1MH to to to 0,025 0,025 to — to 0,30 — —
0,23 0,60 0,70 0,65 1,20
0,08 0,05 0,60 0,90 0,40
(1CM)
CrMo1 to to to 0,020 0,020 to 0,3 to 0,3 0,03 Nb: 0,01
(1CM1)
0,15 0,25 1,00 1,30 0,65
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ISO 24598:2007(E)
Table 4 (continued)
Symbol for classification in Chemical composition
b
accordance with % (by mass)
tensile
chemical strength and
a
composition chemical f
C Si Mn P S Cr Ni Mo Cu V Other
a
composition
ISO 24598-A ISO 24598-B
0,07 0,05 0,45 1,00 0,45
c, d
(CrMo1) 1CM to to to 0,025 0,025 to — to 0,35 — —
0,15 0,30 1,00 1,75 0,65
0,30 0,80 0,40
c
(CrMo1) 1CM1 0,15 0,60 to 0,025 0,025 to — to 0,35 — —
1,20 1,80 0,65
0,28 0,55 0,45 1,00 0,40 0,20
c
1CMVH to to to 0,015 0,015 to — to 0,30 to —
0,33 0,75 0,65 1,50 0,65 0,30
0,08 0,05 0,80 0,90 0,90 0,10
CrMoV1 to to to 0,020 0,020 to 0,3 to 0,3 to Nb: 0,01
0,15 0,25 1,20 1,30 1,30 0,35
0,08 0,05 0,30 2,2 0,90
CrMo2 (2C1M) to to to 0,020 0,020 to 0,3 to 0,3 0,03 Nb: 0,01
0,15 0,25 0,70 2,8 1,15
0,05 0,05 0,40 2,25 0,90
(CrMo2)
c, d
2C1M to to to 0,025 0,025 to — to 0,35 — —
(CrMo2Mn)
0,15 0,30 0,80 3,00 1,10
0,30 2,20 0,90
(CrMo2)
c
2C1M1 0,15 0,35 to 0,025 0,025 to — to 0,35 — —
(CrMo2Mn)
1,20 2,80 1,20
0,08 0,30 2,20 0,90
c
2C1M2 to
...