ISO 683-14:1973
(Main)Heat-treated steels, alloy steels and free-cutting steels — Part 14: Steels for hot-formed and heat-treated springs
Heat-treated steels, alloy steels and free-cutting steels — Part 14: Steels for hot-formed and heat-treated springs
Aciers pour traitement thermique, aciers alliés et aciers pour décolletage — Partie 14: Aciers pour ressorts formés à chaud et traités thermiquement
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INTERNATIONAL STANDARD 683/XIV
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION -MEXJlYHAF'OAHAII OPTAHW3ALlHR no CTAHllAFTW3AUHH .ORGANISATION INTERNATIONALE DE NORMALISATION
Heat-treated steels, alloy steels and free-cutting steels -
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Part 14 : steels for hot-formed and heat-treated springs
First edition - 1973-06-01
UDC 669.14/. 15.018.2 Ref. No. : IS0 683/XIV-1973 (E)
Descriptors : steels, alloy steels, unalloyed steels, heat treatable steels, springs (elastic), materials specifications.
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Price based on 13 pages
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FOREWORD
IS0 (the International Organization for Standardization) is a worldwide federation
(IS0 Member Bodies). The work of developing
of national standards institutes
International Standards is carried out through IS0 Technical Committees. Every
Member Body interested in a subject for which a Technical Committee has been set
up 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.
Draft International Standards adopted by the Technical Committees are circulated
to the Member Bodies for approval before their acceptance as International
Standards by the IS0 Council.
International Standard IS0 683/XIV was drawn up by Technical Committee
ISOflC 17, Steel, and circulated to the Member Bodies in March 1972.
It has been approved by the Member Bodies of the following countries :
Belgium Hungary Spain
Canada India Sweden
Czechoslovakia lreland Switzerland
Denmark Italy Thailand
Egypt, Arab Rep. of Netherlands Turkey
Finland Norway United Kingdom
France Romania U.S.S.R.
Germany South Africa, Rep. of
The Member Body of the following country expressed disapproval of the document
on technical grounds :
U.S.A.
O International Oiganization for Standardization, 1973
Printed in Switzerland
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IS0 683/XIV-1973 (E)
INTE RNATl ON AL STAN DARD
Heat-treated steels, alloy steels and free-cutting steels -
Part 14 : steels for hot-formed and heat-treated springs
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1 SCOPE AND FIELD OF APPLICATION steel shall be killed. When he
of the manufacturer, but the
so requests, the user shall be informed what steelmaking
Process is being used.
This International Standard gives specifications for the
grades of unalloyed and alloyed steels for hot-formed
springs, listed in Table 2 and intended for use in the
quenched and tempered condition. 3.2 Chemical composition, mechanical properties and
hardena bi lity
2 REFERENCES 3.2.1 Types of condition of delivery
The steels covered by this International Standard shall be
ISO/R 79, Brinell hardness test for steel.
ordered and delivered in accordance with Table 1. The type
of condition of delivery according to Table 1 shall be stated
IsO/R 80, Rockwell hardness tesi (B and c for
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at the time of enquiry and order.
ISO/R 82, Tensile testing of steel.
ISO/R 377, Selection and preparation of samples and test
pieces for wrought steel. 3.2.2 Chemical composition
ISO/R 404, General technical delivery reqUirments for
The chemical composition expressed by the cast analysis
steel.
shall be in accordance with Table 2.
ISO/R 642, Hardenability test by end quenching steel
(Jomin y test).
3.2.2.1 If ordered to conditions of delivery type 1 or 1 (c)
ISO/R 643, Micrographic determination Of the austenitic
(see Table 1). the Dermissible deviations given in Table 3,
grain size of steels.
between the limiting values specified in Table 2 and the
product analysis of products up to 160 mm (6.3 in)
diameter or equivalent dimensions, shall apply.
3 REQUIREMENTS
3.2.2.2 If ordered to condition of delivery types 2, 2 (c), 4
and 4 (c), the mechanical properties or hardenability
3.1 Production processes
specified in Tables 5 and 7 shall be the governing criteria
for acceptance. In Such cases, the analysis may deviate
Unless otherwise agreed in the order, the processes used in
Slightly from the values shown in Table 2.
making the steel and the product are left to the discretion
1
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IS0 683/XIV-1973 (E)
Types of condition of delivery')
Requirements
1 l(c) 2 2(c) 4 4(c)
Chemical composition xxxxxx
-- xx--
Hardenability
Hardness in the subcritically
annealed condition - x- x-x
Mechanical properties on the
reference section of 10 mm
----
diameter?) xx
1) The numbers indicating the type of condition of delivery follow
a coordinated series of numbers throughout all relevant IS0
pub1 ications.
2) See footnote 2 to Table 5.
h
1
P% S% 6%
Type
C% Si % Mn % Cr % Mo 50 V%
of steel max. max. min.
1 0.72 to 0.85 0.15 to 0.40 0.50 to 0.80 0.050 0,050
2 0.72 to 0.85 0.15 to 0.40 0,50 to 0.80 0,035 0,035
3 0.43 to0.50 1.50 to 2,00 0.50 to 0.80 0.040 0,040
4 0.47 to 0.55 1.50 to 2,OO 0.50 to 0.80 0,040 0,040
5 0.52 to0.60 1.50 to 2.00 0.60 to0.90 0,040 0.040
6 0,57 to0.64 1.70to 2.20 0.70 to 1,00 0,040 0.040
7 0,57 to 0,64 1,JOto 2.20 0.70 to 1.00 0.040 0.040 0.25 to 0.40
8 0.52 to 0.59 0,15 to 0.40 0.70 to 1.00 0,035 0,035 0.60 to 0.90
9 0.56 to 0.64 0.15 to 0,40 0,JO to 1.00 0,035 0,035 0.60 to 0.90
10 0.56 to 0,64 0,15 to 0,40 0.70 to 1.00 0,035 0,035 0.0005 0.60 to 0,90
11 0.42 to 0.50 1.30 to 1.70 0.50 to 0.80 0,035 0,035 0.50 to O. 75 O, 15 to 0.30
12 0.56 to 0.64 0.15 to 040 0,JO to 1.00 0,035 0.035 O, JO to 0.90 0.25 to 0.35
0.10 to 0.20
13 0,48 to 0.55 0,15 to 0.40 0,JOto 1.00 0.035 0.035 0.90 to 1,20
0.07 to 0.12
14 0.48 to 0.56 0.15 toO,40 0.70 to 1.00 0,035 0,035 0.90 to 1,20 0.15 to 0.25
1) Elements not quoted in the table shall not be intentionally added to the steel without the agreement of the purchaser, other than for the
purpose of finishing the heat. All reasonable precautions shall be taken to prevent the addition, from scrap or other materials used in
manufacture, of such elemeyits which affect the hardenability, mechanical properties and applicability.
TABLE 3 - Permissible deviations between specified analysis and product analysis
I I PermissiMe deviations')
Type of steel
S% Cr % Mo % V%
Si % Mn % P%
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+ 0,005 + 0.005
land2 f 0.04 f 0.03 f 0.04
f 0.02 f 0.05 f 0.04 + 0,005 + 0,005
3 to 5
6 f 0,02 f 0.05 f 0.04 + 0,005 + 0,005
7 f 0.02 f 0.05 f 0.04 + 0,005 + 0,005 f 0.04
8.9d 10 f 0.02 f 0.03 f 0.04 + 0,005 + 0,005 i 0.05
11 t 0.02 i 0.05 f 0.04 + 0,005 + 0,005 f 0.05 f 0.03
f 0.03
12 f 0.02 f 0.03 f 0.04 + 0,005 + 0,005 f 0.05
f 0,02
13 f 0.02 f 0,03 f 0,04 + 0.005 + 0,005 i 0.05
f 0,03 f 0.02
14 f 0.02 f 0.03 f 0.04 + 0,005 + 0,005 f 0.05
1 ) f means that in one cast and in more than one product analysis the deviation may occur over the upper value or under the lower value of
the specified range in Table 2 but not both at the same time.
2
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IS0 683/XIV-1973 (E)
3.2.3 Mechanical properties 4 TESTING
3.2.3.1 With regard to the mechanical properties in 4.1 Number of sample products
relation to the martensite content in the core (see footnote
to Table 4), the application of the steels shall be restricted
4.1 .I Chemical composition
to the thickness ranges given in Table 4.
The cast analysis is given by the manufacturer. If a product
analysis is required by the purchaser, at least one sample
product shall be taken from each cast.
TABLE 4 - Recommended maximum dimensions
for flats and rounds
4.1.2 Mechanical properties and hardenability
Values in millimetres
4.1.2.1 For material supplied according to types of
condition of delivery 1 (c), 2 (c) and 4 (c) of Table 1 with
guarantee of the maximum hardness in the subcritically
Flats thickness Rounds diameter
annealed condition, one sample product shall be taken from
each cast and from each heat treatment batch for testing in
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accordance with the requirements of Table 6. If the
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product is continuously heat treated, one sample product
14 20
for each 25 t or part thereof for the carbon steels 1 and 2,
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for each 15 t or part thereof for the alloy steels 3 to 14, but
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at least one sample product for each cast, shall be taken.
14 20
16 24
18 28
4.1.2.2 For material supplied according to types of
22 33
condition of delivery 4 and 4 (c) of Table 1 with guarantee
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of mechanical properties on the heat-treated reference
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section (10 mm diameter), one sample product shall be
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taken from each cast for testing in accordance with Table 5.
27 40
40 60 For continuously heat-treated products, the last sentence of
4.1.2.1 also applies.
1) The maximum dimensions given above are based on a martensite
content of about 80 % in the centre of the quenched section.
4.1.2.3 For material supplied according to types of
condition of delivery 2 and 2 (c) of Table 1 with guarantee
in the end-quench test, one sample
of the hardenability
3.2.3.2 If specified (types of condition of delivery 4 and product shall be taken from each cast for testing in
4 (c) - see Table 1). the mechanical properties of accordance with the requirements of Table 7.
longitudinal test pieces of 10 mm diameter, which are heat
treated in accordance with the data for the reference
4.2 Samples and test pieces
condition in T
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