|
Ref. NO. : ISO/R 1052-1%9(E)
UDC 669.14 : 621
IS0
FOR STAND AR D IZATl O N
INTERN AT1 ON A L ORGAN I Z AT I O N
IS0 RECOMMENDATION
R 1052
STEELS FOR GENERAL ENGINEERING PURPOSES
1 st EDITION
April 1969
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
---------------------- Page: 1 ----------------------
BRIEF HISTORY
The IS0 Recommendation R 1052, Steels for general engineering purposes, was drawn up by Technical
Committee ISO/TC 17, Steel, the Secretariat of which is held by the British Standards Institution (BSI).
Work on this question led, in 1967, to the adoption of a Draft IS0 Recommendation.
In December 1967, this Draft IS0 Recommendation (No. 1357) was circulated to all the IS0 Member
Bodies for enquiry. It was approved, subject to a few modifications of an editorial nature, by the following
Member Bodies :
Australia Hungary South Africa, Rep. of
Austria India Spain
Belgium Israel Sweden
Canada Italy Switzerland
Chile Japan Turkey
Colombia Korea, Rep. of U.A.R.
Czechoslovakia Netherlands United Kingdom
Denmark New Zealand U.S.A.
Finland Norway U.S.S.R.
France Poland
Germany Romania
One Member Body opposed the approval of the Draft
Brazil
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council, which decided,
in April 1969, to accept it as an IS0 RECOMMENDATION.
-3-
---------------------- Page: 2 ----------------------
ISO/R 1052-1969(E)
IS0 Recommendation R 1052 April 1969
STEELS FOR GENERAL ENGINEERING PURPOSES
1. SCOPE
1.1 This IS0 Recommendation covers a group of non-rimming steels forming a supplement to those
specified by IS0 Recommendation K 630, Strucrurul steels, and not intended to replace them.
1.2 Steels specially intended for forging. tor welded constructions, for heat treatment, and for the
construction of boilers and pressure vessels are not dealt with in this IS0 Recommendation; they
are dealt with in special IS0 Recommendations.
TABLE' 1 Grades and qualities
1 Grades Qualities
Fe 50 X X
Fe 60 X X
Fe 70 X
TABLE 2 ~~ Chemical composition and mechanical properties
Chemical composition Tensile properties
Grades Qualities
Ladle Product* Re I Rm I A OIo
1
X X X X 3
Fe 50
2
X X X X X
1 X X X
Fe 60 1
2
Fe 70 2 X X X X
1 X
*
Verifications of the chemical composition on the product are not carried out unless specified on the
order.
1-
---------------------- Page: 3 ----------------------
ISO/R 1052-1969 (E) .d
2. CHARACTERISTICS OF GRADES AND QUALITIES
2.1 Chemical composition
2.1.1 Ladle analysis. The composition limits for analysis carried out on the ladle sample are given in
Table 3 and are maximum values.
2.1.2 Product analysis. This analysis can be requested by the purchaser, in which case it should be
specified on the order. The composition limits are given in Table 3 and are maximum values.
The chemical analysis should be carried out on chips taken in such a manner as to represent the
whole section of the product.
TABLE 3 - Chemical composition
~~~
s max.
P max.
Grades Qualities
Ladle Product
Ladle Pro duct
0.090 1 :::: 1 0.065
Fe 50 1 1 1
0.05 0.055 0.055
0.090 0.065
0.055 0.055
Fe 70 I 2 0.05 0.055 0.05 I 0.055
2.2 Mechanical properties
The mechanical properties should be as stated in Table 4 when they are determined on test pieces
obtained according to the requirements of clause 4.4.
TABLE 4 - Mechanical properties
I
A min *
Re kgf/mm2 min
WO =5.65
~
Rm
Grades Qualities . kgf/mm2 -
I eG16 16 1 30 29 28 50 to 62 20 19
Fe 50
2 30 29 28 50 to 62 21 20
1 34 33 32 60 to 72 15 14
Fe 60
2 34 33 32 60 to 72 16 15
Fe 70 2 37 36 35 70 to 85 11 10
*
For transverse test pieces, for plates and for fiats wider than 400 rnm, these values may be reduced by two
points.
NOTE. - The properties required for products thicker than 63 mm should be stated on the order.
-6-
---------------------- Page: 4 ----------------------
ISO/R 1052-1969 (E) I
3. MANUFACTURE
3.1 Process of manufacture
The process of manufacture may be specified on the order after agreement between the purchaser and
the supplier.
When the process of manufacture is not stated on the order, it is left to the choice of the producer; it
should, however, be stated on his advice note to the purchaser (see Annex and IS0 Recommendation
R 404, General technical delivery requirements for steel).
3.2 Defects
lnternal or surface defects not prejudicial to the uses or proper application of the product should not
be ground for rejection or claim.
Less important defects can be removed by the producer by grinding, provided that the thickness is not
reduced locally by more than 4 (with a maximum of 3 mm) in relation to its nominal value. For
but not exceeding 7 the agreement of the purchaser or his
reductions greater than 4
representative is necessary.
4. INSPECTlON REQUIREMENTS
Rolled products covered by this IS0 Recommendation should be the subject of a technical inspection which
will involve only the chemical composition and mechanical properties defined in Tables 3 and 4. The verifi-
cations of chemical composition on the product are only carried out if required by the order.
4.1 inspection unit
If inspection is required by the order, the inspection unit is drawn from the following :
(a) the batch*;
(b) the cast.
The method of batching should be stated on the order.
The inspection unit is
20 t or fraction thereof for inspection by batches;
(a)
40 t or fraction thereof for inspection by cast.
(b)
Number and nature of tests
4.2
For each inspection unit or thickness range as shown in Table 4, a series of tests is carried out
comprising
- 1 tensile test (or 2, in conformity with clause 4.3 (b)),
and, if specified on the order,
- 1 product analysis.
*
A batch is defined as the product of one or several casts of similar quality and grade rolled into one class of product and
submitted for inspection at the same time.
- 'I -
---------------------- Page: 5 ----------------------
.I
ISO/R 1052-1969 (b)
4.3 Selection of test samples for tensile testing
The purchaser or his representative may choose the products from which are selected the test samples
for the verification of the properties.
I
In the absence of a
...