《ISO-683-11-1987.pdf》由会员分享，可在线阅读，更多相关《ISO-683-11-1987.pdf（21页珍藏版）》请在三一文库上搜索。
1、INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEYHAPOHAR OPrAHH3AMR l-IO CTAHAPTMBAl#lH Heat-treatable steels, alloy steels and free-cuitjng steels - Part 11: Wrought case-hardening steels Aciers pour traitement thermique, aciers e
2、lii b) if a surface condition other than “hot worked” or a special surface quality is required : - the surface condition (see table 2) and - the surface quality (see 5.6); c) a description of the steel, comprising 1) a reference to this part of IS0 683, 2) the designation of the steel type given in
3、table 3 and, where appropriate, the symbols for the harden- ability grade (see 5.2.3 and tables 5 and 6). 3) if a heat treatment condition other than the un- treated condition is required, the symbol for this other condition (see table 1, column 3), 4) if a document is required, the symbol for the r
4、equired type of document (see table 9). 5) if any supplementary requirement shall be complied with, the symbol and, where necessary, the details of this supplementary requirement (see annex A). Hot-rolled round bars, according to IS0 1035/l, with a nominal diameter of 40.0 mm, a nominal length of 8
5、000 mm, with a diameter tolerance of f 046 mm (= class S of IS0 1035/4), length tolerance of + ya, mm I= class l2 of IS0 1035/4), all other tolerances as given in IS0 1035/4, for normal cases. Surface blast cleaned (symbol BC, see table 2). Steel according to this part of IS0 683, type 26 MnCr 5 (se
6、e table 31, heat treatment condition : annealed (symbol A, see table 1), with an inspection certificate of type IC (see table 9) and ultrasonically tested (supplementary requirement specified in clause A.3 in annex A) in accordance with test sheet xy. Designation Rounds : IS0 1035/l - 40,O S x 8 Ooo
7、 l2 Surface : BC Steel : IS0 683/11 - 20 MnCr 5 - A - IC - S3 Details : for S3, see test sheet xy 5 Requirements 5.1 Manufacturing process 5.1.1 The manufacturing process of the steel and of the products is, with the restrictions given by the requirements in 5.1.2 to 5.1.4, left to the discretion of
8、 the manufacturer. 5.1.2 Deoxidation All steels shall be fully killed. 5.1.3 Heat-treatment and surface condition at delivery 5.1.3.1 Normal condition at delivery Unless otherwise agreed at the time of enquiry and order, the products shall be delivered in the untreated, i.e., as hot- worked, conditi
9、on. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 06:21:52 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 553-11 : 1957 (El 5.1.3.2 Particular he
10、at-treatment condition If so agreed at the time of enquiry and order, the products shall be delivered in one of the heat-treatment conditions given in table 1, lines 3 to 6. 5.1.3.3 Particular surface conditions If so agreed at the time of enquiry and order, the products shall be delivered in one of
11、 the particular surface conditions given in table 2, lines 3 to 6. 5.1.4 Cast separation The steels shall be delivered separated by casts. 5.2 Chemical composition, hardness, hardenability and mechanical properties 5.2.1 Table 1 gives a survey on combinations of usual heat- treatment conditions at d
12、elivery, product forms and re- quirements according to tables 3 to 7 (chemical composition, hardenability, maximum hardness, hardness range). 5.22 Where the steel is not ordered to hardenability re- quirements - i.e. where the steel type designations of table 3 and not the designations given in tabl
13、e 5 or 6 are applied - the requirements for chemical composition and hardness cited in table 1, column 9, apply as appropriate for the particular heat- treatment condition. In this case the values of hardenability given in table 5 are for guidance purposes only. 5.2.3 Where the steel is, by using th
14、e designations given in table 5 or 6, ordered to normal (see table 5) or to narrowed (see table 6) hardenability requirements, the values of hardenability given in table 5 or 6 respectively apply in addition to the re- quirements cited in table 1, column 9 (see footnote 2 to table 3). 5.2.4 Mechanic
15、al properties for reference test bars in the simulated case-hardened condition are given in table 10 for guidance. 5.3 Technological properties 5.3.1 Machinability All steels are machinable in the conditions “annealed to maximum hardness requirements” and “treated to improve machinability”. Where im
16、proved machinability is required, the grades with a specified sulfur range should be ordered. (See also table 1, line 6.1 5.3.2 Shearability 5.3.2.1 Under suitable shearing conditions (avoiding local stress peaks, preheating, application of blades with a profile adapted to that of the product, etc.)
17、 all steels are shearable in the condition “annealed to maximum hardness requirements”. 5.3.2.2 The steel types 20 MnCr 5, 20 MnCrS 5, 15 NiCr 13, 17 NiCrMo 6 and 18 CrNiMo 7, are, under suitable conditions, also shearable when delivered in the condition “treated to improve shearability” with the ha
18、rdness requirements given in table 7. 5.3.2.3 The unalloyed steels and the steels 20 Cr 4, 20 CrS 4, 16 MnCr 5,16 MnCrS 5,18 CrMo 4,18 CrMoS 4,20 NiCrMo 2, and 20 NiCrMoS 2 are, under suitable conditions, shearable when delivered in the untreated condition. 5.4 Structure 5.4.1 Unless otherwise agree
19、d, the steel when tested in accordance with one of the methods described in IS0 643 shall show an austenitic grain size of 5 and finer. The grain structure shall be considered satisfactory if 70 % is within the specified size limits. In case the verification of the fine grain structure is specified,
20、 the method for determination of grain size according to IS0 643 and the testing conditions shall be agreed at the time of enquiry ahd,order. For coarse grain steel, see annex A, clause A. 1. 5.4.2 For the non-metallic inclusion content see annex A, clause A.2. 5.5 Internal soundness The steel shall
21、 be free from internal defects likely to have an adverse effect (see annex A, clause A.3). 5.6 Surface qua 5.8.1 All products shall have a workmanlike finish. 5.6.2 Minor surface discontinuities which may occur under normal manufacturing conditions, such as scores originating in the case of black st
22、eel from rolled-in scale, are not to be re- garded as defects. 5.6.3 As long as no International Standard on the surface quality of steel products is available, detailed requirements referring to this characteristic shall, where appropriate, be agreed at the time of enquiry and order. NOTES 1 For ba
23、rs and wire rod included in this part of IS0 683, a separate International Standard on surface quality is in consideration. 2 Bars and wire rod for cold heading and cold extrusion are covered fully by IS0 4954. 3 It is more difficult to detect and eliminate surface discontinuities from coiled produc
24、ts than from cut lengths. This should be taken into account when agreements on surface quality are made. 4 For hot-rolled plates, the requirements for surface finish are specified in IS0 7788. 5.6.4 Removal of surface discontinuities by welding is not permitted. Pending publication of a separate Int
25、ernational Standard, the kind and permissible depth for removal of surface disconti- nuities should, where appropriate, be agreed at the time of enquiry and order. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972
26、545001 Not for Resale, 04/19/2007 06:21:52 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 583-11 : 1987 (E) 5.7 Shape, dimensions and tolerances The shape, dimensions and tolerances of the products shall comply with the requirements agreed at the time of enquiry and or
27、der. The agreements shall, as far as possible, be based on corresponding International Standards, otherwise on suitable national standards. NOTE - The following International Standards cover dimensions and/or tolerances for products included in this pan of IS0 563 : - for bars: IS0 1035 parts 1 to 4
28、 - for plates (except for wide flats) : IS0 7452 (see note in clause 2). 6 Inspection, testing and conforming of products 6.1 Inspection and testing procedures and types of documents 6.1.1 Table 9 gives a survey of the inspection procedures and the type of documents of IS0 494 which may be agreed at
29、 the time of enquiry and order for deliveries according to this part of IS0 663. 6.1.2 If in accordance with the agreements at the time of enquiry and order a test report (TR) is to be provided, this shall cover a) the statement that the material complies with the requirements of the order and b) th
30、e results of the cast analysis for all elements specified for the steel type supplied. 6.1.3 If in accordance with the agreements in the order an inspection certificate (IC or ICP) or an inspection report (IR) (see table 9) is to be provided, the specific inspections and tests described in 6.2 shall
31、 be carried out and their results shall be certified in the document. In addition the document shall cover a) for all elements specified for the steel type concerned, the results of the cast analysis given by the manufacturer; b) the results of all inspections and tests ordered by sup- plementary re
32、quirements (see annex AI; c) the symbol letters or numbers relating the test cer- tificates, the test pieces and products to each other. 6.2 Specific inspection and testing 6.2.1 Verifications of the hardenability and hardness 6.2.1.1 For steels being ordered without hardenability requirements, i.e.
33、 without the symbol H, HH or HL in the designation, the hardness requirements given for the relevant heat-treatment condition in table 1, column 9, sub-clause 2, shall be verified. For steels being ordered with the symbol H, HH or HL in the designation (see table 5 and 61, unless otherwise agreed, o
34、nly the hardenability requirements according to table 5 or 6 shall be verified. 6.2.1.2 The amount of testing, the sampling conditions and the test methods to be applied for the verification of the requirements shall be in accordance with the prescriptions in table 11. 6.2.2 Visual and dimensional i
35、nspection A sufficient number of products shall be inspected to ensure compliance with the specification. 6.2.3 Retests 6.2.3.1 Where for one or more test units one or more tests give unsatisfactory results, the manufacturer has the choice of withdrawing the test units concerned (for example for re-
36、 treatment or sorting in accordance with IS0 404) or of retaining them. If they are retained, retests shall be carried out according to the following rules. 6.2.3.2 If - as in the case of product analysis (see annex A, clause A.41 - only one test of the type concerned was carried out on the sample c
37、oncerned and gave the unsatisfactory result, two new tests of the same type shall be carried out. 6.2.3.3 If the test unit consists of more than one product and if the product from which the unsatisfactory test result stems is not withdrawn from the test unit, one of the two new tests shall be made
38、on test pieces taken from the sample or product originally tested. 6.2.3.4 All retests shall give satisfactory results. Otherwise the test unit concerned shall be rejected. 7 Marking The manufacturer shall mark the products or the bundles or boxes containing the products in a suitable way, so that t
39、he identification of the cast, the steel type and the origin of the delivery is possible (see annex A, clause A.5). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 06:21:52 MDTNo
40、 reproduction or networking permitted without license from IHS -,-,- ISO683-11:1987(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 06:21:52 MDTNo reproduction or networking p
41、ermitted without license from IHS -,-,- ISO683-11:1987(E) Table 2 - Surface condition at delivery 1 2 3 4 5 6 7 8 9 10 x = In general applicable for semi-finished hammer 1 Surface condition et delivery Symbol products and drop Notes such as bars wire rods plates forgings blooms, kea 1.1 billets note
42、 3) Unless 2 otherwise As hot worked None or HW X1 X X X X agreed 3 Particular HW + pickled Pl X X X X X 4 conditions HW + blast cleaned SC X X X X X - supplied 3) 5 by agree HW + rough machined 2) - X X - X 0 ment Others I) The term “hot worked” includes in the case of semi-finished products also t
43、he continuously cast condition. 2) Until the term “rough machined is defined by, for example, machining allowances etc., the details are to be agreed at the time of enquiry and order. 3) In addition it may be agreed that the products are oiled or, where appropriate, limed or phosphated. 6 Copyright
44、International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 06:21:52 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO683-11:1987(E) Table 3 - Types of steel and chemical c
45、omposition (applicable to cast analysis) 1). 21. 3). 4) Type of steels c 10 I 1 c 15 E4 2 C15M2 2a -t- C 16 E4 3 Cl0M2 3a 20 Cr 4 20 CrS 4 20 NiCrMo 2 12 20 NiCrMoS 2 12a C% 0.07 to 0,13 0,12 to 0.18 0,12 to 0,18 0,15 to 0,21 0.12 to 0,18 0,17 to 0.23 0.14 to 0,20 0.15 to 0.21 Si %a Mn% P% max. S% C
46、r % MO% Ni % I I I I I I 0.15 too,40 1 030 to 0.60 1 0,035 1 0,035 max. 1 - - I - 0,15 to 0,40 030 to 0,80 0,035 0,035 max. - - - 0,020 to 0,040 0.15 to 0,40 0.80 to 0.90 0,035 0,035 max. - - - 0,020 to 0,040 0.15 max. to 0,40 0,59 to 090 0,035 0,035 0,90t01,20 - - 0,020 to 0,040 0.15 to o/Xl 190 to
47、 1.30 0.035 0,035 max. - - 0,020 to 0,040 0,80 to 1.10 0.15 to 0.40 1.10 to 1.40 I 0,035 I 0,035 max. 0,020 to 0,040 1.00 to 1.30 - 0,15 to 0.40 0,60 to 0,90 0,035 0,035 max. 0,020 to 0,040 0,90 to 1,20 0,15 to 0,25 - 0.15 to 0,40 0,35 to 0,65 0,035 0,035 max. 0,lB to 0.90 - 3,00 to 3,5tY 0,15 to O/
48、IO 0.65 to 0,95 0,035 0,035 max. I:= 0,020 to 0,040 0.30 to 0.65 0.15 to 0,25 040 to 0,70 0,15 to 0,40 0,60 to 0,90 0,035 0,035 max. 0,80 to 1.10 0.15 to 0.25 1.20 to 1.60 - 0,15 to o/l0 0.35 to 0,65 0,035 0,035 max. 1.50 to 190 025 to 0,35 1,40 to 1,70 1) Elements not quoted in this table should no
49、t be intentionally added to the steel without the agreement of the purchaser, other than for the purpose of finishing the heat. All reasonable precautions should be taken to prevent the addition, from scrap or other materials used in manufacture, of such elements which affect the hardenability. mechanical properties and applicability. 2) In the case of grades with