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1、BRITISH STANDARD BS 4659:1989 Specification for Tool and die steels UDC 669.14.018.25:621.73.073:621.7.016.2 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 08:39:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4659:1989 This British Standard, having been prepared under the direction of the
2、Iron and Steel Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 31 January 1990 BSI 04-1999 BS 224 first published, July 1925 BS 224 first revision, May 1938 BS 4659 first published. February 1971 Combined revision January 1990 The following
3、BSI references relate to the work on this standard: Committee reference ISM/31 Draft for comment 88/36735 DC ISBN 0 580 17890 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Iron and Steel Standards Policy Committee (ISM/-) to Technica
4、l Committee ISM/31, upon which the following bodies were represented: British Chain Manufacturers Association British Coal Corporation British Forging Industry Association British Industrial Fasteners Federation British Steel Industry Cold Rolled Sections Association Department of Trade and Industry
5、 (National Physical Laboratory) Engineering Industries Association Federation of British Engineers Tool Manufacturers Institution of Production Engineers Lloyds Register of Shipping Ministry of Defence National Association of Steel Stockholders Road Vehicle Spring Society Society of Motor Manufactur
6、ers and Traders Limited Stainless Steel Fabricators Association of Great Britain Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 08:39:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4659:1989 BSI 04-1999i Contents Page Commit
7、tees responsibleInside front cover Forewordii 1Scope1 2Definition1 3Information to be supplied by the purchaser1 4Chemical composition1 5Freedom from defects1 6Depth of functional decarburization for tool steels1 7Dimensional tolerances1 8Hardness2 9Metallurgical condition of steel on delivery2 10Ma
8、rking2 Appendix A Options9 Appendix B Recommended temperatures for annealing, hardening and tempering9 Appendix C Typical carbide distributions11 Figure 1 Maximum depth of decarburization for hot-rolled rounds and flats7 Figure 2 Maximum depth of decarburization for forged rounds and flats8 Figure 3
9、 Typical carbide distribution in high speed tool steel ( 100 magnification)11 Figure 4 Typical carbide distribution in high speed tool steel ( 100 magnification)12 Figure 5 Typical carbide distribution in high speed tool steel ( 100 magnification)12 Figure 6 Typical carbide distribution in high spee
10、d tool steel ( 100 magnification)13 Figure 7 Typical carbide distribution in high carbon high chromium cold work tool steel ( 100 magnification)13 Figure 8 Typical carbide distribution in high carbon high chromium cold work tool steel ( 100 magnification)14 Figure 9 Typical carbide distribution in h
11、igh carbon high chromium cold work tool steel ( 100 magnification)14 Figure 10 Typical carbide distribution in high carbon high chromium cold work tool steel ( 100 magnification)15 Table 1 Chemical composition, annealed hardness and hardness after heat treatment3 Table 2 Permitted deviations in chem
12、ical composition on product analysis5 Table 3 Dimensional tolerances and maximum depth of functional decarburization for hot-rolled rounds and flats6 Table 4 Dimensional tolerances and maximum depth of functional decarburization for hot-rolled sheet and strip6 Table 5 Dimensional tolerances and maxi
13、mum depth of functional decarburization for forged rounds and flats6 Table 6 Dimensional tolerances for machined, ground or drawn rounds and coiled rod6 Table 7 Recommended heat treatment temperatures and cooling media for tool steels10 Publications referred toInside back cover Licensed Copy: sheffi
14、eldun sheffieldun, na, Fri Dec 01 08:39:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4659:1989 ii BSI 04-1999 Foreword This British Standard has been prepared under the direction of the Iron and Steel Standards Policy Committee and is a combination and revision of BS 4659:1971 and BS 224:1938 wh
15、ich are withdrawn. This revision retains one die steel (BH224/5) from BS 224:1938 and introduces two grades of steel for plastics moulding. The dimensional and decarburization requirements have been revised as a result of experience gained in the application of BS 4659:1971. The tool steels have bee
16、n grouped into three types, i.e. high speed, hot work and cold work. The designations adopted for the various types of tool steel are those adopted by the American Iron and Steel Institute, except that in all cases this letter has been preceded by the letter B. Thus, BT designates high speed tool st
17、eels of tungsten grades. The grades standardized are those which are most commonly used. In the case of high speed steel and high carbon high chromium cold work tool steel, photomicrographs illustrate typical carbide distribution. These photomicrographs may be used to define the degree of permissibl
18、e carbide segregation. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages T
19、his document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Li
20、censed Copy: sheffieldun sheffieldun, na, Fri Dec 01 08:39:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4659:1989 BSI 04-19991 1 Scope This British Standard specifies chemical composition, tolerances on dimensions and maximum depths of functional decarburization and recommends heat treatment tem
21、perature ranges for tool and die steels in the form of: a) hot-rolled rounds and flats; b) coiled rod; c) machined, ground or drawn rounds or coiled rod; d) sheet and strip; e) forgings; f) forged bar. NOTE 1The term “hot-rolled coil” used in BS 4659:1971 has been replaced by “coiled rod”. NOTE 2The
22、 titles of the publications referred to in this standard are listed on the inside back cover. 2 Definition For the purposes of this British Standard the following definition applies. functional decarburization the functional depth of decarburization is the last depth at which the hardness is not les
23、s than the minimum value specified in the hardened and tempered condition 3 Information to be supplied by the purchaser 3.1 General The purchaser shall state the grade and form of steel required at the time of enquiry and order. 3.2 Options A number of options are specified in Appendix A. In the eve
24、nt that the purchaser does not indicate his wish to implement any of these options and specify his requirements at the time of the enquiry and order, the manufacturer shall supply in accordance with the base specification. 4 Chemical composition 4.1 Composition ranges The chemical composition of the
25、 steel, based on cast analysis, shall comply with the appropriate grade of material in Table 1. 4.2 Residual elements Elements not quoted in the relevant steel composition shall not be intentionally added to the steel. 4.3 Product analysis and permitted deviations NOTEThe product analysis may differ
26、 from the cast analysis due to heterogeneity arising during casting and solidification. The permitted deviations from the specified range on product analysis shall be as given in Table 2. The deviation may occur either above or below the individual element ranges but shall not apply both above and b
27、elow the specified range for any one element in any one cast of steel. Test specimens for product analysis shall be taken in accordance with the appropriate method of BS 6200-3 or Handbook 19. 4.4 Dispute Where results are disputed, samples shall be taken and tested in accordance with the appropriat
28、e Parts of BS 6200 or Handbook 19. 5 Freedom from defects The steel shall be free from harmful defects such as piping, bursts, excessive porosity, gross inclusions from laps or other surface or subsurface defects and from ingotism and excessive banding. Carbides shall be spherodized and continuous c
29、arbide networks shall be absent. See also the options listed in A.4, A.5, A.6, A.7 and A.8. 6 Depth of functional decarburization for tool steels The depth of functional decarburization shall comply with Table 3 (see Figure 1) for hot-rolled rounds and flats, Table 4 for hot-rolled sheet and strip a
30、nd Table 5 (see Figure 2) for forged rounds and flats when measured in accordance with BS 6617-1 or BS 6617-2. Steel ordered with a machined or ground finish shall be free from decarburization. Where no value is specified the hardness at the functional depth of decarburization shall be within 5 % of
31、 the hardness midway between the axis and the surface of the section. In cases of dispute, the sample shall be hardened and tempered in a neutral salt bath in accordance with the temperature ranges given in Appendix B and shall meet the hardness requirements given in Table 1. 7 Dimensional tolerance
32、s 7.1 Hot-rolled rounds and flats The dimensional tolerances shall be as given in Table 3. Ovality shall be within dimensional tolerances. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 08:39:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4659:1989 2 BSI 04-1999 7.2 Coiled rod The dimensio
33、nal tolerances shall be mm for coiled rod 3 mm to 14 mm diameter. 7.3 Machined ground or drawn rounds and coiled rod The dimensional tolerances shall be as given in Table 6. Ground bar and drawn coiled rod shall be supplied to class 1 and machined to class 2 (see Table 6) dimensional tolerances. See
34、 also A.9. 7.4 Hot rolled sheet and strip The dimensional tolerances shall be as given in Table 4. 7.5 Forged rounds and flats The dimensional tolerances shall be as given in Table 5. 8 Hardness 8.1 Annealed hardness The hardness of the steel after annealing shall not exceed the maximum requirement
35、for the appropriate grade given in Table 1 when measured in accordance with BS 240. 8.2 Hardness after hardening and tempering of the steel When subjected to hardening and tempering by heat treatment the hardness of the steel shall achieve the minimum requirement for the appropriate grade given in T
36、able 1 when measured in accordance with BS 427. NOTERecommended temperatures for annealing, hardening and tempering and recommended quenching media are given in Appendix B. 9 Metallurgical condition of steel on delivery The steel shall be in the annealed condition with the exception of BP20 which is
37、 normally delivered in the hardened and tempered condition. NOTEDrawn rod or bar can be expected to have received a certain amount of cold work and the hardness will become greater as the size becomes smaller. The hardness of steel in this form can be expected to be up to 45 HB numbers higher than t
38、he maximum annealed hardness values given in Table 1. 10 Marking Bars shall be marked either individually or, when the bars are securely bundled, on a metal tag attached to each bundle with the following information. a) The number of this British Standard, i.e. BS 4659:19891). b) The grade of steel,
39、 e.g. BM1. + 0.30 0.15 1) Marking BS 4659:1989 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is therefore solely the responsibili
40、ty of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 08:39:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4659:1989 BSI 04-19993 Table 1 Chemical
41、 composition, annealed hardness and hardness after heat treatment Designation CSiMnPACrMoNiCoCuSnVWAnnealed hardness (max.)a Hardness after heat treatment (min.) min. max. min. max. min. max. min. max. min. max. min. max. min.max. min. max. min. max. min. max. min. max. min. max.min.max. High speed
42、tool steels %HBHV BM10.750.850.400.400.035 0.035 3.754.58.09.00.40 1.0b 0.200.051.01.251.02.0241823 BM20.820.920.400.400.035 0.035 3.754.54.755.50.40 1.0b 0.200.051.752.056.06.75248836 BM41.251.400.400.400.035 0.035 3.754.54.255.00.40 1.0b 0.200.053.754.255.75 6.5255849 BM151.451.600.400.400.035 0.0
43、35 4.55.02.753.25 0.404.55.50.200.054.755.256.25 7.0277869 BM350.850.950.400.400.035 0.035 3.754.54.755.25 0.404.60 5.200.200.051.752.156.06.75269869 BM421.01.100.400.400.035 0.035 3.54.259.010.00.407.58.50.200.051.01.31.02.0269897 BT10.700.800.400.400.035 0.035 3.754.50.70 0.40 1.0b 0.200.051.01.25
44、17.518.5255823 BT40.700.800.400.400.035 0.035 3.754.51.00.404.55.50.200.051.01.2517.518.5277849 BT50.750.850.400.400.035 0.035 3.754.51.00.409.010.00.200.051.752.0518.519.5290869 BT60.750.850.400.400.035 0.035 3.754.51.00.40 11.25 12.25 0.200.051.251.7520.021.0302869 BT151.401.600.400.400.035 0.035
45、4.255.01.00.404.55.50.200.054.755.2512.013.0290890 BT210.600.700.400.400.035 0.035 3.54.250.70.40 1.0b 0.200.050.400.6013.514.5255798 BT421.251.400.400.400.035 0.035 3.754.52.753.50 0.409.010.00.200.052.753.258.59.5277912 Hot work tool steels BH100.300.400.75 1.10 0.400.035 0.035 2.83.22.652.95 0.40
46、0.200.050.300.50229 BH10A0.300.400.75 1.10 0.400.035 0.035 2.83.22.652.95 0.402.83.20.200.050.301.10241 BH110.320.420.85 1.15 0.400.035 0.035 4.755.251.251.75 0.400.200.050.300.50229 BH120.300.400.85 1.15 0.400.035 0.035 4.755.251.251.75 0.400.200.050.501.25 1.75229 BH130.320.420.85 1.15 0.400.035 0
47、.035 4.755.251.251.75 0.400.200.050.901.10229 BH190.350.450.40 0.400.035 0.035 4.04.50.45 0.404.04.50.200.052.02.44.04.5248 BH210.250.350.40 0.400.035 0.035 2.253.250.60 0.400.200.050.408.510.0235 BH21A0.200.300.40 0.400.035 0.035 2.253.250.60 2.02.50.200.050.508.510.0255 Hammer die steel Ab 444/447
48、 A 401/429 B 363/388 C 331/352 BH224/50.490.570.350.70 1.000.030 0.025 0.701.100.250.401.25 1.800.200.05D 302/321 E 269/293 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 08:39:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4659:1989 4 BSI 04-1999 Table 1 Chemical composition, annealed hardness and hardness after heat treatment Designation CSiMnPSCrMoNiCoCuSnVW Annealed hardness Hardness after heat treatment min. max. min. max. min. max. min. max. min. max.min.max. min. max. min. max. min. max. min. max. min. max. min. max. min. max.(max.)a (min.) Cold work tool steels %