1、Designation: A 427 02Standard Specification forWrought Alloy Steel Rolls for Cold and Hot Reduction1This standard is issued under the fixed designation A 427; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers homogeneous wrought hard-ened alloy steel rolls for use in cold or hot reduction of flatrolled ferrous
3、 and nonferrous products.2. Referenced Documents2.1 ASTM Standards:A 788 Steel Forgings, General Requirements2A 956 Leeb Hardness Testing of Steel Products2E 18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic Materials3E 92 Test Method for Vickers Hardness of Metallic
4、 Mate-rials3E 140 Hardness Conversion Tables for Metals3E 448 Practice for Scleroscope Hardness Testing of MetallicMaterials33. Ordering Information3.1 The purchaser shall specify in the inquiry, contract, ororder the complete dimensions, hardness range, surface finish,and use. Any other requirement
5、s shall also be specified.3.2 Material supplied to this specification shall conform tothe requirements of Specification A 788, which outlines addi-tional ordering information, manufacturing requirements, test-ing and retesting methods and procedures, marking, certifica-tion, product analysis variati
6、ons, and additional supplementaryrequirements.4. Process4.1 The steel shall be made by the electric-furnace process.Additional refining by vacuum arc remelt or electroslag ispermitted.5. Manufacture5.1 The forged rolls shall receive their hot mechanical workunder a press or hammer of ample capacity
7、to work the metalthroughout its section. However, 6-in. (152-mm) diameter orless rolls may be produced from rolled bars.6. Discard6.1 Sufficient discard shall be made from each ingot tosecure freedom from piping and undue segregation.7. Chemical Requirements7.1 Unless specified by the purchaser, the
8、 chemical require-ments shall be at the discretion of the manufacturer.8. Heat Treatment8.1 The method of heat treatment and hardening shall be atthe option of the manufacturer.9. Hardness Requirements9.1 The manufacturer shall supply rolls to the hardnessranges agreed upon by the purchaser and the
9、manufacturer.9.2 A hardness range of either 5 points Shore scleroscope or100 numbers Vickers hardness is permissible.10. Hardness Testing10.1 Each roll shall be tested for hardness and shall bewithin limits specified on the order. The Shore forged rollscleroscope (HFRSCor HFRSD), Rockwell hardness t
10、ester,Vickers hardness penetrator, or Leeb hardness tester (in accor-dance with Test Method A 956) may be used to determinecompliance with the hardness range specified. The approxi-mate relationship between Shore HFRSCscleroscope anddiamond pyramid hardness is shown in Table 1.10.2 The stage of proc
11、essing at which hardness testing isconducted and the number and location of tests may be agreedupon by the purchaser and the manufacturer.10.3 A sufficient number of hardness tests shall be made toensure the required uniformity, both longitudinally and circum-ferentially.1This specification is under
12、 the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.06 on Steel Forgings and Billets.Current edition approved September 10, 2002. Published June 2003. Originallyapproved in 1958. Last previous edition approved in 200
13、1 as A 427 74 (2001).2Annual Book of ASTM Standards, Vol 01.05.3Annual Book of ASTM Standards, Vol 03.01.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.11. Soundness1
14、1.1 The material shall be free of injurious imperfections.12. Workmanship12.1 The roll shall conform to the dimensions and surfacefinish specified by the purchaser.13. Marking13.1 Each roll shall be permanently identified with markingby the manufacturer on the end face of the journals, unlessotherwi
15、se specified.14. Report14.1 The manufacturer shall furnish a report of the hardnesstest. The type, model, and instrument used shall be reported. Inthe case of the Vickers hardness readings, the load shall bereported.15. Inspection15.1 The manufacturer shall afford the purchasers inspectorall reasona
16、ble facilities necessary to satisfy him that thematerial is being produced and furnished in accordance withthis specification. All tests and inspections shall be made at theplace of manufacture, unless otherwise specified, and shall notinterfere unnecessarily with the manufacturers operations.16. Re
17、jection16.1 A roll that fails to comply with the requirements of thisspecification shall be subject to rejection, and the manufacturershall be notified.17. Keywords17.1 cold and hot reduction; wrought alloy steel rollsTABLE 1 ApproximateARelationship Between Shore HFRScScleroscope and Diamond Pyrami
18、d Hardness for Wrought Hardened AlloySteel RollsNOTE 1This table is recommended for rolls over 6 in. (152 mm) in diameter. There is a tendency for rolls smaller than 6 in. in diameter with thesame Vickers hardness to show lower scleroscope readings.NOTE 2 For scleroscope hardness determinations, the
19、 calibration to standard reference blocks, and the verification of instrument are a constantnecessity. See details recommended in Practice E 448.NOTE 3For Rockwell and Vickers hardness determinations, reference may be made to Test Method E 18 and E 92.NOTE 4For hardness conversion tables for metals,
20、 see Tables E 140.Shore HFRScScleroscope Hardness Vickers HardnessBShore HFRSc Scleroscope Hardness Vickers HardnessB65 420 86 68566 432 87 69867 445 88 71068 457 89 72369 470 90 73570 482 91 74871 495 92 76172 508 93 77473 520 94 78774 533 95 80075 545 96 81276 558 97 82577 571 98 83778 584 99 8507
21、9 597 100 86280 610 101 87581 622 102 88882 635 103 90083 647 104 91384 660 105 92685 672AThe above hardness conversions cover an approximate relationship. The expected range of results on 95 % of hardness measurements is as follows:Conversion from Vickers hardness to shore HFRSc scleroscope hardnes
22、s, 6 3.7 Shore.Conversion from Shore HFRSc scleroscope hardness to Vickers hardness, 6 43 HV.BVickers hardness measurements are based on a load of 30 kgf. The Vickers penetrator was calibrated with a dead-weight Vickers hardness tester.A427022SUMMARY OF CHANGESCommittee A01 has identified the locati
23、on of changes since A 42774 (2001) that may impact the use of thisstandard.(1) Revised Section 2 to include A 788 and A 952, added 3.2,revised 10.1 to include Leeb Testing.(2) Added 3.2.(3) Revised 10.1 to include Leeb Testing.ASTM International takes no position respecting the validity of any paten
24、t rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision a
25、t any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your commen
26、ts will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted
27、by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A427023
