1、Designation: A427/A427M 10Standard Specification forWrought Alloy Steel Rolls for Cold and Hot Reduction1This standard is issued under the fixed designation A427/A427M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () 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 flatrolle
3、d ferrous and nonferrous products.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems
4、may result in non-conformancewith the standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regu
5、latory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A788/A788M Specification for Steel Forgings, General Re-quirementsA956 Test Method for Leeb Hardness Testing of SteelProductsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE92 Test Method for Vickers Hardness of
6、 Metallic Materi-alsE140 Hardness Conversion Tables for Metals RelationshipAmong Brinell Hardness, Vickers Hardness, RockwellHardness, Superficial Hardness, Knoop Hardness, andScleroscope HardnessE448 Practice for Scleroscope Hardness Testing of MetallicMaterials3. Ordering Information3.1 The purcha
7、ser shall specify in the inquiry, contract, ororder the complete dimensions, hardness range, surface finish,and use. Any other requirements shall also be specified.3.2 Material supplied to this specification shall conform tothe requirements of Specification A788/A788M, which out-lines additional ord
8、ering information, manufacturing require-ments, testing and retesting methods and procedures, marking,certification, product analysis variations, and additional supple-mentary requirements.4. Process4.1 The steel shall be made by the electric-furnace process.Additional refining by vacuum arc remelt
9、or electroslag ispermitted.5. Manufacture5.1 The forged rolls shall receive their hot mechanical workunder a press or hammer of ample capacity to work the metalthroughout its section. However, 6-in. 150-mm diameter orless rolls may be produced from rolled bars.6. Discard6.1 Sufficient discard shall
10、be made from each ingot tosecure freedom from piping and undue segregation.7. Chemical Requirements7.1 Unless specified by the purchaser, the chemical require-ments shall be at the discretion of the manufacturer.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless S
11、teel and Related Alloys and is the direct responsibility of SubcommitteeA01.06 on Steel Forgings and Billets.Current edition approved April 1, 2010. Published April 2010. Originallyapproved in 1958. Last previous edition approved in 2007 as A427 02 (2007).DOI: 10.1520/A0427_A0427M-10.2For referenced
12、 ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright
13、 ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 agr
14、eed upon by the purchaser and the 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 (H
15、FRSCor HFRSD), Rockwell hardness tester,Vickers hardness penetrator, or Leeb hardness tester (in accor-dance with Test Method A956) may be used to determinecompliance with the hardness range specified. The approxi-mate relationship between Shore HFRSCscleroscope anddiamond pyramid hardness is shown
16、in Table 1.10.2 The stage of processing 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-ferenti
17、ally.11. Soundness11.1 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 jour
18、nals, unlessotherwise 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 i
19、nspectorall reasonable 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 manufacturer
20、s operations.16. Rejection16.1 A roll that fails to comply with the requirements of thisspecification shall be subject to rejection, and the manufacturershall be notified.TABLE 1 ApproximateARelationship Between Shore HFRScScleroscope and Diamond Pyramid Hardness for Wrought Hardened AlloySteel Roll
21、sNOTE 1This table is recommended for rolls over 6 in. 150 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 calibration to standard reference blocks, and th
22、e verification of instrument are a constantnecessity. See details recommended in Practice E448.NOTE 3For Rockwell and Vickers hardness determinations, reference may be made to Test Methods E18 and Test Method E92.NOTE 4For hardness conversion tables for metals, see Tables E140.Shore HFRScScleroscope
23、 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 85079 597 100 86280 610 101 87581 622 102 88
24、882 635 103 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 hardness, 6 3.7 Shore.Conversion from Shore HFR
25、Sc 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.A427/A427M 10217. Keywords17.1 cold and hot reduction; wrought alloy steel rollsSUMMARY OF CHANGESCommit
26、tee A01 has identified the location of selected changes to this standard since the last issue (A427 02(2007) that may impact the use of this standard. (Approved April 1, 2010.)(1) Changed to dual designation.(2) Added 1.2 and 1.3.(3) Revised Note 1 in Table 1.ASTM International takes no position res
27、pecting the validity of any patent 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
28、standard is subject to revision at 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 Intern
29、ational Headquarters. Your comments 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 be
30、low.This standard is copyrighted 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A427/A427M 103
