1、Designation: A 427 02 (Reapproved 2007)Standard 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 ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers homogeneous wrought hard-ened alloy steel rolls for use in cold or hot reduction of f
3、latrolled ferrous and nonferrous products.2. Referenced Documents2.1 ASTM Standards:2A 788/A 788M Specification for Steel Forgings, GeneralRequirementsA 956 Test Method for Leeb Hardness Testing of SteelProductsE18 Test Methods for Rockwell Hardness of MetallicMaterialsE92 Test Method for Vickers Ha
4、rdness of Metallic Mate-rialsE 140 Hardness Conversion Tables for Metals RelationshipAmong Brinell Hardness, Vickers Hardness, RockwellHardness, Superficial Hardness, Knoop Hardness, andScleroscope HardnessE 448 Practice for Scleroscope Hardness Testing of MetallicMaterials3. Ordering Information3.1
5、 The purchaser 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 A 788/A 788M, which out-lines a
6、dditional ordering 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 vacuu
7、m arc remelt 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. (152-mm) diameter orless rolls may be produced from rolled bars.6. Discard6.1 Sufficient
8、 discard shall 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.8. Heat Treatment8.1 The method of heat treatment and hardening shall be
9、atthe option of the manufacturer.9. Hardness Requirements9.1 The manufacturer shall supply rolls to the hardnessranges agreed 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 Ea
10、ch roll shall be tested for hardness and shall bewithin limits specified on the order. The Shore forged rollscleroscope (HFRSCor HFRSD), Rockwell hardness tester,Vickers hardness penetrator, or Leeb hardness tester (in accor-dance with Test Method A 956) may be used to determinecompliance with the h
11、ardness range specified. The approxi-mate relationship between Shore HFRSCscleroscope anddiamond pyramid hardness is shown 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.1This
12、specification is under 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 Nov. 1, 2007. Published January 2008. Originallyapproved in 1958. Last previous edit
13、ion approved in 2002 as A 427 02.2For referenced 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.1Copyright ASTM Internationa
14、l, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.10.3 A sufficient number of hardness tests shall be made toensure the required uniformity, both longitudinally and circum-ferentially.11. Soundness11.1 The material shall be free of injurious imperfections.12. Wor
15、kmanship12.1 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, unlessotherwise specified.14. Report14.1 The manufacturer shall furnish a repo
16、rt 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 reasonable facilities necessary to satisfy him that thematerial is being
17、 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. Rejection16.1 A roll that fails to comply with the requirements of
18、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 Pyramid Hardness for Wrought Hardened AlloySteel RollsNOTE 1This table
19、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 calibration to standard reference blocks, and the verification o
20、f instrument are a constantnecessity. See details recommended in Practice E 448.NOTE 3For Rockwell and Vickers hardness determinations, reference may be made to Test Methods E18and Test Method E92.NOTE 4For hardness conversion tables for metals, see Tables E 140.Shore HFRScScleroscope Hardness Vicke
21、rs 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 88882 635 103 900
22、83 647 104 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 HFRSc scleroscope
23、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.A 427 02 (2007)2ASTM International takes no position respecting the validity of any patent rights asserted in connectio
24、n 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 at any time by the responsible
25、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 comments will receive careful consid
26、eration 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 by ASTM International, 100 Bar
27、r 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).A 427 02 (2007)3
