SAE J 402-2005 New Steel Designation System for Wrought or Rolled Steel《锻钢或轧制钢用新钢命名系统》.pdf

1、 SURFACE VEHICLE STANDARD (R) New Steel Designation System for Wrought or Rolled Steel SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability an

2、d suitability for any particular use, including any patent infringement arising there from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestion

3、s. Copyright 2005 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOC

4、UMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS: http:/www.sae.org Issued 1912-01 Revised 2005-07 Superseding J402 MAY1997 J402 REV. JUL2005 1. Scope This SAE Standard describes a new alphanumeric designat

5、ion system for wrought steel used to designate wrought ferrous materials, identify chemical composition, and any other requirements listed in SAE Standards and Recommended Practices. The previous SAE steel designation coding system consisted of four or five numbers used to designate standard carbon

6、and alloy steels specified to chemical composition ranges. Using SAE 1035 as an example, the 35 represents the nominal weight % carbon content for the grade. Using SAE 52100 as an example, the 100 represents the nominal weight % carbon content. The first two numbers of this four or five number serie

7、s are used to designate the steel grade carbon or alloy system with variations in elements other than carbon. These are described in Table 1. In addition to the standard four or five number steel designation above, a letter was sometimes added to the grade code to denote a non-standard specific elem

8、ent being added to the standard grade. For example, with SAE 10B21, B designates a boron addition; with SAE 12L14, L designates a lead addition; and with SAE 10V45, V designates a vanadium addition. For many years, the SAE four or five character steel designation system has provided a simple way to

9、identify and label steel grades. However, it is not comprehensive enough to allow for the accurate coding of popular new or non-standard chemistry grades, different chemistries for the same grade that traditionally have been associated with a specific product form, eg. SAE 1006 and SAE 1008, steel g

10、rades with dual chemistry and mechanical property requirements, microalloyed grades, and grades with both chemistry and hardenability requirements. As a result, these grades could not be properly recorded within the constraints of the previous steel designation system and were not included in the SA

11、E steel grade Tables in SAE J403/J404 and other SAE documents. The new steel designation system is meant to ensure that the original or old SAE steel grades are still usable and both old and new SAE grades can be referenced uniformly between Standards organizations. Since the UNS numbering system fo

12、r metals provides the basis for the recording of steel grades between North American and International Standards organizations, UNS was used as the framework of the new coding system. However, in order for the traditional five number UNS code to be used, it had to be expanded and modified to allow f

13、or an increase in the number of grades that would need to be classified in the future and to provide proper coding of new or non-standard element modifications, corresponding element ranges and dual hardenability, mechanical property or special processing requirements. Copyright SAE International Pr

14、ovided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J402 Revised JUL2005 - 2 - These new steel designations are the same in both the UNS and SAE systems, as described in this standard (J402) and the joint SAE J1086/ASTM E527 UNS

15、Publication. An alphanumeric code has been developed to identify the composition of SAE steel grades. 1.1 Rationale The name of J402 has been changed to reflect the “New SAE Steel Designation System for Wrought or Rolled Steel”. SAE J402 has been completely rewritten to describe a new SAE/UNS steel

16、designation system which will be used to identify current and new steel grades. This system will replace the old UNS designations used to identify modified SAE steel grades. 2. References 2.1 Applicable Documents The following publications form a part of this specification to the extent specified he

17、rein. Unless otherwise specified, the latest issue of SAE publications shall apply. 2.1.1 SAE PUBLICATIONS Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J403Chemical Compositions of SAE Carbon Steels SAE J404Chemical Compositions of SAE Alloy Steels SAE J1086Numbering Me

18、tals and Alloys SAE J1249Former SAE Standard and Former SAE Ex-Steels SAE J1268Hardenability Bands for Carbon and Alloy H Steels SAE J1868Restricted Hardenability Bands for Selected Alloy Steels SAE HS-1086Metals and Alloys in the Unified Numbering System 2.1.2 ASTM PUBLICATIONS Available from ASTM,

19、 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM E 527Practice for Numbering Metals and Alloys (UNS) ASTM DS 56HMetals and Alloys in the Unified Numbering System (UNS) 3. New SAE Steel Designation The new SAE steel designation is a five character alphanumeric code consisting of a lette

20、r prefix “G”, ”H”, or “K”, and the conventional four number steel grade code. The first two numbers identify the characteristic carbon or alloy system and the last two numbers designate the nominal weight % carbon content. The four numeric descriptors will follow the current SAE steel specifications

21、 to enable continuity between this revised standard and prior standards. This five character code is followed by a three digit element modification code (reference Table 2) indicating the specific element(s) being modified, changed or added. The three digit code is then followed by a four digit code

22、 (reference Table 3) describing the modification in the chemical ranges and the Supplementary Requirements for Testing and Special Practices. The following illustrates the coding series for the new SAE grade designation. Copyright SAE International Provided by IHS under license with SAENot for Resal

23、eNo reproduction or networking permitted without license from IHS-,-,-SAE J402 Revised JUL2005 - 3 - G or H or K XXXX-XXX-XXXX Letter Grade Series Grade Code Name Element(s) Modification Element(s) Range or Supplementary Requirement (Testing, Special Practices, etc.) Examples using the new coding sy

24、stem are presented in the footnotes at the end of Tables 3 and 4. 4. Grade Series 4.1 G Series Grades The standard SAE “G” series will have “chemistry only” requirements. Standard SAE steel grades are listed in SAE J403 and J404 with their specified chemistry ranges. Since there are no element modif

25、ications for these steels, their three digit element modification codes and the four digit element modification range codes are all zeros, indicating that there are no modifications. The new SAE steel designation provides for the coding of new, non-standard or modified steel grades by the use of a t

26、hree number digit modification code followed by a four digit modified element range code. Both the standard and the modified steels will share the same initial five character identification code to indicate which standard grade forms the basis for the modified grade. 4.2 H Series Grades The SAE “H”

27、series will have a dual chemistry and hardenability requirement. The chemistry ranges and the hardenability requirements for standard SAE H and RH grades are listed in SAE J1268 and SAE J1868, respectively. Non-standard or modified grades will be coded with a three digit element modification code an

28、d a four digit element modification range code. The hardenability requirement may be a Jominy hardenability band requirement, specific J position(s) hardenability specification, a DI hardenability range or other condition. New grades will be listed in SAE J1268 and SAE J1868 and/or the appropriate A

29、STM standard along with their chemistry and hardenability requirement. The specific hardenability requirement along with the chemistry is described in the UNS Publication “Metals and Alloys in the Unified Numbering System published jointly as SAE HS-1086 and ASTM DS-56H. 4.3 K Series Grades The SAE

30、“K” series steels have dual chemistry and supplementary mechanical property or special processing requirements. The chemistry and supplementary requirements for a specific grade/product is listed in the appropriate SAE/ASTM steel product standard. The grade along with the chemistry and the standard

31、where details on the supplementary requirements can be found will be documented in the UNS Publication “Metals and Alloys in the Unified Numbering System” published jointly as SAE HS-1086 and ASTM DS-56H. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction

32、 or networking permitted without license from IHS-,-,-SAE J402 Revised JUL2005 - 4 - 5. Grade Code The four digit grade code conforms to the generic grade designations in Table 1. This four number series will denote the generic grade as described in the Scope and in Section 2 of the “New SAE Steel D

33、esignation” above. 6. Element Modification Code The three digit modification code will be assigned in the order indicated in Table 2. New grade modification codes will be assigned sequentially as new grades are added. A modification to SAE grade chemistry will in general consist of one or two elemen

34、ts being outside the specified chemistry limits cited in SAE J403, J404, J1268, and J1868. Restrictive chemical ranges within the SAE range for a grade will not normally be considered as a modified grade unless there is consensus that this serves a useful purpose, for example, a restrictive sulfur l

35、evel for SAE 1006 or SAE 1008 flat rolled steel. The two element modification code will be reported in alphabetical order based on using the full name of the element, rather than its chemical symbol, as the basis for ranking, for example, NICkel (Ni) would precede NIObium (Nb). The three digit eleme

36、nt modification will allow up to two elements to be modified on a standard grade. If three or more element modifications are involved with a standard grade, a new generic grade name should be considered as per Table 1. 7. Element Modification Code Details or Supplementary Requirements 7.1 Element Mo

37、dification Range Code The four digit element modification range code will be indicated as in Table 3. The table will be expanded as necessary and new code numbers will be assigned sequentially as new steel grades are added. Modifications or restrictions may be represented as minimum element concentr

38、ation values, maximum element concentration values or as an allowable element concentration range and will be assigned alphabetically as described in Section 5. The first two digits of the four digit modifier code will describe the first element addition or modification while the second two digits w

39、ill describe the second element modification, if applicable. To facilitate recognition of whether the modification or limitation is a minimum, maximum or range, the following system will be employed to describe the chemistry limitation: Digits 00 No deviation from parent grade Digits 01-24 Minimum v

40、alue Digits 25-49 Maximum value Digits 50-99 Range Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J402 Revised JUL2005 - 5 - 7.2 Supplementary Requirement Code The four digit supplementary requi

41、rement code is an alphanumeric system describing the test, mechanical properties or special processing condition(s). This information is indicated in Table 4, which will act as a reference table in SAE J402. It is suggested the user reference the actual standards. 8. Additions and Deletions of Steel

42、 Grades 8.1 Additions New additions to the SAE standard “G”, “H” and ”K” series steels, as listed in SAE J403/J404 and/or SAE J1268/J1868, will be based upon the results of the five-year SAE Steel Grade Usage Survey indicating that the new grade meets minimum tonnage requirements, is supported by tw

43、o or more users/producers, and is in compliance with standard SAE grade chemistry ranges. These same rules apply to new modified steel grades, except that there must be general consensus agreement between users and producers on the ranges of the modified elements. With respect to the “H” series and

44、the “K” series grades, there must be general agreement between users and producers on the hardenability requirement or supplementary requirements respectively. 8.2 Deletions Deletions are also based upon the results of the SAE Steel Grade Usage Survey and a consensus that the steel grade is no longe

45、r being produced (or production tonnage is well below the minimum). The deleted steel grades will be removed from the standard and transferred to SAE J1249 for permanent storage in the archived grade tables. 9. Reporting of New Steel Designation 9.1 The new steel designation will be listed in the gr

46、ade tables in SAE J403 and J404 and /or other SAE standards with the generic grade code(name), chemistry ranges, mechanical properties and hardenability requirement. If a Jominy hardenability curve for the grade is specified, the H or RH grade will be listed in SAE J1268 or J1868 respectively. 9.2 T

47、he grade series, the grade code, the element modification(s), the element codes and basic information concerning supplementary requirements will be listed in SAE J402. As new codes are assigned, this Standard will be updated based on a five-year review or as needed. Copyright SAE International Provi

48、ded by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J402 Revised JUL2005 - 6 - TABLE 1GRADE CODES OF CARBON AND ALLOY STEELS SAE Grade Old UNS Designation New Steel Designation Identifying Chemical Characteristics Reference SAE Std.

49、 CARBON STEELS 10XX G10XX0 G10XX-000-0000 Mn 1% max. - Nonresulphurized Steels J403 & J1249 11XX G11XX0 G11XX-000-0000 Resulfurized Steels J403 & J1249 12XX G12XX0 G12XX-000-0000 Rephosphorized and Resulfurized Steels J403 & J1249 15XX G15XX0 G15XX-000-0000 Mn over 1% -Nonresulfurized Steels J403 & J1249 ALLOY STEELS 13XX G13XX0 G13XX-000-0000 Manganese Steels J404 & J1249 23XX G23XX0 G23XX-000-0000 Nickel Steels J1249 25XX G25XX0 G25