ImageVerifierCode 换一换
格式:PDF , 页数:8 ,大小:258.33KB ,
资源ID:543471      下载积分:10000 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
注意:如需开发票,请勿充值!
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【http://www.mydoc123.com/d-543471.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(BS 2S 146-1976 Specification for 4% nickel-chromium-molybdenum air-hardening steel (vacuum arc remelted) billets bars forgings and parts (1760-1960 MPa limiting ruling section 100 .pdf)为本站会员(diecharacter305)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

BS 2S 146-1976 Specification for 4% nickel-chromium-molybdenum air-hardening steel (vacuum arc remelted) billets bars forgings and parts (1760-1960 MPa limiting ruling section 100 .pdf

1、BRITISH STANDARD AEROSPACE SERIES CONFIRMED AUGUST 1985 BS 2S 146:1976 (Superseding BS S 146) Incorporating Amendment No. 1 Specification for 4% nickel-chromium- molybdenum air-hardening steel (vacuum arc remelted) billets, bars, forgings and parts (17601960 MPa: limiting ruling section100mm) UDC 62

2、9.7:669.15242628-194-4:669.14.018.298.3BS2S146:1976 This British Standard, having been prepared under the directionof the Aerospace Standards Committee, was published under the authority ofthe Executive Board on 30 November 1976 BSI 01-2000 The following BSI references relate to the work on this sta

3、ndard: Committee reference ACE/15 Draft for comment 75/74998DC ISBN 0 580 09498 7 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

4、 confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendmen

5、t table on the inside front cover. Amendments issued since publication Amd. No. Date of issue Comments 3524 August 1981 Indicated by a sideline in the marginBS2S146:1976 BSI 01-2000 i Contents Page 1 Inspection and testing procedure 1 2 Manufacture 1 3 Chemical composition 1 4 Surface dressing 1 5 C

6、ondition 2 6 Heat treatment 2 7 Mechanical properties 2ii blankBS2S146:1976 BSI 01-2000 1 NOTEThe Specified chemical composition complies with AECMA Recommendation FE-PL 78. 1 Inspection and testing procedure 1.1 General. This British Standard shall be used in conjunction with the relevant sections

7、of the latest issue of BS S 100 as follows: 1.2 Sulphur printing or deep etching tests. One sample shall be taken from each end of each ingot for sulphur printing or deep etching tests. 1.3 Ultrasonic examination. Billets and bars and, where practicable, forgings shall be subjected to ultrasonic exa

8、mination. 2 Manufacture The material shall be manufactured by consumable electrode vacuum arc remelting. 3 Chemical composition The steel shall contain: 4 Surface dressing The material shall be overall dressed. Bars for machining delivered in other than the finallyheat treated condition sections 1 a

9、nd 2 Forging stock and billets and bars for subsequent working sections 1 and 5 Forgings sections 1 and 6 Parts finally heat treated after machining sections 1 and 7 Element % min. max. Carbon 0.34 0.42 Silicon 0.15 0.35 Manganese 0.15 0.60 Phosphorus 0.015 Sulphur 0.0l0 Chromium 1.6 2.0 Molybdenum

10、0.40 0.60 Nickel 3.5 4.5BS2S146:1976 2 BSI 01-2000 5 Condition 5.1 The material shall be supplied in the appropriate condition stated below: 5.2 Parts shall be supplied finally heat treated. 6 Heat treatment 6.1 Softening treatment. The softening treatment shall consist of heating uniformly at a tem

11、perature of not less than 630 C. 6.2 Final heat treatment. The final heat treatment shall consist of the following: a) Hardening. Heat at a temperature of 875 10 C, followed by cooling in still air, followed immediately by b). b) Sub-zero treatment. Hold at a temperature between70 C and80 C for not

12、less than 2 h. c) Tempering. Heat uniformly at a temperature between180 C and220 C, followed by cooling in air. 7 Mechanical properties 7.1 Tensile test at room temperature and impact test 7.1.1 Except as provided in 7.1.2, the mechanical properties obtained from test pieces, heat treated at test pi

13、ece size, shall be as follows: 7.1.2 Alternatively to 7.1.1, the mechanical properties obtained from transverse test pieces, heat treated at test piece size, shall be as follows: NOTEInformation on SI units is given in BS 3763 “The International System of units (SI)” and BS 350 “Conversion factors a

14、nd tables”. 7.2 Hardness test 7.2.1 The hardness of material heat treated in accordance with 6.1 shall be not greater than302 HB. 7.2.2 The hardness of material, parts and test samples heat treated in accordance with 6.2 shall be not less than 530 HV. Designation Form Condition of supply S146B Black

15、 bars for machining Softened S146D Bright bars for machining Softened and subsequently cold drawn, cold rolled, machined or ground S146A Forging stock and billets and bars for subsequent working Softened S146C Forgings Softened 0.2 % proof stress Tensile strength Elongation Reduction of area Izod im

16、pact min. min. max. min. min. min. MPa (= N/mm 2 ) MPa (= N/mm 2 ) MPa (= N/mm 2 ) % % ft lbf 1420 1760 1960 8 35 15 0.2 % proof stress Tensile strength Elongation Reduction of area Izod impact min. min. max. min. min. min. MPa (= N/mm 2 ) MPa (= N/mm 2 ) MPa (= N/mm 2 ) % % ft lbf 1420 1760 1960 6

17、25 8blankBS 2S 146:1976 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisio

18、ns BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambigui

19、ty while using this BritishStandard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automati

20、cally receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel:02089969001. Fax:02089967001. In response to orders for international standards, it is BSI policy to supply the BSI impl

21、ementation of those that have been published as BritishStandards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic in

22、formation services are also available which give details on all its products and services. Contact the Information Centre. Tel:02089967111. Fax:02089967048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards

23、. For details of these and other benefits contact Membership Administration. Tel:02089967002. Fax:02089967001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the

24、 Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementin

25、g the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel:02089967070.

copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
备案/许可证编号:苏ICP备17064731号-1