BS S 156-1976 Specification for 4% nickel-chromium-molybdenum case-hardening steel (vacuum arc remelted) billets bars forgings and parts (1320-1520 MPa)《4%镍-铬-钼表面硬化钢(真空电弧重熔)坯、棒材、锻件及零件规范(1320-1520M.pdf
《BS S 156-1976 Specification for 4% nickel-chromium-molybdenum case-hardening steel (vacuum arc remelted) billets bars forgings and parts (1320-1520 MPa)《4%镍-铬-钼表面硬化钢(真空电弧重熔)坯、棒材、锻件及零件规范(1320-1520M.pdf》由会员分享,可在线阅读,更多相关《BS S 156-1976 Specification for 4% nickel-chromium-molybdenum case-hardening steel (vacuum arc remelted) billets bars forgings and parts (1320-1520 MPa)《4%镍-铬-钼表面硬化钢(真空电弧重熔)坯、棒材、锻件及零件规范(1320-1520M.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD AEROSPACE SERIES CONFIRMED JUNE 1999 BS S 156:1976 Incorporating Amendment No. 1 Specification for 4% nickel-chromium- molybdenum case-hardening steel (vacuum arc remelted) billets, bars, forgings and parts (13201520 MPa) UDC 629.7:669.15242628-194-4:669.14.018.298.2 BSS 156:1976 Th
2、is British Standard, having been prepared under the directionof the Aerospace Industry Standards Committee,was published underthe authorityofthe Executive Boardon 30 June1976 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment 75
3、/72482 DC ISBN 0 580 09104 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 confer immunity from legal obligations. Summary of p
4、ages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2 and abackcover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued si
5、nce publication Amd. No. Date of issue Comments 3522 August 1981 Indicated by a sideline in the marginBSS 156:1976 BSI 01-2000 i Contents Page 1 Inspection and testing procedure 1 2 Manufacture 1 3 Chemical composition 1 4 Surface dressing 1 5 Condition 1 6 Heat treatment 1 7 Mechanical properties 2
6、ii blankBSS 156:1976 BSI 01-2000 1 1 Inspection and testing procedure 1.1 General. This British Standard shall be used in conjunction with the relevant sections of the latest issue of BS S 100 as follows: 1.2 Sulphur printing or deep etching tests. Onesample shall be taken from each end of each ingo
7、t for sulphur printing or deep etching tests. 1.3 Ultrasonic examination. Billets and bars and, where practicable, forgings shall be subjected to ultrasonic examination. 2 Manufacture The material shall be manufactured by consumable electrode vacuum arc remelting. 3 Chemical composition The steel sh
8、all contain: 4 Surface dressing The material shall be overall dressed. 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 Normalizing treatment. The normalizing treatment shall consist of he
9、ating uniformly at a temperature between910 C and 930 C, followed by cooling in air. Bars for machining delivered inother than the finally heat treated condition sections 1 and 2 Forging stock and billets and bars for subsequent working sections 1 and 5 Forgings sections 1 and 6 Parts finally heat t
10、reated aftermachining sections 1 and 7 Element % min. max. Carbon 0.14 0.18 Silicon 0.10 0.35 Manganese 0.25 0.55 Phosphorus 0.015 Sulphur 0.012 Chromium 1.0 1.4 Molybdenum 0.20 0.30 Nickel 3.8 4.3 Designation Form Condition of supply S156B Black bars formachining Normalized and softened S156D Brigh
11、t bars for machining Normalized and softened and subsequently cold drawn, cold rolled, machined or ground S156A Forging stock and billets and barsfor subsequent working Softened S156C Forgings Normalized and softenedBSS 156:1976 2 BSI 01-2000 6.2 Softening treatment. The softening treatment shall co
12、nsist of heating uniformly at a temperature of not less than 630 C, followed by cooling in air. 6.3 Final heat treatment 6.3.1 Except as provided in 6.3.2, the final heat treatment shall consist of the following: a) Carburizing or blank carburizing. Heat uniformly at a temperature between 880 C and
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BSS1561976SPECIFICATIONFOR4NICKELCHROMIUMMOLYBDENUMCASEHARDENINGSTEELVACUUMARCREMELTEDBILLETSBARSFORGINGSANDPARTS13201520MPA4
链接地址:http://www.mydoc123.com/p-399113.html