BS 4486-1980 Specification for hot rolled and hot rolled and processed high tensile alloy steel bars for the prestressing of concrete《混凝土预加应力用热轧和热轧并处理的高抗拉强度的合金钢筋规范》.pdf
《BS 4486-1980 Specification for hot rolled and hot rolled and processed high tensile alloy steel bars for the prestressing of concrete《混凝土预加应力用热轧和热轧并处理的高抗拉强度的合金钢筋规范》.pdf》由会员分享,可在线阅读,更多相关《BS 4486-1980 Specification for hot rolled and hot rolled and processed high tensile alloy steel bars for the prestressing of concrete《混凝土预加应力用热轧和热轧并处理的高抗拉强度的合金钢筋规范》.pdf(11页珍藏版)》请在麦多课文档分享上搜索。
1、BSI BSm44Bb 80 3b2Ybb O007723 7 BS 4486 :I 980 UDC 669.14.018.295.3-422-122.4: 666.982.4 S pecif kat ion for Hot rolled and hot rolled and processed high tensile alloy steel bars for the prestressing of concrete Spcification pour les barres en acier alli haute rsistance lamines chaud et lamines chau
2、d et transformes pour la prcontrainte du bton Spezifikation fr warmgewalzte sowie warmgewalzte und bearbeitete hochfeste Legierungsstahlstangen fr das Vorspannen von Beton British Standards Institution Gr3 w BS 4486 : 1980 Contents Page Foreword Inside front cover Cooperating organizations Back cove
3、r Specification 1. Scope 1 2. References 1 3. Definitions 1 4. Designation for enquiry and order purposes 1 5. Manufacture 1 Foreword This British Standard, prepared under the direction of the Iron and Steel Standards Committee, was first published in 1969, and specifies requirements for cold worked
4、 high tensile alloy steel bars used in prestressed concrete. During the period since 1969, the European Coal and Steel Community in Project Group 101 generated Euronorm 138 Prestressing steels. This revision of BS 4486: 1969 for hot rolled and hot rolled and processed high tensile steel bars for the
5、 prestressing of 6. Mass of processed bar tendons 7. Dimensions and properties 8; Periodic tests 9. Routine testing and inspection Page 2 2 2 2 Table 1. Dimensions and properties of hot rolled and hot rolled and processed high tensile alloy steel bars 4 concrete supersedes the 1969 issue and it clos
6、ely follows the appropriate parts of Euronorm 138, but some minor changes have been made in order to make it applicable to the requirements of the United Kingdom. Requirements for high tensile steel wire and strand for the prestressing of concrete are specified in BS 5896. sd are advised to consider
7、 the desirability of third party certification of product conformity with this British Standard based on testing and continuing surveillance, which may be coupled with assessment of a suppliers quality system against the appropriate Part of BS 5750. Enquiries as to the availability of third party ce
8、rtification schemes will be forwarded by BSI to the Association of Certification Bodies. If a third party certification scheme does not already exist, users should consider approaching an appropriate body from the list of association members. NOTE. Attention is drawn to the requirements in 9.2 for m
9、aterial covered by a certification scheme. Compliance with a British Standard does not of itself confer immunity from legal obligations. BSI BSm4YBb 80 m Lb24669 0007723 O m BS 4486 : 1980 British Standard Specification for Hot rolled and hot rolled and processed high tensile alloy steel bars for th
10、e prestressing of concrete 1. Scope 4.2 The bars shall be designated as follows: A This British Standard specifies requirements for preferred sizes of smooth or deformedialloy steel bars in straight lengths supplied in the hot rolled or hot rolled and processed conditions. Two nominal strength level
11、s of steel are specified. This standard does not specify fatigue testing, this subject being included in BS 4447. Stress-corrosion (a) BS 4486; (b) RE = smooth, RR = deformed (c) nominal diameter; (d) nominal tensile strength. Example. A round smooth bar of 32 mm nominal diameter and 1030 N/mm2 nomi
12、nal tensile strength is designated . testing is not specified. BS 4486-RE-32-1030. 2. References The titles of the standards publications referred to in this standard are listed on the inside back cover. 3. Definitions For the purposes of this British Standard, the following definitions apply. 3.1 c
13、ast. Usually the product of a single furnace charge. ladles, the product of each ladle may be called a separate cast. 3.2 bar. A steel product produced in straight lengths by hot rolling of steel and which may be smooth or deformed Processed bars are bars subsequently processed by stretching or othe
14、r forms of cold working, and which also may have an additional tempering treatment to give the required properties. 3.3 bar tendon. A bar used in prestressed concrete. 5. Manufacture 5.1 Unless the process is specified by the purchaser in his order, the steel may be made by any process except that t
15、he air, and mixed air/oxygen bottom blown basic converter processes shall not be mechanical properties. Such processing may take the form 5.2 The steel shall be hot rolled into bars. Subsequent processing may be required to achieve the specified freatment may follow such cold working., sulphur or mo
16、re than 0.040 % phosphorus. 5.4 If required by the purchaser, a chemical analysis of the steel shall be provided by the supplier. 5.5 When deformed . Where the furnace contents are tapped into Or more of cold working by stretching and tempering 5.3 ne cast analysis shall not show more than 0.040 . s
17、hall be transversed with a substantially uniform spacing not greater than 0.8 nominal size; this applies to continuous or discontinuous helical deformations, where present. 3.4 nominal size. The diameter of a nominally round bar. The deformation shall be in the form of ribs or of a thread. For defor
18、medibar the nominal size is the diameter ofa round The mean area of ribs or thread per unit length above the bar of the same cross-sectional area. core of the bar, projected on a plane normal to the axis of 3.5 length. A piece of straight bar, without joint, cut to a specified length. 3.6 batch. A n
19、umber of lengths of one nominal size from one cast. 3.7 consignment. Ani quantity of material prepared at any one time for delivery to one location. 4. Designation for enquiry and order purposes 4.1 When ordering material to this standard, the purchaser shall state: (a) the number of this British St
20、andard, .e. BS 4486; (b) type of surface, .e. smooth or deformed (c) nominal size; (d) nominal tensile strength; (e) packing and protection requirements. ! the bar, shall not be less than (0.15 nominal size) mm2 per mm of bar length. 5.6 Where bars are threaded after processing, the thread : shall b
21、e cold rolled. When used with suitably designed components, threads shall be capable of compliance with . the . requirements of BS 4447 and .- note4of table 1.; : 5.7 The finished material shall be free from defects, which may have occurred at any stage during mariufacture, to a degree that would im
22、pair the performance as a prestressing bar. -Longitudinal cracks that do not impair the specified properties of the bar shall not be considered as a defect. 5.8 Production lengths shall contain no welds. All bars shall be protected at all stages of manufacture from the effects of local heat, whether
23、 by weld splash or other accidental means. The manufacturer shall give adequate protection to prevent corrosion and damage to bars before delivery to the purchaser. In particular, threaded ends shall be treated to retain a film of lubricating oil on threads. NOTE. Coatings for specific purposes are
24、to be applied to the surface of the steel only if previously agreed between the manufacturer and the purchaser, Such coatings are not specified in this standard. . -_ BSI BS*VllBb 80 m BS 4486 : 1980 lb24bbS 0007724 2 m 6. Mass of processed bar tendons 6.1 The mass of bar tendons shall be calculated
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