技术要求大全（Technical requirements）

Designation: F 1554 – 07a Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength1 This standard is issued under the fixed designation F 1554; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 This specification covers straight and bent, headed and headless, carbon, carbon boron, alloy, or high-strength low-alloy steel anchor bolts (also known as anchor rods). The Anchor bolts are furnished in three strength grades, two thread classes, and in the sizes specified in Section 4. 1.2 The anchor bolts are intended for anchoring structural supports to concrete foundations. Such structural supports include building columns, column supports for highway signs, street lighting and traffic signals, steel bearing plates, and similar applications. 1.3 Supplementary requirements are included to provide for Grade 55 weldable steel，permanent manufacturers and grade identification, and impact properties for Grades 55 and 105. 1.4 Zinc coating requirements are included in Section 7 for Applications requiring corrosion protection. 1.5 The recommended grade and style of nut and washer are included in 6.6 and 6.7 for each grade. 1.6 This specification does not cover the requirements for mechanical expansion anchors, powder-activated nails or studs, or anchor bolts fabricated from deformed bar. 1.7 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 2. Referenced Documents 2.1 ASTM Standards: A 194/A194M Specification for Carbon and Alloy Steel Nuts for Bolts for High-Pressure and High-Temperature Service3 A 370 Test Methods and Definitions for Mechanical Testing of Steel Products4 A 563 Specification for Carbon and Alloy Steel Nuts5 A 673/A673M Specification for Sampling Procedure for Impact Testing of Structural Steel6 A 751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products4 B 695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel7 D 3951 Practice for Commercial Packaging8 F 436 Specification for Hardened Steel Washers5 F 606 Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and Rivets5 F 2329 Specification for Zinc Coat. Hot-dip. Requirements for Application to Carbon and Alloy steel Bolts Screws. Washer. Nut, and Alloy Steel Bolts, Screws, Washer, Nuts, and Special Threaded Fastener. 设计：F 1554 – 99 本规范适用屈服强度为36，55和105ksi（248,380和725MPa）的锚栓 本规范根据设计规范F 1554发布：规范里面数据是设计规范最初数据或者最近修改数据。括号中的数据标明最近认可的年份。上角标示最近的修改认可。 1. 适用范围 1.1 本规范适用直的和弯的，带头和不带头，碳钢或者碳磞钢，合金钢，或者高强度低合金锚栓（即锚杆）。提供的锚栓根据3个强度等级，两个螺纹等级，和尺寸在第4章进行分类。 1.2 这种锚栓或者锚杆指的是锚固支撑在混泥土上的构件，比如建筑物的柱子，高速公路指示牌，信号灯，路灯的支撑柱，垫板或者类似的构件。 1.3 对于55级（380MPa）可焊接钢材有其他附加要求，55级（380Mpa）和105级（725MPa）共同附加要求包括：永久性的强度标签，制造商标签和抗冲击试验的要求. 1.4 对于使用要求防腐的有镀锌要求见第7章 1.5 在6.6和6.7章节分别对螺母和垫圈强度和样式做出了推荐性的建议。 1.6 本规范没有包括：机械膨胀锚栓，由钢棒轧制而成的铆钉，碳粉激活双头锚栓或者锚杆。 1.7 所有数值均以英制数值为标准，括号里标注的数值仅供参考 2. 参考文献 2.1 ASTM标准 A 194/A194M Specification for Carbon and Alloy Steel Nuts for Bolts for High-Pressure and High-Temperature Service3 A 370 Test Methods and Definitions for Mechanical Testing of Steel Products4 A 563 Specification for Carbon and Alloy Steel Nuts5 A 673/A673M Specification for Sampling Procedure for Impact Testing of Structural Steel6 A 751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products4 B 695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel7 D 3951 Practice for Commercial Packaging8 F 436 Specification for Hardened Steel Washers5 F 606 Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and Rivets5 F 2329 Specification for Zinc Coat. Hot-dip. Requirements for Application to Carbon and Alloy steel Bolts Screws. Washer. Nut, and Alloy Steel Bolts, Screws, Washer, Nuts, and Special Threaded Fastener. 2.2 Research Council on Structural Connections Standard9: Specification for Structural Joints Using ASTM A325 or A490 Bolts 2.3 ANSI/ASME Standards:10 B 1.1 Unified Screw Threads B 1.3 Screw Thread Gaging Systems for Dimensional Acceptability B 18.2.2 Square and Hex Nuts B 18.18.2M Inspection and Quality Assurance for High Volume Machine Assembly Fasteners 3. Terminology 3.1 Definitions of Terms Specific to This Standard: 3.1.1 anchor bolt—a steel rod or bar, one end of which is intended to be cast in concrete, while the opposite end is threaded and projects from the concrete, for anchoring other material to the concrete. The end cast in concrete may be either straight or provided with an anchor such as a bent hook, forged head, or a tapped or welded attachment to resist forces imposed on the anchor bolt, as required. 3.1.2 manufacturer—the manufacturer of the anchor bolt; the party that performs the cutting, bending, and threading operations. 3.1.3 producer—the manufacturer of the steel rods or bars. 3.1.4 purchaser—the purchaser of the finished anchor bolt, or his designated agent. 3.1.5 responsible party—see Section 18; this may be the manufacturer or supplier. 3.1.6 supplier—the agent who furnishes the finished anchor bolt and nuts to the purchaser; this may be the manufacturer. 4. Classification 4.1 The anchor bolts are furnished in three grades denoting minimum yield strength and two classes denoting thread class as follows: Grade Tensil strenth,ksi(Mpa) Description Yield Strength,min,ksi(Mpa) Size Range,in.(mm) 36(A) 58-80(400-558) 36(248) 1/4~4(6.4~102) 55 75~95(517~655) 55(380) 1/4~4(6.4~102) 105 125~150(862~1034) 105(724) 1/4~3(6.4~76) Class 1A anchor bolt with class 1A threads 2A anchor bolt with class 2A threads A: when grade 36 is specified, a weldable Grade 55 may be furnished at the supplier, option. 5. Ordering Information 5.1 Orders for anchor bolts should include the following information: 5.1.1 Quantity (Number of Pieces)—If the purchaser intends to perform destructive tests on finished anchor bolts, the manufacturer should be advised so that an adequate number are produced, especially for the sizes and types not readily available from stock. 5.1.2 Name of product (steel anchor bolt). 5.1.3 ASTM designation and year of issue. 5.1.4 Grade and class, that is, Grade 36, 55, or 105 and Class 1A or 2A. Weldable Grade 55 may be furnished when Grade 36 is ordered. (See 4.1.) 5.1.5 Copper, if copper bearing steel is required. 5.1.6 Size and Dimensions—include the diameter and threads (based on nominal thread diameter), bolt length, thread length, and length of hook if a hook is required, or provide a drawing showing the required information. 5.1.7 Zinc coatings in accordance with 7.1. When zinc coatings in accordance with 7.1 are required, specify the zinc coating process to be used, that is, hot dip, mechanically deposited, or no preference. (See 7.1.) Also, specify the length to be coated as measured from the exposed end. 2.2 节点规范 节点规范使用：ASTM A325 或者 A490 Bolts。 2.3 ANSI/ASME标准： B 1.1 同一的螺纹标准 B 1.3 螺纹尺寸测量系统 B 18.2.2 方螺母和六角螺母 B 18.18.2M 高容量机械组装紧固件的检测和质量保证。 3.术语说明 3.1本标准条款的解释 3.1.1锚栓：一种钢棒，一端预埋在混泥土中钢棍，另一头带螺纹以便固定其他结构物到混泥土面上。埋入混泥土的部分可能是直的也可能带有锚固附件比如：弯钩，加大头，锻件或者焊上附属构件，这种接头可以抵抗施加在锚栓上的外力。 3.1.2 制造商：锚栓的制造商；对锚栓进行切割，弯曲和螺纹加工的单位 3.1.3 生产商：提供钢棒或者钢杆的单位。 3.1.4 采购方：购买锚栓或者锚栓设计的机构 3.1.5 责任方：见第18章节；制造商或者是供应商。 3.1.6 供应商：向采购方提供锚栓成品的商家，或许是制造商。 4 等级划分 4.1 锚栓根据最小屈服强度划分为三个强度等级，根据螺纹划分两个螺纹等级： 等级 抗拉强度,ksi(Mpa) 最小屈服强度ksi(Mpa) 直径,in.(mm) 36(A) 58-80(400-558) 36(248) 1/4~4(6.4~102) 55 75~95(517~655) 55(380) 1/4~4(6.4~102) 105 125~150(862~1034) 105(724) 1/4~3(6.4~76) 螺纹等级 1A 具有1A等级的锚栓 2A 具有2A等级的锚栓 A:如果36等级的钢材标有该符号，建议供应商使用可焊55的级的钢材替代。 5. 订单信息 锚栓的订单必须包括以下信息： 5.1.1 数量（构件的数量），如果采购方打算在成品上进行破坏性试验，必须事先通知制造商，使其生产额外出额外的构件，特别是对于尺寸或者样式不容易从市场上获得的构件。 5.1.2产品的名称（钢锚栓） 5.1.3ASTM标准及其发布年份 5.1.4标明强度等级和螺纹等级即：36级，55或者105级和1A或者2A的螺纹等级。如果订单是36级的，最好事先准备可焊的55级锚栓（见4.1条） 5.1.5注明铜含量，如果钢有含铜量的要求 5.1.6注明尺寸——包括直径和螺纹线长度（根据名义直径），锚栓长度，螺纹长度，和如果有弯钩的话，弯钩的长度，或者提供一张图纸标明尺寸。 5.1.7 镀锌要求根据7.1条。当根据7.1要求进行镀锌时，要求进行特定的镀锌工艺即热浸锌，机械镀锌，或者没有要求（见7.1节）。标明要镀锌的长度即从外露头测量的距离。 5.1.8 Other Coatings—Specify other protective coatings, if required. (See 7.2.) 5.1.9 Number of nuts, either the total number or number per bolt. 5.1.10 Number of washers, either the total number or number per bolt, and dimensions if other than standard. 5.1.11 Inspection at place of manufacture, if required. (See15.1.) 5.1.12 Color coding, if different from the standard in 19.1. 5.1.13 Test reports, if required. (See 17.1.) 5.1.14 Supplementary requirements, if required. 5.1.15 Special requirements, if required. NOTE 1—An example of a typical order follows: 5000 pieces; steel anchor bolts; ASTM designations including issue date; Grade 55; Class2A; Supplementary Requirement S 1; 1.0-8-in. thread size by 15-in. long, 3.0-in. thread length, 4.0-in. hook; zinc coated by hot dipping 5.0 in. from exposed end; each with one zinc-coated nut and washer; test report required. 6. Materials and Manufacture 6.1 Process—Steel for anchor bolts shall be made by the open-hearth, basic-oxygen, or electric-furnace process. 6.2 Threading—Threads shall be rolled, cut, or ground at the option of the manufacturer, unless otherwise specified. 6.3 Heat Treatment: 6.3.1 When required, the anchor bolts may be heat treated to develop the specified properties. Heat treatment shall be at the option of the manufacturer. 6.3.2 Heat treatment may be performed prior to or after bending or threading. 6.3.3 When heat treatment is required, the anchor bolts shall be heat treated by quenching in a liquid medium from above the transformation temperature and then tempering by reheat- ing to a temperature not less than 800°F (425°C) for Grade 55 and 1100°F (593°C) for Grade 105. 6.4 Bending: 6.4.1 When required, hooks, shall be made by cold bending or hot bending. The bent portion shall be free from cracks when examined at 103 magnification after bending. 6.4.2 Hot bending performed on bar stock without heat treatment shall not have the temperature exceed 1300°F(705°C) at any location during hot bending and shall be allowed to air cool after bending. 6.4.3 Hot bending performed on heat-treated bar stock shall not have the temperature come within 100°F (56°C) of the tempering (stress relieve) temperature of the heat-treat process at any location during hot bending and shall be allowed to air cool after bending. 6.4.4 The bending shall not reduce the cross-sectional area below that required in 10.3. 6.5 Secondary Processing—If a subcontractor, or party other than the manufacturer or producer, performs heat treatment, coating, welding, machining, or other process affecting the properties or performance of the anchor bolts, the anchor bolts shall be inspected and tested after such processing by the party responsible for supplying the anchor bolts to the purchaser. 6.6 Recommended Nuts: 6.6.1 Unless otherwise specified, all nuts used on these anchor bolts shall conform to the requirements of Specification A 194 or A 563 and shall be of the grade, surface finish, and style for each grade and size of anchor bolt as follows: 5.1.8 其他保护层——如果有要求的话标明其他保护层（见7.2） 5.1.9 螺母的数量，或者螺母的总数量或者每个锚栓螺母的数量，如果尺寸同标准不同的话也要注明尺寸。 5.1.10注明垫圈的数量，或者垫圈的总数量或者每个锚栓垫圈的数量，如果尺寸同标准有冲突的话，也要注明尺寸。 5.1.11如果有要求的话进行制造现场检测（见15.1条） 5.1.12如果同19.1条有冲突的话进行颜色编码。 5.1.13如果有要求的话进行试验报告（见17.1条） 5.1.14如果有附加要求，要满足附加要求。 5.1.15如果有特殊要求的话同样要满足。 注1——订单的典型： 5000 件; 钢锚栓或者锚杆; ASTM设计规范包括发行日期; 强度55级; 螺纹等级2A; 满足附加条款S1; 直径1.0~8英寸.锚杆长15英寸, 螺纹长度3.0英寸, 弯钩长4.0英寸; 从外露头5英寸热浸镀锌; 每个螺杆配置1个螺母和垫圈; 要求试验报告. 6.材料和制作 6.1 工艺——用来做锚栓的钢材必须用平路，转炉或者电炉炼制而成。 6.2 螺纹加工——除非有特别，螺纹加工必须由制造商经过轧制，切割或者打磨而成。 6.3热处理 6.3.1当有要求时，锚杆可以进行热处理已达到特殊的材性，热处理必须有制造商完成。 6.3.2热处理可以在弯曲或者螺纹加工之前或者之后进行。 6.3.3当要求进行热处理时，这个锚栓应该从高于转变温度在一个液体介质进行猝火处理。然后再加热进行回火处理，加热的温度对于55级锚杆不能低于800°F (425°C)，对于105级锚杆不能低于1100°F (593°C) 6.4弯曲处理 6.4.1如果锚杆有弯钩要求，该锚杆必须进行冷弯或者热弯，弯曲后，在103倍放大镜下不得出现裂纹。 6.4.2在没有进行热处理的钢棒上进行热弯曲时，弯曲过程中温度任何条件下不得超过1300°F(705°C)，允许弯曲后进行空气冷却。 6.4.3在进行过热处理的钢棒上进行热弯曲是，弯曲过程中温度在任何条件下不得达到热处理温度的100°F (56°C)以内，允许弯曲后进行空气冷却。 6.4.4弯曲后的横截面积应该大于10.3的要求 6.5二次加工——如果锚栓是由分包商而不是由制作商或者生厂商完成热处理，镀锌，焊接，机械加工或者其他影响到锚杆性能的工艺，在这道工序后，这个锚杆必须有负责给采购方供应锚栓的一方进行检查。 6.6螺母的推荐 6.6.1除非有特别说明，所有用于锚杆上的螺母必须执行A 194 或者 A 563标准，而且螺母的强度等级，面层和样式及尺寸根据如下划分： Specification A563 Recommended Nut Anchor Bolt Grade and Size Plain Hot-Dip or Mechanical Zinc Coated in accordance with 7.1 Grade Size,in,(mm) Grade Style Grade Style 36 1/4~3/2(6.4~38) A Hex A Hex over3/2~4(38~102 A Heavy Hex A Heavy Hex 55 1/4~3/2(6.4~38) A Hex A Heavy Hex over3/2~4(38~102 A Heavy Hex A Heavy Hex 105 1/4~3/2(6.4~38) D Hex DH Heavy Hex over3/2~4(38~102 DH Heavy Hex DH Heavy Hex 6.6.2 The requirements for the recommended grade and style of nut may be fulfilled by furnishing a nut of one of the grades or styles listed in Specification A 194、A194M or A 563 having a proof load stress equal to or higher than the minimum tensile strength specified for the anchor bolt. 6.7 Recommended Washers: 6.7.1 The washer material and dimensions shall be specified in the inquiry and the order (see Note 2). 6.7.2 Unless the requirement of 6.7.1 is met, washers conforming to the requirements of Specification F 436, Type 1 shall be furnished. 6.7.3 When anchor bolts are specified to be zinc coated, the washers shall be zinc coated as specified in 7.1, except that the coating process for the washers need not be the same as that for the anchor bolts and nuts. NOTE 2—Washers used on anchor bolts, installed in holes with dimensions greater than oversize or short slot as defined by the Research Council on Structural Connections, require design consideration. (For guidance refer to Specification for Structural Joints Using ASTM A 325 or A 490 Bolts.) 7. Protective Coatings 7.1 Zinc, Hot Dip or Mechanically Deposited Specification A 153, Class C, and mechanically deposited, Specification B 695, Class 50. 7.1.1 When zinc-coated anchor bolts with the coating specified in 7.1 are required, the purchaser shall specify the zinc coating process, for example, hot dip, mechanically deposited, or no preference. 7.1.2 When hot-dip is specified, the fasteners shall be zinc coated by the hot-dip process in accordance with the requirements of Class C of Specification A 153. 7.1.3 When mechanically deposited is specified, the fasteners shall be zinc coated by the mechanical deposition process in accordance with the requirements of Class 50 of Specification B 695. 7.1.4 When no preference is specified, the supplier may furnish either a hot-dip zinc coating in accordance with Specification A 153, Class C, or a mechanically deposited zinc coating in accordance with Specification B 695, Class 50.Threaded components (bolts and nuts) shall be coated by the same zinc-coating process, and the supplier’s option is limited to one process per item, with no mixed processes in a lot. 7.2 Other Coatings: 7.2.1 Coatings other than the zinc coatings specified in 7.1 shall be as specified by the purchaser on the purchase order. 7.2.2 The complete specification shall be included as part of the purchase order when other coatings are specified. A563推荐的螺母 强度及其尺寸 光面 根据7.1热浸锌或机械镀锌 强度 尺寸, in,(mm) 强度 强度 强度 强度 36 1/4~3/2(6.4~38) A 六角 A 样式 超过3/2~4(38~102 A 重六角 A 六角 55 1/4~3/2(6.4~38) A 六角 A 重六角 超过3/2~4(38~102 A 重六角 A 重六角 105 1/4~3/2(6.4~38) D 六角 DH 重六角 超过3/2~4(38~102 DH 重六角 DH 重六角 6.6.2 A 194 /A194M或A 563推荐螺母的强度或者样式是否满足要求可以施加给螺母一个相等或者大于螺杆最小屈服强度的外力来验算。 6.7推荐的垫圈 6.7.1必须在答疑文件和订单中注明垫圈的材料和尺寸（见注2） 6.7.2除了满足6.7.1条款，提供的垫圈必须满足F 436，类型1的要求。 6.7.3如果锚栓标明要进行镀锌处理，那么垫圈遵循7.1条款也要进行镀锌，镀锌工艺不必同锚栓一样。 注2——当用于锚栓上的垫圈，安装的孔洞尺寸大于最大垫圈尺寸或者不能满足规范规定的填充要求时时，应该具有相应的设计依据.(参照节点设计规范ASTM A325或者A490中锚栓部分)。 7.保护层 7.1热浸锌或者机械镀锌参照A 153的C级标准，机械镀锌参照B 695的50级标准。 7.11当镀锌锚栓具备了7.1中的要求时，采购方需注明镀锌的步骤，比如：热浸锌，机械镀锌，或者不做要求。 7.1.2当采用热浸锌工艺时，紧固件的热浸锌工艺要求按照A 153的C级标准执行。 7.1.3当采用机械镀锌时，紧固件的机械镀锌工艺参照B 695的50级标准执行 7.1.4当没有选择镀锌方法时，供应商既可以采用根据A 153的C级标准执行的热镀锌或者采用按照A 153的C级标准执行机械镀锌。锚栓和螺母的螺纹必须采取相同的镀锌工艺，供货商的镀锌工艺只限于其中一种，不得混合使用镀锌工艺。 7.2 其他保护层 7.2.1 除了7.1标明的保护层外，其他保护层须在订单中标明。 7.2.2 当采用其他保护层时，需提供完整的规范。 8. Chemical Composition 8.1 Anchor bolts shall have a chemical composition conforming to the requirements listed in Table 1 for Grade 36 and Table 2 for Grades 55 and 105. 8.2 Grade 55 ordered as weldable shall conform to the requirements specified in Supplementary Requirement S1. 8.3 Anchor bolts made from low-carbon martensitic steel shall not be permitted. 8.4 The application of heats of steel to which bismuth, selenium, tellurium, or lead has been added intentionally shall not be permitted. 8.5 Product analyses may be made by the purchaser from finished anchor bolts representing each heat. The chemical composition thus determined shall conform to the requirements specified in 8.1 through 8.4. TABLE 1 Chemical Requirements for Grade 36 Element Diameter.in.(mm) To3/4(20).incl Over3/4to3/2(20to40),incl Over3/2to4(40to100),incl) Carbon,max.% 　 　 　 Heat 0.26 0.27 0.28 Product 0.29 0.3 0.31 Manganese,% 　 Heat A .6-.9 .6-.9 Product A .54-.98 .54-.98 Phosphorus,max.% 　 Heat 0.04 0.04 0.04 Product 0.05 0.05 0.05 Sulfur,max.% 　 Heat 0.05 0.05 0.05 Product 0.06 0.06 0.06 Copper,min,%(when specified) 　 Heat 0.2 0.2 0.2 Product 0.18 0.18 0.18 A:Option with manufacture but shall be compatible with weldable steel TABLE2 Chemical Requirements for Grades 55 and 105 Element Composition.% Heat Analysis Product Phosphorus,max 0.04 0.048 Sulfur,max 0.05 0.058 Copper,min, (when specified) 0.2 0.18 9. Mechanical Properties 9.1 Bars—The bars or rods from which the anchor bolts are made shall conform to the tensile properties listed in Table 3, except when heat treated after bending or threading. 9.2 Anchor Bolts—The finished anchor bolts shall conform to the tensile properties listed in Table 3 for tests on machined specimens and Table 4 for axial tests on full-size threaded anchor bolts. 8 化学组成 8.1 锚栓必须有化学组成必须满足表1（36级）或表2（55级和105级） 8.2 55级锚栓有可焊性要求时，须满足附属条款S1的要求。 8.3 锚栓不能用低碳马氏体钢制造。 8.4 不想允许向热炉中人为的加入铋，碲，硒，铅等合金元素。 8.5 采购方可以从锚栓成品中对每一炉做出产品分析，化学成分必须满足8.1~8.4的要求。 表1：36级钢材的化学元素要求 元素 尺寸.in.(mm) <=3/4(20).incl >3/4 3/2<=(20到40),incl >3/2到4(40到100),incl) 最大碳含量.% 　 　 　 炉中 0.26 0.27 0.28 产品 0.29 0.3 0.31 锰含量,% 　 炉中 A 0.6-0.9 0.6-0.9 产品 A 0.54-0.98 0.54-0.98 最大磷含量.% 　 炉中 0.04 0.04 0.04 产品 0.05 0.05 0.05 最大硫含量,max.% 　 炉中 0.05 0.05 0.05 产品 0.06 0.06 0.06 最小铜含量%(有要求时) 　 炉中 0.2 0.2 0.2 产品 0.18 0.18 0.18 A:制造商选择，但是要满足可焊性要求。 表2：55级和105级钢材的化学元素要求 元素 组成.% Heat Analysis Product 最大磷含量 0.04 0.048 最大硫含量 0.05 0.058 最小铜含量 (有要求时) 0.2 0.18 9 机械性能 9.1 钢棒——制作锚栓的钢棒或者钢条，必须满足表3中的抗拉性能，弯曲处理和螺纹加工后进行热处理的情况除外。 9.2 锚栓——锚栓成品表三要求的试验性能，同时在螺纹拧紧的情况下还必须满足表4中的轴拉性能。 TABLE3 Tensile Properties for Bars and Machined 　 Grade 36 55 105 Tensile strength,ksi 58-80 75-95 125-150 Tensile strength,Mpa (400-552) (517-655) (862-1034) Yiesd Strength,ksi(0.2% offset) 36 55 105 Yiesd Strength,MPa(0.2% offset) 248 380 724 Elongation in 8 in.(200mm),%(A) 20 18 12 Elongation in 2 in.(50mm),%(A) 23 21 15 Reduction of Area,min,% 　 　 　 1/4 to 2 in.(6.4 to 50mm).incl 40 30 45 over 2 to 5/2in.(50 to 63mm).incl 40 22 -45 over5/2 to 3in.(63 to 76),incl 40 20 45 over 3 to 4 in.(76 to 102 mm),incl 40 18 …