ASTM A519 Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing.

ASTM A519无缝碳素钢和合金钢机械管标准规范。
ASTM A519 specification covers for several grades of carbon and alloy steel mechanical tubing, either hot-finished or cold-finished. The steel used in the mechanical tubing may be cast in ingots or may be strand cast. When steel of different grades is sequentially strand cast, identification of the resultant transition material is required. The seamless tubing is a tubular product made without a welded seam. It is usually manufactured by hot working steel, and if necessary, by subsequently cold finishing the hot-worked tubular product to produce the desired shape, dimensions and properties. The tubes shall be furnished in the following shapes: round, square, rectangular and special sections. Heat analysis shall be made to determine the percentages of the elements specified. If secondary melting processes are used, the heat analysis shall be obtained from one remelted ingot or the product of one remelted ingot of each primary melt. The tubing shall be coated with a film of oil before shaping to retard rust when specified

ASTM A519规范涵盖了几种等级的碳钢和合金钢机械管，无论是热加工还是冷加工。机械管中使用的钢可以铸造成锭，也可以是铸坯。当不同等级的钢按顺序铸坯时，需要对所得过渡材料进行标识。无缝管是一种没有焊缝的管状产品。它通常由热加工钢制成，如有必要，随后对热加工的管状产品进行冷加工，以产生所需的形状、尺寸和性能。管子应提供以下形状：圆形、方形、矩形和特殊截面。应进行热分析，以确定规定元素的百分比。如果使用二次熔炼工艺，则应从每个一次熔体的一个重熔锭或一个重熔钢锭的产品中获得热分析。在规定的情况下，管子在成型前应涂上一层油，以延缓生锈

What is ASTM A519?  ASTM A519是什么？

ASTM A519 covers several grades of carbon and alloy steel seamless mechanical tubing. The standard is also acceptable in the manufacture of piping. It is manufactured by hot working and then cold finishing the steel into round, square, rectangle or special shapes.

ASTM A519涵盖了几种等级的碳钢和合金钢无缝机械管。该标准在管道制造中也是可接受的。它是通过热加工，然后将钢冷加工成圆形、方形、矩形或特殊形状而制成的。

Scope范围

ASTM A519 specification covers several frades of carbon and alloy steel seamless mechanical tubing.

ASTM A519规范涵盖了碳钢和合金钢无缝机械管的几种框架。

1. 1. The frades anr listed in Tables 1, 2, and 3. When welding is used for joining the weldable mechanical tube grades, the welding procedure shall be suitable for the frade, the condition of the components, and the intended service.

1.1表1、2和3中列出了压裂液。当焊接用于连接可焊接的机械管等级时，焊接工艺应适用于框架、部件状况和预期用途。

1. 2. This specification covers both seamless hot-finished emchanical tubing and seamless cold-finished mechanical tubing in sizes up to and including 12 3/4 in.(322.8mm) outside diameter of rround tubes with wall thicknesses as required.

1.2本规范涵盖了无缝热加工电磁管和无缝冷加工机械管，尺寸最大为12 3/4英寸（322.8mm）外径，壁厚符合要求。

1. 3. The tubes shall be furnished in the following shapes, as specified by the purchaser:round, square, rectagular, and special sections.

1.3管子应按买方规定的以下形状提供：圆形、方形、矩形和特殊截面。

1. 4. Supplementary requirements of an optional nature are provided and when desired shall be so stated in the order.

1.4提供了可选性质的补充要求，如有需要，应在订单中注明。

Reference documents参考文件

• ASTM A370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products.·
• ASTM A370钢制品机械试验的标准试验方法和定义。
• ASTM A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products.·
• ASTM A751钢制品化学分析的试验方法、规程和术语。
• ASTM A1040 Guide for Specifying Harmonized Standard Grade Compositions for Wrought Carbon, Low-Alloy, and Alloy Steels.
• ASTM A1040《锻造碳钢、低合金钢和合金钢协调标准等级成分指定指南》。
• ASTM A1058 Test Methods for Mechanical Testing of Steel Products – Metric.·
• ASTM A1058钢制品机械试验方法——公制。

Related ASTM A519相关ASTM A519

• ASTM A519 4130 Seamless Pipe·ASTM A519 4130无缝管
• ASTM A519 SAE 1026 Seamless Tubing·ASTM A519 SAE 1026无缝管

• ASTM A519 carbon and alloy steel mechanical tubing·ASTM A519碳钢和合金钢机械管
• ASTM A519 AISI 4140 Tubes·ASTM A519 AISI 4140管材

Note:

• DN — Nominal Diamete  rDN——公称直径
• NPS —Nominal Pipe Size·NPS——公称管道尺寸

Chemical composition (%) of ASTM A519  ASTM A519的化学成分（%）

Mechanical Properties of ASTM A519  ASTM A519的机械性能

What is the strength of ASTM A519? ASTM A519的强度是多少？

ASTM A519 Grade 1026 Seamless Tubes Designation 4130 Tensile/ Mechanical Properties: Hot Rolled Ultimate Strength 90 ksi, 621 Mpa, Yield Strength 70 ksi, 483 Mpa and hardness 89. Stress Relieved Ultimate Strength 105 ksi, 724 Mpa, Yield Strength 85 ksi, 586 Mpa and hardness 95.

ASTM A519 1026级无缝管牌号4130拉伸/机械性能：热轧极限强度90ksi，621Mpa，屈服强度70ksi，483Mpa，硬度89。应力释放极限强度105ksi，724Mpa，屈服强度85ksi，586Mpa，硬度95。

ASTM A519 seamless carbon steel precision mechanical tubing  ASTM A519无缝碳钢精密机械管

ASTM A519 seamless carbon steel precision mechanical tubing finds applications in various industries, including automotive, machinery, construction, and transportation. It is commonly used for the production of components such as bushings, bearings, cylinders, and shafts.

ASTM A519无缝碳钢精密机械管在汽车、机械、建筑和运输等各个行业都有应用。它通常用于生产衬套、轴承、气缸和轴等部件。