ASTM A403 Standard specification covers the standard for wrought austenitic stainless steel fittings for pressure piping applications. ASTM A403 / A403M Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings.

ASTM A403 WPL6 Elbow after complete quality and performance measure inspection. These are widely appreciated for excellent quality, corrosion abrasion and high tensile strength with long life service.

The material for fittings shall consist of forgings, bars, plates, or seamless or welded tubular products. Forging or shaping operations shall be performed by hammering, pressing, piercing, extruding, upsetting, rolling, bending, fusion welding, machining, or by a combination of two or more of these operations. All fittings shall undergo heat-treatment. Chemical and product analyses shall be performed and shall conform to the required chemical composition in carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, and titanium. Tension test shall be done on the fitting material to determine the tensile properties such as yield strength and tensile strength. Fittings supplied under this specification shall be examined visually for surface discontinuities, surface checks, and mechanical marks.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

ASTM A403标准规范涵盖了压力管道应用中锻造奥氏体不锈钢配件的标准。ASTM A403/A403M锻造奥氏体不锈钢管道配件标准规范。

ASTM A403 WPL6弯管在完成质量和性能测量检查后。这些产品因其卓越的质量、耐腐蚀磨损和高抗拉强度以及长寿命而受到广泛赞赏。

配件的材料应由锻件、棒材、板材或无缝或焊接的管状产品组成。锻造或成形操作应通过锤击、压制、穿孔、挤压、镦粗、轧制、弯曲、熔焊、机加工或通过两种或多种操作的组合进行。所有配件应进行热处理。应进行化学和产品分析，并应符合碳、锰、磷、硫、硅、铬、钼和钛的所需化学成分。应对配件材料进行拉伸试验，以确定屈服强度和抗拉强度等拉伸性能。应目视检查根据本规范提供的配件的表面不连续性、表面检查和机械痕迹。

本摘要是对参考标准的简要总结。它仅供参考，不是标准的官方部分；使用和应用时必须参考标准本身的全文。ASTM不提供任何明示或暗示的保证，也不表示本摘要的内容是准确、完整或最新的。

Wrought Austenitic Stainless Steel Piping Fittings锻造奥氏体不锈钢管道配件

Materials shall consist of forgings, bars, plates, seamless or fusion welded tubular products with filler metal added, and shall be produced by open-hearth, basic-oxygen, or electric-furnace process. Forging or forming operations shall be performed by one or a combination of two or more of the following procedures: hammering, pressing, piercing, extruding, upsetting, working, bending, fusion-welding, or machining. All welding shall be completed prior to the austenitizing heat treatment, which shall be executed in the normalized, normalized and tempered, annealed, or quenched and tempered conditions. Steel specimens shall conform to required values of chemical composition, tensile strength, yield strength, elongation, wall thickness, and Charpy V-notch impact value. All fusion-welded butt joints shall undergo radiographic examination, while hydrostatic testing of fittings is not required in this specification. Repair welding shall be permissible for parts made to dimensional standards.

材料应由锻件、棒材、板材、添加了填充金属的无缝或熔焊管状产品组成，并应通过平炉、碱性氧气或电炉工艺生产。锻造或成形操作应通过以下一种或两种或多种程序的组合进行：锤击、压制、刺穿、挤压、镦粗、加工、弯曲、熔焊或机加工。所有焊接应在奥氏体化热处理之前完成，该热处理应在正火、正火和回火、退火或淬火和回火条件下进行。钢试样应符合化学成分、抗拉强度、屈服强度、伸长率、壁厚和夏比V型缺口冲击值的要求值。所有熔焊对接接头应进行射线检测，而本规范中不要求对配件进行静水压试验。对于按照尺寸标准制造的零件，应允许进行补焊。

What is the ASTM A403?什么是ASTM A403?

ASTM A403 Stainless Steel Pipe Fittings refers to the material of forged and rolled austenitic stainless fittings for pressure pipes. Common grades are WP304/L, WP316/L. They can be used into many fields as engineering industry, energy conversion plants etc.

ASTM A403 Standard specification covers the standard for wrought austenitic stainless steel fittings for pressure piping applications.

ASTM A403不锈钢管件是指压力管道用锻造和轧制奥氏体不锈钢管件的材料。常见的牌号有WP304/L、WP316/L。它们可用于工程工业、能源转换厂等许多领域。

ASTM A403标准规范涵盖了压力管道应用中锻造奥氏体不锈钢配件的标准。

Chemical Composition (%) of ASTM A403的化学成分（%）

Notes:

For each reduction of 0.01% below the specified C maximum, an increase of 0.06% Mn above the specified maximum will be permitted, up to a maximum of 1.35%.

The sum of Cu, Ni, Cr, and Mo shall not exceed 1.00%.

The sum of Cr and Mo shall not exceed 0.32%.

The maximum carbon equivalent (C.E.) shall be 0.50, based on heat analysis and the formula C.E.=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15.

笔记：

对于低于规定C最大值0.01%的每一次减少，将允许高于规定最大值0.06%的Mn增加，最高可达1.35%。

铜、镍、铬和钼的总和不得超过1.00%。

铬和钼的总和不得超过0.32%。

根据热分析和公式C.E.=C+Mn/6+（Cr+Mo+V）/5+（Ni+Cu）/15，最大碳当量（C.E.）应为0.50。

Mechanical properties of ASTM A403的机械性能

Material Furnished to this specification shall conform to the requirements of specifications A960/A960M including any supplementary requirements that are indicates in the purchase order. Failure to company with the common requirements of Specification A960/A960M constitutes non-conformance with this specification . In case of conflict between this specification and Specification A960/A960M , this specification shall prevail.

根据本规范提供的材料应符合规范A960/A960M的要求，包括采购订单中指明的任何补充要求。不符合规范A960/A960M的共同要求构成不符合本规范。如果本规范与规范A960/A960M之间存在冲突，应以本规范为准。

What grade of steel is ASTM A403?ASTM A403是什么等级的钢？

The standard includes several grades of austenitic stainless steel alloys, and uses the WP or CR prefix to mark the grade of steel, depending on the applicable ASTM or MSS size and rated pressure standards. ASTM A403 is designed for forged steel pipe fittings, Cast pipe fittings are not suitable.

该标准包括几种等级的奥氏体不锈钢合金，并使用WP或CR前缀来标记钢的等级，具体取决于适用的ASTM或MSS尺寸和额定压力标准。ASTM A403是为锻钢管件设计的，铸造管件不适用。