ASTM A213 T5 Alloy Steel Seamless Round Tube Pipe Hot Finished

ASTM A213 T5 Alloy Steel Seamless Round Tube Hot Finished

Alloy steel is a type of steel that is intentionally blended with various elements to enhance its mechanical properties. These elements are added in amounts ranging from 1.0% to 50% by weight. Alloy steels are classified into two groups: low-alloy steels and high-alloy steels. The specific differentiation between the two groups can vary. Some sources, like Smith and Hashemi, define the distinction at 4.0%, while others, like Degarmo et al., define it at 8.0% [1][2]. In most cases, when people refer to "alloy steel," they are referring to low-alloy steels.

Technically, every steel is an alloy, but not all steels are referred to as "alloy steels." The most basic form of steel is iron (Fe) alloyed with carbon (C) in varying amounts (typically 0.1% to 1%, depending on the type). However, the term "alloy steel" is generally used to describe steels that intentionally include additional alloying elements alongside carbon. Common alloying elements include manganese (the most common), nickel, chromium, molybdenum, vanadium, silicon, and boron. Less common alloying elements include aluminum, cobalt, copper, cerium, niobium, titanium, tungsten, tin, zinc, lead, and zirconium.

Alloy steels offer a range of improved properties compared to carbon steels. These properties include increased strength, hardness, toughness, wear resistance, corrosion resistance, hardenability, and hot hardness. Achieving some of these improved properties may require heat treatment of the metal.

In summary, alloy steel is a specific type of steel that contains intentional additions of alloying elements to enhance its performance characteristics. It offers a wide range of improved properties compared to carbon steels, making it suitable for various applications across industries.

ASME SA213 T5 Alloy Steel Seamless Pipe Range

ASME Sa213 T5 Seamless Tubes

Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes

1.1 This specification covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes, designated Grades T91, TP304, etc. These steels are listed in Tables 1 and 2.

1.2 Grades containing the letter, H, in their designation, have requirements different from those of similar grades not containing the letter, H. These different requirements provide higher creep-rupture strength than normally achievable in similar grades without these different requirements.

1.3 The tubing sizes and thicknesses usually furnished to this specification are 1/8 in. [3.2 mm] in inside diameter to 5 in. [127 mm] in outside diameter and 0.015 to 0.500 in. [0.4 to 12.7 mm], inclusive, in minimum wall thickness or, if specified in the order, average wall thickness. Tubing having other diameters may be furnished, provided such Tubes comply with all other requirements of this specification.

1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.

TABLE 1 Chemical Composition Limits, %A, for Low Alloy SteelA Maximum, unless range or minimum is indicated. Where ellipses (…) appear in this table, there is no requirement, and analysis for the element need not be determined or reported.

B It is permissible to order T2 and T12 with a sulfur content of 0.045 max. See 16.3.

C Alternatively, in lieu of this ratio minimum, the material shall have a minimum hardness of 275 HV in the hardened condition, defined as after austenitizing and cooling to room temperature but prior to tempering. Hardness testing shall be performed at mid-thickness of the product. Hardness test frequency shall be two samples of product per heat treatment lot and the hardness testing results shall be reported on the material test report.

ASME Sa213 T5 Alloy Steel Seamless Tubes chemical compositions

ASME Sa213 T5 Seamless Tubes Permissible Variation in Wall Thickness