» Technical » ASTM A213 TP316L Seamless Tubes

ASTM A213 TP316L Seamless Tubes

July 9, 2021

Classification, Characteristics & Corrosion Resistance

ASTM A213 Gr. TP316L seamless tubes can be further classified as TP316L boiler tubes, TP316L superheater tubes, and TP316L heat exchanger tubes, according to the service it is used for. The tubing is usually specified by outside diameter and minimum wall thickness, or average wall thickness. Sometimes the wall thicknesses are specified by Birmingham Wire Gauge (B.W.G) numbers.

ASTM A213 TP316L tubing 3/4"

ASTM A213 Gr. TP316L seamless tubes, (o.d.)19.05 mm x (w.t.)1.65 mm x (l)1503 mm.

Grade TP316L of ASTM A213 has the nominal composition of 16Cr-12Ni-2Mo with UNS designation of S31603. It is the modified version of the most common TP304 stainless steel with addition of molybdenum, increased nickel content and lower chromium content. The addition of molybdenum in TP316L provides pitting resistance in phosphoric and acetic acids and dilute chloride solutions, as well as corrosion resistance in sulfurous acid (H2SO3). As an extra-low-carbon stainless steel, TP316L is resistant to carbide precipitation in the 425°C to 870°C [800°F to 1600°F] range and can thus undergo normal welding without reduction in corrosion resistance. However, when it is heated and held in the sensitizing temperature range for an extended/ prolonged period, chromium carbides precipitate in significant quantities. This leads to the susceptibility of the steel to intergranular corrosion. Thus, ASTM A213 TP316L tubing is generally recommended for use below 425°C [800°F].

Chemical Composition Requirements

Element% by Mass
*For product analysis of ASTM A213 TP316L.

Mechanical Properties

Tensile & Hardness TestsRequirements
Tensile Strength
min. MPa [ksi]
485 [70]
Yield Strength
min. MPa [ksi]
170 [25]
Elongation in
2", min. %
Brinell Hardness
max. HBW
Vickers Hardness
max. HV
Rockwell Hardness
max. HRB
*Tensile & hardness requirements for ASTM A213 TP316L tubing.

Manufacture, Heat Treatment, Delivery Conditions

SS tube cold rolling mill

The precision cold-rolling mill for the production of stainless steel seamless pipes & tubes, imported from SMS MEER (Germany), courtesy of TISCO.

Similar to the production process of ASTM A213 TP316Ti seamless tubing, TP316L seamless tubing shall be made by the seamless process and shall be either hot finished or cold finished. The tubes shall be furnished with solution annealing heat treatment: the tubing shall be soaked in furnace at the minimum temperature 1900°F [1040°C] for long enough period to achieve full austenitization. It shall be subsequently quenched in cold water. The ASTM A213 TP316L tubing may be furnished in several delivery conditions depending on clients’ requirements: solution annealed and pickled; solution annealed, pickled and then polished; bright annealed.

Application in ASME Codes

ASME Boiler & Pressure Vessel Codes
TableSectionMax. Temperature
Table 1AI850°F
III - Cl.2 & 3800°F
VIII - Div.1850°F
Table 2AIII Div.1 Cl.1 & MC800°F
VIII Div.2 Cl.1800°F
Table 5AVIII Div.2800°F
Table 6AIV500°F
*The application of ASTM A213/ ASME SA-213 TP316L seamless tubing in ASME Boiler & Pressure Vessel Codes and the maximum temperature limits, according to ASME BPVC Section II Part D.

In addition, both ASME B31.1 – Power Piping and ASME B31.3 – Process Piping have endorsed the use of ASTM A213 TP316L seamless tubing. ASME B31.1 has specified the lower and upper design temperature limits as 100°F and 1200°F, respectively. ASME B31.3 has specified the minimum design temperature without impact testing requirement and the maximum design temperature as -425°F and 1500°F. Although the Codes permit the use of TP316L tubing at higher temperatures, it is always used for services below 425°C [800°F] in practice.

Maybe you like also


    We have been dedicating ourselves to piping and pipeline engineering since the inception. The company provides integrated solution to package supply of various piping & pipeline materials, components, and equipment.


    Room 502, No.448 Heping West Road, Shijiazhuang, Hebei Province, China
    Tel: +86-311-67906676
    Fax: +86-311-67906676
    Email:  sales@pipingpipeline.com
    Whatsapp: 0086-15076331069

  • Service
    Work Time: 8:30-18:00
    Welcome to contact us at your best convenience.