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» Pipe & Tube » ASTM A213 TP304/ TP304L Tubes

ASTM A213 TP304/ TP304L Tubes

October 26, 2020

Sizes & Wall Thicknesses

ASTM A213 TP304L seamless tubes

ASTM A213 Gr. TP304L seamless tubes for a heat exchanger constructed in Belarus, 19.05 mm (o.d) x 2.77 mm (w.t) x 4454 mm (l).

Stainless steel 304/ 304L seamless boiler tubes, superheater tubes, and heat-exchanger tubes shall be made of ASTM A213 Grade TP304/ TP304L steels. The tubing sizes and thicknesses usually furnished to this specification are 1/8″ in inside diameter to 5″ in outside diameter and 0.015″ to 0.500″, inclusive, in minimum wall thickness or, if specified in the order, average wall thickness. Generally, the permissible variations (tolerances) of wall thicknesses shall be controlled within ±10%.

Manufacture & Heat Treatment

Seamless tubes of ASTM A213 TP304/ TP304L shall be made by either a cold-drawn or a hot-rolled process. The tubes shall be solution annealed at the temperature no less than 1900°F [1040°C], followed by a quench in water or by other rapid cooling means.

Chemical Composition Requirements

ElementTP304, %TP304L, %
C≤0.08≤0.035
Mn≤2.00≤2.00
P≤0.045≤0.045
S≤0.030≤0.030
Si≤1.00≤1.00
Cr18.0-20.018.0-20.0
Ni8.0-11.08.0-12.0
*ASTM A213 TP304: UNS S30400; ASTM A213 TP304L: UNS 30403.

Tensile & Hardness Requirements

Mechanical
Requirements
TP304TP304L
Tensile Strength,
min. MPa [ksi]
515 [75]485 [70]
Yield Strength,
min. MPa [ksi]
205 [30]170 [25]
Elongation in
2", min. %
3535
Brinell Hardness
max. HBW
192192
Vickers Hardness
max. HV
200200
Rockwell Hardness
max. HRB
9090
*All values shall be tested at room temperature.

Installation Requirements & Surface Conditions

The ASTM A213 TP304/ TP304L seamless tubes, when inserted in a boiler or tube sheet, shall stand expanding and beading without showing cracks or flows. When properly manipulated, the tubes shall stand all forging, welding, and bending operations necessary for application without developing defects. The tubes shall be pickled free of scale. When bright annealing is used, pickling is not necessary.

Tests & Inspection

One flattening test and one flaring test shall be made on specimens from each end of one finished tube for each heat lot. Other tests and inspection include: tensile test, hardness test, eddy-current test, dimensional inspection and visual examination.

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