ASTM A851 / ASME SA851 / High Frequency Induction Welded Unannealed Austenitic Steel Condenser Tubes supplier & distributor in India

ASTM A851-88 / ASME SA 851

HIHG FREQUENCY INDUCTION WELDED UNANNEALED AUSTENITIC
STEEL CONDENSER TUBES

This standard is issued under the fixed designation A 851; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon ( ε) indicates an editorial change since the last revision or reapproval.

1.Scope

1.1 This specification covers nominal-wall-thickness tubes intended for use as steam surface condenser tubes. These tubes are made from the austeitic steels listed in Table1 using a high-frequency induction welding process here post-weld solution heat treatment is not necessary for corrosion resistance.

1.2 The tubing sizes covered shall be 5/8 to in. (15.9 mm) to 3 1/8 in.(79.4 mm) in outside diameter and 0.015 to 0.019 in. (0.40 to 2.8 mm), inclusive, in wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.

1.3 Optional supplementary requirements are provided in this spcification and, when one or ore of these are desired, each shall be so states in the order.

1.4 The values stated in inch-pound units are to be regarded as the standard.

Chemical composition

Grade	Mfg. Process	Chemical composition(%)
Grade	Mfg. Process	C	Si	Mn	P	S	Ni	Cr	Mo	Others
TP304	E, W	0.08Max	0.75Max	2.00Max	0.040Max	0.030Max	8.00~11.0	18.0~20.0	-	-
TP304L	E, W	0.08Max	0.75Max	2.00Max	0.040Max	0.030Max	8.00~11.0	18.0~20.0	-	-

Mechanical Properties

Grade	Tensile Test MPa or N/mm2		Remaks (Similar to JIS)	Possibility Temperature
Grade	Min Yield point	Tensile Strength	Remaks (Similar to JIS)	Possibility Temperature
TP304	205	515	-
TP304L	170	485	-

TABLE 1 Chemical Requirements

Composition, %
Grade :	TP 304	TP 304L
UNS DesignationA	S30400	S30403
Carbon, max	0.08	0.030
Manganese, max	2.00	2.00
Phosphorus, max	0.040	0.040
Sulfur, max	0.030	0.030
Silicon, max	0.75	0.75
Nickel	8.00-11.0	8.00-13.00
Chromium	18.0-20.0	18.0-20.0

ANew designation established in accordance with ASTM-E-527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS).
NOTE 1-For Product Analysis requriements, the term lot applies to all tubes, prior to cutting, of the same nominal size and
wall thickness that are produced from the same heat of steel.

TABLE 2 Tensile Requirements

Grade	UNS Designation	Tensile Strength min. ksi(MPa)	Yield Strength min. ksi(MPa)	Elongation, in 2 in. or 50 mm, min, %
TP 340	S30400	75 (515)	30 (205)	35
TP 304L	S30403	70 (485)	25 (170)	35

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