ASTM B423 / ASME SB423 / Nickel Iron Chromium Molybdenum Copper Alloy (UNS N08825 AND N08221) Seamless Pipe and Tube supplier & distributor in India

ASTM B-423-84 / ASME SB-423
SPECIFICATION FOR NICKEL IRON CHROMIUM MOLYBDENUM COPPER ALLOY
(UNS N08825 AND N08221) SEAMLESS PIPE AND TUBE

1.Scope

1.1 This specification covers nickel-iron-chirmium-molybdenum-copper alloys (UNS N08825 and UNS N 082221) in the foem of cold-worked and hot-fianished deamless pipe and tube intended for general corrosive sevic coverd in Spdcificarion B 89.

1.2 The following precautionary caveat pertains only to the test methods portion, Section 9, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the reaponsibility of the user of this standard to establish appropriate safety and hwalth practices and determine the applicability of reguatory limitations prior to use.

TABL1 CHEMICAL REQUIREMENTS

Element	UNS N08825	UNS N08221
Nickel	38.0-46.0	39.0-46.0
Chromium	19.5-23.5	20.0-22.0
Iron	22.0min	22.0min
Manganese	1.0max	1.0max
Carbon	0.05max	0.025max
Copper	1.5-3.0	1.5-3.0
Silicon	0.5max	0.5max
Sulfur	0.03max	0.03max
Aluminum	0.2max	0.2max
Titanium	0.6-1.2	0.6-1.0
Molybdenum	2.5-3.5	5.0-6.5

TABLE 2 MECHANICAL PROPERTIES OF PIPE AND TUBE

Alloy	Condition and Size	Tensile Strength, min, ksi(MPa)	Yield Strength 0.2% Offset, min, ksi(MPa)	Elongation in 2 in. or 50 min(4D), min, %
UNS N08825	hot-finished annealde	75(517)	25(172)	30
UNS N08825	cold-worked annealed	85(586)	35(241)	30
UNS N08825	hot-forming quality(hot-finished or cold-drawn annealed)	A	A	A
UNS N08221	cold-finished, annealed	79(545)	34(234)	30

AHvot-forming quality is furnished to chemical requirements and surface inspection only.
No mechanical properties are required.

TALBE3 PERMISSIBLE VARIATIONS FOR OUTSIDE DIAMETER AND WALL THICKNESS
OF SEAMLESS HOT-WORKED PIPE AND TUBEA, B

Nominal Outside Diameter in.(mm)	Permissible Variations
	Outside Diameter, in.(mm)		Thickness of Specified Nominal Wall, %		Thickness of Specified Minimum Wall, %
	+	-	+	-	+	-
2 1/2(64) to 4 1/2(114), incl	0.031(0.79)	0.031(0.79)	16.0	12.5	28.5	0
Over 4 1/2(114) to 6 1/2(165), incl	0.047(1.2)	0.047(1.2)	16.0	12.5	28.5	0
Over 6 1/2(165) to 9 1/4(235), incl	0.062(1.6)	0.062(1.6)	16.0	12.5	28.5	0

AOvality-For tube 5 in.(127mm) and under in outside diameter, the tolerance on the outside diameter applies for individual measurements and includes ovality. For tube over 5 in.(127mm) in outside diameter, the mean outside diameter shall conform to the permissible variations of this table and individual measurements shall not exceed twice the permissible variations of this table. BEccentricity-The permissible variations in tihs tale apply to individual measurements including eccentricity.

APPENDIXES (Nonmandatory Information) X2. CONDITIONS AND FINISHES NORMALLY SUPPLIED

X2.1 Scope

X2.1.1 This appendix lists the conditions and finishes in which pipe and tube (other than converter sizes) are normally supplied. These are subject to change, and the manufacturer should be consulted for the latest information available.

X2.2 Cold-Worked Tube and Pipe

X2.2.1 Cold-Wroked, Annealed, With Ground Outside Diameter - The inside diameter may have a bright finish when material is annealed in a protective atmosphere; otherwise, the inside diameter is supplied descaled as necessary. It is avable in sizes 1/2 to 4 in. (12.7 to 102mm), inclusive, in outside diameter in both normal and heavy-wall tube, and pipe sizes, all schedules, of corresponding outside-diameter dimensions.

X2.2.2 Cold-Worked, Annealed, and Pickled (Not Ground) - Outside and inside diameter will have dull, matte (pickled) surfaces. It is available in sizes 1/2 to 6 5/8 in. (12.7 to 168 mm) inclusive, in outside diameter in both normal and heavy-wall tube, and pipe sizes, all schedules, of corresponding outside diameter dimensions.

X2.3 Hot-Worked Tube

X2.3.1 Hot-Worked-Annealed, (Not Pickled) Tube - Has an oxide surface resulitng from the hotworking operation. Intended generally for machined parts where the oxide surface will be removed.

X2.3.2 Hot-Worked-Annealed, (Pickled) Tube - Has the oxide surface removed on both the outside and inside diameters by picking. Surface may be spot ground for removal of minor surface imperfections at the manufacturer's opion.

X2.3.3 Hot-Worked-Annealed (Machined Outside and Inside Diameters) Tubes - The outside and inside diameter surfaces are machined to specified dimensions.

Minor surface imperfections may be spot ground for removal, at the manufacturer's option.

Grade	Mfg. Process	Chemical composition(%)
Grade	Mfg. Process	C	Si	Mn	P	S	Ni	Cr	Mo	Others
N08825	S	0.05Max	0.5Max	1.0Max	-	0.03Max	38.0~46.0	19.5~23.5	2.5~3.5	Fe 22.0Min Cu 1.5~3.0 Al 0.2Max Ti 0.6~1.2
N08821	S	0.25Max	0.5Max	1.0Max	-	0.03Max	38.0~46.0	20.0~22.0	5.0~6.5	Fe 22.0Min Cu 1.5~3.0 Al 0.2Max Ti 0.6~1.2

Grade	Mfg. Process	Chemical composition(%)
Grade	Mfg. Process	C	Si	Mn	P	S	Ni	Cr	Mo	Others
N08800	S	0.10Max	0.015Max	1.5Max	-	0.015Max	30.0~35.0	19.0~23.0	Fe 39.5Min	AL 0.15~0.60 Ti 0.15~0.60
N08810	S	0.05~0.10	0.015Max	1.5Max	-	0.015Max	30.0~35.0	19.0~23.0	Fe 39.5Min	AL 0.15~0.60 Ti 0.15~0.60
N08811	S	0.06~0.10	0.015Max	1.5Max	-	0.015Max	30.0~35.0	19.0~23.0	Fe 39.5Min	AL 0.15~0.60 Ti 0.15~0.60

Grade	Tensile Test MPa or N/mm2				Remaks (Similar to JIS)	Possibility Temperature
	Hot-Worked	Cold-Worked	Hot-Worked	Cold-Worked
N08800	170	205	450Min	520Min	(NCF800TP) (NCF800TB)
N08810	170		450Min
N08811	170		450Min

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