Nickel-Iron-Chromium-Molybdenum-Copper Alloy Seamless Pipe and Tube B423 Archives

Nickel-Iron-Chromium-Molybdenum-Copper Alloy Seamless Pipe and Tube B423

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Nickel-Iron-Chromium-Molybdenum-Copper Alloy (UNS N08825, N08221, and N06845) Seamless Pipe and Tube B423
Standard Specification for Nickel-Iron-Chromium-Molybdenum-Copper Alloy (UNS N08825, N08221, and N06845) Seamless Pipe and Tube This standard is issued under the fixed designation B423; 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 (e) indicates an editorial change since the last revision or reapproval.


Scope
This specification covers nickel-iron-chromium- molybdenum-copper alloys (UNS N08825, N08221, and N06845) in the form of cold-worked and hot-finished seamless pipe and tube intended for general corrosive service. The general requirements for pipe and tube are covered in Specification B829. The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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 responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.






Chemical Composition
The material shall conform to the composition limits specified. One test is required for each lot as defined in Specification B829. If a product (check) analysis is performed by the purchaser, the material shall conform to the product (check) analysis variations of Specification B829.

Chemical Requirements^A
Element	UNS N08825		UNS N08221		UNS N06845
Nickel	38.0-46.0		39.0-46.0		44.0-50.0
Chromium	19.5-23.5		20.0-22.0		20.0-25.0
Iron	22.0 min^B		22.0 min^B		remainder^B
Manganese	1.0		1.0		0.5
Carbon	0.05		0.025		0.05
Copper	1.5-3.0		1.5-3.0		2.0-4.0
Silicon	0.5		0.5		0.5
Sulfur	0.03		0.03		0.010
Aluminum	0.2		0.2
Titanium	0.6-1.2		0.6-1.0
Molybdenum	2.5-3.5		5.0-6.5		5.0-7.0
Tungsten					2.0-5.0
^A Maximum unless range or minimum is given. Where ellipses (…) appear in this table, there is no requirement and analysis for the element need not be determined or reported. ^B Element shall be determined arithmetically by difference.

Mechanical Properties and Other Requirements
Tension Test—The material shall conform to the tensile properties specified. The sampling and specimen preparation are as covered in Specification B829. Tensile properties for material specified as small- diameter and light-wall tube (converter sizes) shall be as prescribed. Hydrostatic or Nondestructive Electric Test—Each pipe or tube shall be subjected to either the hydrostatic test or the nondestructive electric test. The type of test to be used shall be at the option of the manufacturer, unless otherwise specified in the purchase order.



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 mm (4D), min,%

UNS N08825	hot-finished annealed		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
UNS N06845	cold-finished, annealed		100 (690)	40 (276)		30
^A Hot-forming quality is furnished to chemical requirements and surface inspection only. No mechanical properties are required.
Dimensions and Permissible Variations
Diameter and Wall Thickness—The permissible varia-tions in the outside diameter and wall thickness shall conform to the permissible variations prescribed Specification B829. Permissible variations for material specified as small- diameter and light-wall tube (converter size) shall conform to the permissible variations prescribed.

Mechanical Properties^A of Small-Diameter and Light-Wall Tubing (Converter Sizes)
Condition	Tensile Strength, ksi (MPa)		Yield Strength (0.2 % offset) min, ksi (MPa)		Elongation in 2 in. or 50 mm, min, %
Annealed^BC	85-115 (586-793)		35 (241)		30
Half-hard^D	105 (724) min		75 (517)		15
Full-hard^E	125 (862) min		100 (689)		5
^A Not applicable to outside diameters under 1/s in. (3.2 mm) and wall thickness under 0.015 in. (0.381 mm). ^B This condition is sometimes designated as “No. 1 Temper.” ^C The minimum tensile strength value applies only to tubing in straight lengths. ^D This condition is sometimes designated as “No. 2 Temper.” ^EThis condition is sometimes designated as “No. 3 Temper.”




Permissible Variations for Small-Diameter and Light-Wall Tube (Converter Sizes)^ABCDEFG
Specified Outside Diameter, in. (mm)	Outside Diameter, in. (mm)		Inside Diameter, in. (mm)		Wall Thickness, %
	+	–	+	–	+		–
Under 3/32 (2.4)	0.002 (0.05)	0	0	0.002 (0.05)	10		10
3/32 to 3/16 (2.4 to 4.8), excl	0.003 (0.08)	0	0	0.003 (0.08)	10		10
3/16 to 1/2 (4.8 to 12.7), excl	0.004 (0.10)	0	0	0.004 (0.10)	10		10
1/2 to 1 1/4 (12.7 to 31.8), incl	0.005 (0.13)	0	0	0.005 (0.13)	10		10
^A Ovality, Normal Wall Tube—As-Drawn (No. 2 and 3) Tempers—Ovality will be held within the outside diameter tolerances shown in the table. Annealed (No. 1) Temper—Ovality will be held within 2 % of the theoretical average outside diameter. ^BOvality, Light Wall Tube—As-Drawn (No. 2 and 3) Tempers—Up to but not including 1Vi in. (31.8 mm) in outside diameter, ovality will be held within 2 % of the theoretical average outside diameter. Annealed (No. 1) Temper—Ovality will be held within 3 % of the theoretical average outside diameter. ^C Wall Tolerances, Light Wall Tube—The plus and minus wall tolerance shown in the table shall apply down to and including 0.005 in. (0.13 mm) in wall thickness. For wall thicknesses less than 0.005 in. (0.13 mm), the tolerance shall be ±0.0005 in. (0.013 mm). ^DRandom Lengths: Where nominal random lengths on tubing V8 in. (3.2 mm) and larger in outside diameter are specified, a length tolerance of ±3V2 ft (1.06 m) applies to the nominal length. This is a total spread of 7 ft (2.10 m). Random lengths in sizes V8 in. (3.2 mm) and larger in outside diameter shall be subject to a length range of 5 to 24 ft (1.50 to 7.30 m). Long random lengths are subject to a range of 15 to 22 ft (4.57 to 6.70 m). Random lengths in sizes up to, but not including, 18 in. (3.2 mm) in outside diameter and fragile light-wall tubes over this outside diameter are subject to the length range of 1 to 15 ft (0.30 to 4.57 m). ^E Cut Lengths—Tolerances on cut lengths. ^F Straightness—Round tubing is subject to a straightness tolerance of one part in 600 [equivalent to a depth of arc of 0.030 in. (0.76 mm) in any 3 ft (0.91 m) on length]. ^G When specified, the tolerance spreads of this table may be applied as desired. However, when not specified, the tolerances in this table will apply. It should be noted that inside diameter tolerances are based upon the outside diameter range.
















Tolerances on Cut Lengths of Light-Wall Tube
Length, ft (m)	Tube Size, in. (mm)		Permissible Variations, in. (mm)
			Over		Under
Under 1 (0.30)	up to 1.250 (31.8), incl		1/32 (0.8)		0(0)
1 to 4 (0.30 to 1.22), incl	up to 1.250 (31.8), incl		1/16 (1.6)		0 (0)
Over 4 to 10 (1.22 to 3.0), incl	up to 1.250 (31.8), incl		3/32 (2.4)		0 (0)
Over 10 (3.0)	up to 1.250 (31.8), incl		3/16 (4.8)		0 (0)

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