This specification covers welded tubes made from nickel and nickel-cobalt alloys with UNS Nos. N10001, N10242, N10665, N12160, N10629, N10624, N10675, N10276, N06455, N06007, N06975, N08320, N06985, N06002, N06022, N06030, N06035, N06058, N06059, N06200, N06210, N08031, R30556, N06230, N06686, and R20033. These alloys are intended for heat exchanger and condenser tubes and tubes for general corrosive service for heat-resisting applications. The tubes shall be made from flat-rolled alloy by an automatic welding process with no addition of filler metal, and shall be furnished in the solution annealed and descaled conditions. Materials shall adhere to mechanical (tensile strength, yield strength, and elongation), chemical composition, flattening test, flange test, hydrostatic test, pneumatic test, and eddy current test requirements.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification covers welded tubes made from the nickel and nickel-cobalt alloys (UNS N10001, UNS N10242, UNS N10665, UNS N12160, UNS N10629, UNS N10624, UNS N10675, UNS N10276, UNS N06455, UNS N06007, UNS N06975, UNS N08320, UNS N06985, UNS N06002, UNS N06022, UNS N06030, UNS N06035, UNS N06058, UNS N06059, UNS N06200, UNS N10362, UNS N06210, UNS N08031, UNS R30556, UNS N06230, UNS N06686, and UNS R20033) listed in Table 1 intended for heat exchanger and condenser tubes and tubes for general corrosive service for heat-resisting applications.

1.2 This specification covers tube ¹/₈ to 3½ in. (3.2 to 88.9 mm) in outside diameter and 0.015 to 0.148 in. (0.41 to 3.7 mm) inclusive, in wall thickness.

1.3 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.

1.4 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.

TABLE 1 Chemical Requirements

Composition Limits, %
	Ni	Cr	Mo	Fe	W	C	Si max	Co	Mn	V	P max	S max	Ti	Cu	Cb (Nb) +Ta	Al	Zr	La	N	B	Cb (Nb)	Ta	Ni+ Mo	Mg
Ni-Mo Alloys
N10001	remainder	1.0 max	26.0- 30.0	4.0-6.0	...	0.05 max	1.0	2.5 max	1.0 max	0.2- 0.4	0.04	0.03	...	...	...
N10665	remainder	1.0 max	26.0- 30.0	2.0 max	...	0.02 max	0.10	1.0 max	1.0 max	...	0.04	0.03	...	...	...
N10675	65.0 min	1.0- 3.0	27.0- 32.0	1.0-3.0	3.0 max	0.01 max	0.10	3.0 max	3.0 max	0.20 max	0.030	0.010	0.20 max	0.20 max	...	0.50 max	0.10 max	...	...	...	0.20 max	0.20 max	94.0- 98.0
N10629	remainder	0.5- 1.5	26.0- 30.0	1.0-6.0	...	0.01 max	0.05	2.5 max	1.5 max	...	0.04	0.01	...	0.5 max	...	0.1- 0.5	...	...	...	...	...	...	...
N10624	remainder	6.0- 10.0	21.0- 25.0	5.0-8.0	...	0.01 max	0.10	1.0 max	1.0 max	...	0.025	0.01	...	0.5 max	...	...	...	...	...	...	...	...	...
Ni-Mo-Cr-Fe Alloy
N10242	remainder	7.0- 9.0	24.0- 26.0	2.0 max		0.03 max	0.80	1.00 max	0.80 max		0.030	0.015		0.50 max		0.50 max				0.006 max
Low C Ni-Cr-Mo Alloys
N10276	remainder	14.5- 16.5	15.0- 17.0	4.0-7.0	3.0- 4.5	0.010 max	0.08	2.5 max	1.0 max	0.35 max	0.04	0.03	...	...	...
N06022	remainder	20.0- 22.5	12.5- 14.5	2.0-6.0	2.5- 3.5	0.015 max	0.08	2.5 max	0.5 max	0.35 max	0.02	0.02	...	...	...
N06035	remainder	32.25- 34.25	7.60- 9.00	2.00 max	0.60 max	0.050 max	0.60	1.00 max	0.50 max	0.20 max	0.030	0.015	...	0.30 max	...	0.40 max
N06455	remainder	14.0- 18.0	14.0- 17.0	3.0 max	...	0.015 max	0.08	2.0 max	1.0 max	...	0.04	0.03	0.70 max	...	...
Ni-Cr-Fe-Mo-Cu Alloys
N06007	remainder	21.0- 23.5	5.5- 7.5	18.0-21.0	1.0 max	0.05 max	1.0	2.5 max	1.0- 2.0	...	0.04	0.03	...	1.5- 2.5	1.75- 2.5
N06975	47.0-52.0	23.0- 26.0	5.0- 7.0	remainder	...	0.03 max	1.0	...	1.0 max	...	0.03	0.03	0.70- 1.50	0.70- 1.20	...
N06985	remainder	21.0- 23.5	6.0- 8.0	18.0-21.0	1.5 max	0.015 max	1.0 max	5.0 max	1.0 max	...	0.04	0.03	...	1.5- 2.5	0.50 max
N06030	remainder	28.0- 31.5	4.0-6.0	13.0-17.0	1.5- 4.0	0.03 max	0.8	5.0 max	1.5 max	...	0.04	0.02	...	1.0- 2.4	0.30- 1.50
Ni-Fe-Cr-Mo Alloys
N08320	25.0-27.0	21.0- 23.0	4.0- 6.0	remainder	...	0.05 max	1.0	...	2.5 max	...	0.04	0.03	4xC min	...	...
Ni-Cr-Mo-Fe Alloy
N06002	remainder	20.5- 23.0	8.0- 10.0	17.0-20.0	0.20- 1.0	0.05- 0.15	1.0	0.5-2.5	1.0 max	...	0.04	0.03	...	...	...
Ni-Fe-Cr-Co Alloy
R30556	19.0-22.5	21.0- 23.0	2.5- 4.0	remainder	2.0- 3.5	0.05- 0.15	0.20- 0.80	16.0- 21.0	0.50- 2.00	...	0.04	0.015	...	...	...	0.10- 0.50	0.001- 0.10	0.005- 0.10	0.10- 0.30	0.02 max	0.30 max	0.3- 1.25
Ni-Cr-W-Mo Alloy																		B751 Specification for General Requirements for Nickel and Nickel Alloy Welded Tube E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS) Keywords UNS N10001; UNS N10242; UNS N10665; UNS N12160; UNS N10629; UNS N10624; UNS N10675; UNS N10276; UNS N06455; UNS N06007; UNS N06975; UNS N08320; UNS N06985; UNS N06002; UNS N06022; UNS N06030; UNS N06035; UNS N06058; UNS N06059; UNS N06200; UNS N10362; UNS N06210; UNS N08031; UNS N06230; UNS N06686; UNS R30556; UNS R20033; welded tube ; Condenser and heat exchanger systems--nickel alloy; Hastelloy alloy; Nickel alloy tube--specifications; Nickel-chromium-iron-molybdenum-copper alloys--specifications; Nickel-chromium-molybdenum-iron alloys--specifications; Nickel-cobalt alloy; Nickel-iron-chromium-molybdenum alloys--specifications; Nickel-molybdenum alloys--specifications; UNS N06002 (Ni-Cr alloy, Hastelloy X); UNS N06007 (Ni-Cr alloy, Hastelloy G); UNS N06022 (Ni-Cr-Mo alloy, Hastelloy C-22); UNS N06030 (wrought Ni-Cr-Fe-Mo-Cu alloy, Hastelloy G-30); UNS N06059 (low carbon Ni-Cr-Mo alloy, Alloy 59); UNS N06200 (Ni-Cr-Mo-Cu alloy, Hastelloy C-2000); UNS N06210 (Ni-Cr-Mo-Ta alloy, Hastelloy C-2000); UNS N06230 (Ni-Cr-W-Mo alloy, Alloy No. 230); UNS N06455 (Ni-Cr alloy, Hastelloy C-4); UNS N06686 (Ni-Cr-Mo-W alloy, Inconel 686); UNS N06975 (Ni-Cr alloy, Hastelloy G-2); UNS N06985 (Ni-Cr alloy ERNiCrMo-9, Hastelloy G-3); UNS N08031 (Ni-Fe-Cr-Mo-Cu, Alloy No. 31); UNS N08320 (Ni-Fe-Cr alloy, Haynes No. 20 Mod); UNS N10001 (Ni-Mo alloy, Hastelloy B); UNS N10276 (Ni-Mo alloy, Hastelloy C276); UNS N10624 (low carbon Ni-Mo-Cr-Fe alloy, B-10); UNS N10629 (Ni-Mo alloy, B-4); UNS N10665 (Ni-Mo alloy, Hastelloy B-2); UNS N10675 (Ni-Mo-Cr-Fe alloy, Hastelloy B-3); UNS N12160 (Ni-Co-Cr-Si alloy, HR-160); UNS R20033 (Cr-Ni-Fe-Mo austenitic stainless steel, Alloy 33); UNS R30556 (Fe-Cr-Ni-Co alloy, HS 556); Welded Ni/Ni alloy tube--specifications ICS Code ICS Number Code 23.040.15 (Non-ferrous metal pipes) DOI: 10.1520/B0626-10E01 ASTM International is a member of CrossRef. ASTM B626 (Nonferrous Metal Standards and Nonferrous Alloy Standards) Citing ASTM Standards [Back to Top]