ASTM-B394 Historical Revision Information
Niobium & Niobium Alloy Seamless & Welded Tubes, Standard Specification For

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Standard Specification for Niobium and Niobium Alloy Seamless and Welded Tubes


1.1 This specification covers wrought niobium and niobium alloy seamless and welded tubes as follows:

Note-Committee B-10 has adopted "niobium" as the designation for Element No. 41, formerly named "columbium."

1.1.1 R04200-Type 1 -Reactor grade unalloyed niobium,

1.1.2 R04210-Type 2 -Commercial grade unalloyed niobium,

1.1.3 R04251-Type 3 -Reactor grade niobium alloy containing 1% zirconium, and

1.1.4 R04261-Type 4 -Commercial grade niobium alloy containing 1% zirconium.

1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 The following precautionary caveat pertains only to the test methods portion 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


niobium; niobium alloy; seamless tubes; seamless and welded tubes; welded tubes; ICS Number Code 23.040.15 (Non-ferrous metal pipes)

To find similar documents by ASTM Volume:

02.04 (Nonferrous Metals--Nickel, Cobalt, Lead, Tin, Zinc, Cadmium, Precious, Reactive, Refractory Metals and Alloys; Materials for Thermostats, Electrical Heating and Resistance Contacts, and Connectors)

To find similar documents by classification:

23.040.15 (Non-ferrous metal pipes Non-ferrous metal pipes and tubes for specific use, see 77.150)

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Document Number


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Publication Date

Aug. 29, 1986

Document Type


Page Count

5 pages

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