Active Standard ASTM B834 | Developed by Subcommittee: B02.07
Book of Standards Volume: 02.04
Historical (view previous versions of standard)
This specification tackles standards for pressure consolidated powder metallurgy iron-nickel-chromium-molybdenum and nickel-chromium-molybdenum-columbium pipe flanges, fittings, valves, and parts intended for general corrosion or heat-resisting service. Compacts shall be manufactured by placing a single powder blend into a can, evacuating the can, and sealing it. The can material shall then be selected to ensure that it has no deleterious effect on the final product. The specimen shall be heated and placed under sufficient pressure for a sufficient period of time to ensure that the final consolidated part is fully dense. The powder shall be produced by vacuum melting followed by gas atomization. The heats shall be thoroughly mixed to ensure homogeneity when powder from more than one heat is used to make a blend. The material shall have the chemical compositions of carbon, manganese, silicon, phosphorus, sulfur, chromium, molybdenum, nickel, iron, cobalt, columbium, aluminum, titanium, nitrogen, and copper. Hydrostatic test shall be conducted and the specimen must show no leaks. The density test shall be performed using sample suspended from a scale and weighed in air and water using Archimede?s principle. Check Analysis shall be wholly the responsibility of the purchaser. The parts of the specimen shall be uniform in quality and condition, and shall be free from injurious imperfections.
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.
1.1 This specification covers pressure consolidated powder metallurgy iron-nickel-chromium-molybdenum (UNS N08367) and nickel-chromium-molybdenumcolumbium (Nb) (UNS N06625) pipe flanges, fittings, valves, and parts intended for general corrosion or heat-resisting service.
1.1.1 UNS N06625 products are furnished in two grades of different heat-treated conditions:
184.108.40.206 Grade 1 (annealed)—Material is normally employed in service temperatures up to 1100°F (593°C).
220.127.116.11 Grade 2 (solution annealed)—Material is normally employed in service temperatures above 1100°F (593°C) when resistance to creep and rupture is required.
1.2 UNS N08367 products are furnished in the solution annealed condition.
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 The following safety hazards caveat pertains only to test methods portions, Sections 7.3 and 13, 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 to determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E8 Test Methods for Tension Testing of Metallic Materials
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
G28 Test Methods for Detecting Susceptibility to Intergranular Corrosion in Wrought, Nickel-Rich, Chromium-Bearing Alloys
G48 Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution
Manufacturers Standardization Society of the Valve and Fittings Industry StandardSP-25 Standard Marking System for Valves, Fittings, Flanges, and Unions
ASME/ANSI StandardASME/ANSI B16.5 Pipe Flanges and Flanged Fittings