Abstract

American National Standards Institute Inc.

This specification establishes the requirements for four classes of machinable, high-density tungsten base metal produced by consolidating metal powder mixtures, the composition of which is mainly tungsten. This material specification may be used for bare parts or for parts that may be coated with other materials for protection against corrosion and abrasion; intended for uses such as weights or counter-balances in static or dynamic balancing, high-speed rotating inertia members, radiation shielding, hypervelocity impact, and vibration-damping applications. The chemical; physical properties, such as microstructure and machinability; mechanical properties, such as tensile strength, yield strength, elongation, and hardness; and composition requirements, such as density; are detailed.

Scope

1.1 This specification covers the requirements for four classes of machinable, high-density tungsten base metal produced by consolidating metal powder mixtures, the composition of which is mainly tungsten. This material specification may be used for bare parts or for parts that may be coated with other materials for protection against corrosion and abrasion.

1.2 This specification describes physical, mechanical, and microstructural testing of a material lot based on the use of test coupons, not actual parts. Sintered properties typically vary both with part size and sampling location within a given part. Results obtained from coupon testing may therefore differ from the properties of a specific location in a larger part.

1.3 Intended Use—Parts made from this material are intended for uses such as weights or counter-balances in static or dynamic balancing, high-speed rotating inertia members, radiation shielding, hypervelocity impact, and vibration-damping applications. In selecting the appropriate alloy for a given application, it is important to note that as the tungsten content of the alloy is increased, stiffness, radiation attenuation, and density increase with an accompanying decrease in attainable ductility.

1.4 Special Applications—For particular applications, properties or requirements other than those specified in Sections 5, 6, and 7 of this specification may be important. These alloys may contain elements which make them weakly ferromagnetic. Where freedom from magnetic response is required, this should be specified in the purchase order. Class 4 is not available in a non-magnetic grade. For purposes of this specification, non-magnetic material is defined as material having a maximum magnetic permeability of 1.05 (see Test Method A342). Also for special applications involving large sections, methods for determining internal quality, such as mechanical testing of specimens excised from these larger sections or suitable nondestructive tests may be applied. If such part property data are required, an additional part-specific test program shall be specified in the purchase order.

1.5 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.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Go to ASTM B777 at ASTM.org

Add your thoughts about the standard.

1375 - Demolition Materials (549) 1377 - Cartridge and Propellant Actuated Devices and Components (524) 4720 - Hose and Flexible Tubing (552) 4730 - Hose, Pipe, Tube, Lubrication, and Railing Fittings (1823) 5120 - Hand Tools, Nonedged, Nonpowered (1124) 5305 - Screws (781) 5306 - Bolts (996) 5310 - Nuts and Washers (864) 5330 - Packing and Gasket Materials (583) 5340 - Hardware, Commercial (953) 5905 - Resistor (753) 5910 - Capacitors (783) 5930 - Switches (1012) 5935 - Connectors, Electrical (4357) 5940 - Lugs, Terminals, and Terminal Strips (564) 5945 - Relays and Solenoids (733) 5950 - Coils and Transformers (856) 5960 - Electron Tubes and Associated Hardware (1630) 5961 - Semiconductor Devices and Associated Hardware (707) 6145 - Wire and Cable, Electrical (1629) 6240 - Electric Lamps (662) 6505 - Drugs and Biologicals (1343) 6515 - Medical and Surgical Instruments, Equipment, and Supplies (1907) 6520 - Dental Instruments, Equipment, and Supplies (790) 6530 - Hospital Furniture, Equipment, Utensils, and Supplies (745) 6610 - Flight Instruments (540) 6625 - Electrical and Electronic Properties Measuring and Testing Instruments (1241) 6640 - Laboratory Equipment and Supplies (1187) 6810 - Chemicals (1114) 8010 - Paints, Dopes, Varnishes, and Related Products (2046) 8030 - Preservative and Sealing Compounds (554) 8140 - Ammunition and Nuclear Ordnance Boxes, Packages and Special Containers (797) 8305 - Textile Fabrics (910) 8415 - Clothing, Special Purpose (660) 8455 - Badges and Insignia (3093) 8915 - Fruits and Vegetables (531) 9330 - Plastics Fabricated Materials (759) FACR (1647) ISDA (1776) ISDD (786) ISDF (1827) ISDN (581) MISC (1045) PACK (539) SESS (581)
Aerospace Material (225) Aircraft Air Conditioning, Heating, and Pressurizing Equipment (334) Aircraft Hydraulic, Vacuum, and De-icing System Components (263) Ammunition, 75mm through 125mm (192) Ammunition, over 30mm up to 75mm (208) Ammunition, through 30mm (349) Analytical Chemistry (180) Bombs (192) Building (414) Bulk Explosives (261) Cartridge and Propellant Actuated Devices and Components (524) Consumer Product Evaluation (267) Copper (192) Demolition Materials (549) Electrical and Magnetic Conductor (162) Electronics (153) Environmental Toxicology (187) Fire Control Computing Sights and Devices (338) Fire Control Radar Equipment, except Airborne (197) Fuzes and Primers (454) Geotechnical Engineering (217) GUN (640) Land Mines (276) Medical Device and Implant (427) Military Chemical Agents (156) Miscellaneous Aircraft Accessories and Components (231) Miscellaneous Fire Control Equipment (216) Nondestructive Testing (246) Nonferrous Metal and Nonferrous Alloy (367) Nuclear Technology (274) Optical Sighting and Ranging Equipment (451) Paint and Related Coating (456) Parachutes; Aerial Pick Up, Delivery, Recovery Systems; and Cargo Tie Down Equipment (324) Petroleum (378) Plastic Pipe (248) Pyrotechnics (175) Road and Paving (177) Rockets, Rocket Ammunition and Rocket Components (368) Rubber (166) Security System Pedestrian and Walkway Safety (157) Specialized Test and Handling Equipment, Nuclear Ordnance (150) Sports and Recreation (316) Steel (908) Torpedos and Components, Inert (258) (621)