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Tungsten Heavy Alloy

Grade Charts

Tungsten Heavy Alloy Material Safety Data Sheet

Section 1. Chemical Identification

Synonyms: Tungsten heavy alloy, heavy metal tungsten alloy, high density tungsten alloy, tungsten alloy containing nickel and iron, tungsten alloy containing nickel and copper, tungsten alloy containing nickel, iron and cobalt.

CAS #:
7440-33-7 (tungsten), 7440-02-0 (nickel), 7440-50-8 (copper), 7440-48-4 (cobalt).

Section 2. Composition/Information on Ingredients

Chemical Family: Refractory metal alloy.
Chemical Formula: W+Ni+Fe, W+Ni+Cu, W+Ni+Fe+Co, W+Ni+Fe+Cu+Co

5 insoluble;
1 soluble
5 insoluble;
1 soluble
10 insoluble;
3 soluble
1 insoluble;
1 soluble
1 insoluble;
0.1 soluble


0.1 fume; 1 dusts & mists
0.2 fume; 1 dusts & mists

Section 3. Physical and Chemical Properties

Appearance: Gray metal solid
Odor: None
Melting Point: N/A
Boiling Point: N/A
Vapor Pressure: N/A
% Volatiles by Weight: 0
Specific Gravity (H20 = 1): 16.7 – 18.7
Water Solubility: Insoluble

Section 4. Fire and Explosion Hazard Data

Flash Point: N/A
Auto Ignition Temperature: N/A
Flammable Limits: Upper – N/A; Lower – N/A
Extinguishing Media: Class D fire extinguishing (dry powder). Tungsten rod, wire, and fabricated products are not a fire hazard. Fine dust generated during the machining or grinding of tungsten alloys may ignite if allowed to accumulate and are subjected to an ignition source. Cover burning material with an inert powder such as dry sand or limestone to exclude oxygen.
Unusual Fire and Explosion Hazards: Dust may present a fire or explosion hazard under favoring conditions of particle size, dispersion, and strong ignition source. Fire and explosion, however, are not expected to be a problem under normal handling conditions.

Special Fire Fighting Procedures: Use a respirator approved for toxic dust and fumes or wear a self-contained breathing apparatus.

Section 5. Health Hazard Data

Primary Routes of Entry: Inhalation, ingestion, skin or eye contact (for dusts, mist, powder, and fume).
Effects of overexposure: No specific data, testing, or information has been found for the chemical compounds that comprise this product.
Carcinogenic Assessment: Cobalt (IARC 2B) has been identified as a possible carcinogen to humans and is moderately toxic by ingestion. Nickel (IARC 2B, NTP2) has been identified as a substance or group of substances which may reasonably be anticipated to be carcinogens and is poisonous by ingestion, intratracheal, subcutaneous, and intravenous routes.
Skin Exposure: May cause irritation. If irritation or rash occurs, remove contaminated clothing, wash affected area thoroughly with soap and water and isolate from further exposure. If rash persists, seek medical attention.
Eye Exposure: May cause irritation. If irritation occurs, flush with clean, lukewarm water for at least 15 minutes. If irritation persists, seek medical attention.
Inhalation: May cause irritation of the respiratory tract. If irritation occurs, move the exposed person to fresh air and, if necessary, perform artificial respiration. If symptoms persist, seek medical attention.
Ingestion: Large overdoses may cause nervous system disturbances and diarrhea. If ingested, give large amounts of water and induce vomiting. If symptoms persist, seek medical attention. Never attempt to induce vomiting by giving anything by mouth to an unconscious person.

Section 6. Spill and Leak Procedures

Cleanup Procedures: If material is released or spilled, ventilate the area of the spill. Clean the spill up in a way which avoids the generation of dust. Methods include wet mopping or vacuuming with a vacuum that is equipped with filters adequate to prevent airborne dust levels that exceed the PEL or TLV. Dispose of any wastes in accordance with local, state, and federal regulations.

Section 7. Exposure Control/Personal Protection

Respiratory Protection: Use an appropriate NIOSH approved respirator if airborne dust concentrations exceed the PEL or TLV. See 29CFR1910.134 for requirements which must be met.
Ventilation: Use local exhaust ventilation which is adequate to limit personal exposure to airborne dusts to levels which do not exceed the appropriate PEL or TLV. If such equipment is not available, use a respirator as specified above.
Skin protection: Protective gloves or barrier creams are recommended if contact with dusts or mists is likely. Wash thoroughly before using protective gloves or applying a barrier cream.
Eye Protection: The use of safety glasses with side shield or goggles is recommended.

Section 8. Handling and Storage

Tungsten alloys are generally safe materials to handle and use under all commonly encountered conditions. Special precautions are required only in situations where the material is present as a fine powder or where operations such as machining or grinding create dusts or soluble byproducts. Prevent the accumulation of dusts through good housekeeping practices. Use cleanup methods such as wet mopping or vacuuming that avoid the generation of dusts. If dusts are generated, avoid inhalation and direct skin contact, use an appropriate NIOSH approved respirator, and wash hands thoroughly before eating or smoking. Do not shake clothing or other items to remove dust. Do not ingest. Periodic medical examinations are recommended for individuals regularly exposed to dusts or mists.

Section 9. Stability and Reactivity

Stability: Tungsten alloys are stable.
Incompatibility: Contact of dusts with strong oxidizers may cause fire or explosion. Avoid contact with strong acids. Extremely fine powders may be pyrophoric under certain conditions.
Hazardous Decomposition Products: None.
Hazardous Polymerization: Will not occur.

Section 10. Disposal Methods

These materials must be disposed of in accordance with all applicable local, state, and federal regulations. Materials may be sold as scrap for reclamation as an alternative to disposal as wastes.

Section 11. Regulatory Information

SARA Title III: This product may be subject to the reporting requirements of Section 313 of SARA Title III if the de minimus concentrations of the material exceed 1.0 for cobalt, 1.0 for copper, 0.1 for nickel. See 40 CFR 372 for reporting requirements.
DOT: There are no special DOT regulations pertaining to this material if shipped in solid form.
TSCA: This material is registered under the regulation of the Toxic Substance Control Act.
RCRA Hazardous Waste Number: Not listed.

Section 12. Other Information

Date of Issue: 15 September 2007.
Contact: Comments or questions concerning this document should be directed to Federal Carbide Company, One Eagle Ridge Road, Tyrone, PA 16686; phone 814-684-7600.
Disclaimer: The information contained in this document is believed to be accurate, but does not purport to be to all inclusive, should be used only as a guide, and is furnished without warranty, express or implied. Federal Carbide Company assumes no legal responsibility for the use of or reliance upon this information.


Federal Carbide Company • One Eagle Ridge Road • Tyrone, Pennsylvania 16686 USA
814-684-7600 / 800-631-3640 Fax: 814-684-9400 • inquiry@federalcarbide.comwww.federalcarbide.com