Burrs, End Mills, Drills, Reamers, Routers, Aerospace Industries
Burrs, End Mills, Drills, Reamers, Routers, Aerospace Industries
Material Safety Data Sheet

CHEMICAL NAME:

Cemented Carbide Product with Cobalt binder:

TRADE NAME AND SYNONYMS:

All Menlo Carbide Grades

CHEMICAL FAMILY:

Refractory Metal Carbide

MOLECULAR WEIGHT:

N/A

Physical Data

APPEARANCE AND ODOR:

Dark Gray Metal/No Odor

BOILING POINT:

N/A

VAPOR PRESSURE (mm Hg):

N/A

VAPOR DENSITY (Air=1):

N/A

SOLUBILITY IN WATER:

Insoluble

SPECIFIC GRAVITY (H2O=1)

11.0 TO 15.5

PERCENT VOLATILE BY VOLUME:

0

EVAPORATION RATE:

N/A

HOW BEST MONITORED:

Air Sample

Hazardous Ingredients


PERCENT
BY WEIGHT
OSHA PEL
ACGIH
TLV

Tungsten Carbide
(limits for Tungsten Dust)

67-97%*
----
5 mg/m3

Cobalt
(limits for Tungsten Dust)

3-25%*
0.1 mg/m3
0.1 mg/m3

Chromium Carbide
0.0-50%*
5 mg/m3
5 mg/m3

(limits for chromium (3+) Dust)

0.0-1.0%*
1 mg/m3
0.5 mg/m3

Chromium (3+)

0.0-1.5%*
1 mg/m3
0.5 mg/m3

*Depends on grade specifications

Health Hazard Data

ROUTES OF EXPOSURE:

Grinding cemented tungsten carbide product will produce dust of potentially hazardous ingredients which can be inhaled, swallowed, or come in contact with the skin or eyes.


EFFECTS OF OVEREXPOSURE

Inhalation -

Dust from grinding can cause irritation of the nose and throat. It also has the potential for causing transient or permanent respiratory disease including occupational asthma and interstitial fibrosis in a small percentage of exposed individuals. It is reported that cobalt dust is the most probable cause of such respiratory diseases. Symptoms include productive cough, wheezing, shortness of breath, chest tightness, and weight loss. Interstitial fibrosis (lung scarring) can lead to permanent disability or death.

Skin Contact -

Can cause irritation or an allergic skin rash due to cobalt sensitization.

Eye Contact -

Can cause irritation.

Ingestion -

Reports outside the industry suggest that ingestion of significant amounts of cobalt has the potential for causing blood, heart, and other organ problems.


EMERGENCY AND FIRST AIR PROCEDURES:
Applicable for dusts or mists

Inhalation -

If symptoms of pulmonary involvement develop (coughing, wheezing, shortness of breath, etc.), remove from exposure and seek medical attention.

Skin Contact -

If irritation or rash occurs, thoroughly wash affected area with soap and water and isolate from exposure. If irritation or rash persists, seek medical attention.

Eye Contact -

If irritation occurs, flush with copious amounts of water. If irritation persists, seek medical attention.

Ingestion -

If substantial quantities are swallowed dilute with a large amount of water, induce vomiting and seek medical attention.


CARCINOGENIC ASSESSMENT
 (NTP Annual Report, IARC Monographs, Other):

None of the components of this material have been identified as known or suspected carcinogens by NTP, IARC, or OSHA.

Fire and Explosion Hazard Data

FLASH POINT: N/A

FLAMMABLE LIMITS: N/A

TEST METHOD USED: ---

LEL: ---

UEL: ---


Hard Cemented Tungsten Carbide Product is not a fire hazard. Dusts generated in grinding operations may ignite if allowed to accumulate and subjected to an ignition source.


EXTINGUISHING MEDIA:

For powder fires, smother with dry sand, dry dolomite, ABC type fire extinguisher, or flood with water.
SPECIAL FIRE FIGHTING PROCEDURES:

For powder fire confined to a small area, use a respirator approved for toxic dusts and fumes. For a large fire, fire fighters should use self-contained breathing apparatus.
UNUSUAL FIRE AND EXPLOSION HAZARDS:

Dust may present a fire or explosion hazard under rare favoring conditions of particle size, dispersion and strong ignition source. However, this is not expected to be a problem under normal handling conditions.

Reactivity Data

STABILITY:

Unstable


Stable

X

INCOMPATIBILITY:

Contact of dust with strong oxiders may cause fire or explosions.


HAZARDOUS POLYMERIZATION:

May Occur


Will Not Occur

X

CONDITIONS TO AVOID:

N/A


MATERIALS TO AVOID:

Strong Acids


Spill or Leak Procedures

STEPS TO BE TAKEN IN CASE MATERIAL IS RELEASED OR SPILLED:

Dispose of in accordance with appropriate government regulations. May be sold for scrap or reclaim.
WASTE DISPOSAL METHOD:

Ventilate area of spill. Clean up using methods which avoid dust generation such as vacuum (with appropriate filter to prevent airborne dust levels which exceed the PEL or TLB), wet dust mop or wet clean-up. If airborne dust is generated, use an appropriate NIOSH approved respirator.

Special Protection Information

RESPIRATORY PROTECTION:

Use an appropriate NIOSH approved respirator if airborne dust concentrations exceed the appropriate PEL or TLV. All appropriate requirements set forth in 29 CFR 1910.135 should be met

CHEMICAL NAME: Cemented Tungsten Carbide Product with Cobalt Binder.


VENTILATION:

Use local exhaust ventilation which is adequate to limit personal exposure to airborne dust levels which do not exceed the PEL or TLV. If such equipment is not available, use respirators as specified above.
PROTECTIVE GLOVES:

Protective gloves or barrier cream are recommended when contact with dust or mist is likely. Prior to applying the barrier cream or use of the protective gloves wash thoroughly.
EYE PROTECTION:

Safety glasses with side shields or goggles are recommended.
OTHER PROTECTIVE EQUIPMENT:
N/A

PRECAUTION TO BE TAKEN IN HANDLING AND STORAGE:

Maintain good housekeeping procedures to prevent dust accumulation during grinding. Avoid dust inhalation and direct skin contact with dust.
OTHER PRECAUTIONS:

Clean up using methods which avoid dust generation such as vacuum (with appropriate filter to prevent airborne dust levels which exceed the PEL OR TLV), wet dust mop or wet clean-up. If airborne dust is generated, use an appropriate NIOSH approve respirator.

Wash hands thoroughly after handling, before eating or smoking. Wash exposed skin at the end of work shift. Do not shake clothing, rags, or other items to remove dust. Dust should be removed by washing or vacuuming (with appropriate filters) the clothing, rags, or other items.

Periodic medical examinations are recommended for individuals regularly exposed to dust or mist.

In case of questions please call:

MARCH 22, 1999

MENLO TOOL COMPANY, INC.
JOHN E. FALK - EXECUTIVE VICE PRESIDENT
810-756-6010

SUPERSEDES:
NOVEMBER 20, 1985

Although Menlo has attempted to provide current and accurate information herein, Menlo makes no representations regarding the accuracy or completeness of the information and assumes no liability for any loss, damage, injury of any kind which may result from or arise out of the use of or reliance on the information by any person.