Z 910

SECTION 2: Hazards identification

HAZARDOUS DECOMPOSITION PRODUCTS: Welding fumes and gases cannot be classified simply. The composition and quantity of both are dependent upon the metal being welded, the process, procedure and electrodes used. Other conditions which also influence the composition and quantity of the fumes and gases to which workers may be exposed include: coatings on the metal being welded (such as paint, plating or galvanizing); the number of welders and the volume of the worker area, the quality and amount of ventilation, the position of the welder’s head with respect to the fume plume, as well as the presence of contaminants in the atmosphere (such as chlorinated hydrocarbon vapors from cleaning and degreasing activities). When the electrode is consumed, the fume and gas decomposition products generated are different in percent and form from the ingredients listed in Section ll. Decomposition products of normal operation include those originating from the volatilization, reaction, or oxidation of the materials shown in Section ll, plus those from the base metal and coating, etc, as noted above. Reasonably expected fume constituents of this product would include: Primarily iron oxide and fluorides; secondarily complex oxides of manganese, potassium, silicon and sodium. Maximum fume exposure guideline for this product (based on manganese content) is 4.0 milligrams per cubic meter. Gaseous reaction products may include carbon monoxide and carbon dioxide. Ozone and nitrogen oxides may be formed by the radiation from the arc. Determine the composition and quantity of fumes and gases to which workers are exposed by taking an air sample from inside the welder’s helmet if worn or in the worker’s breathing zone. Improve ventilation if exposures are not below limits. See ANSI/AWS F1.1.F1.2.F1.3.F1.4 and F1.5 available from the AMERICAN Welding Society, 550 N.W. Lejeune Road, Miami, FL 33126. 1 3+8. COMPOSITION INFORMATION ON INGREDIENTS & EXPOSURE CONTROL This section covers the materials from which this product is manufactured. The fumes and gases produced during welding with normal use of this product are covered by Section 5 see it for industrial hygiene information. CAS Number shown is representative for the ingredients listed. All ingredients listed may not be present in all sizes. The term ‘hazardous’ in Hazardous Materials’ should be interpreted as a term required and defined in the Hazards Communication Standard and does not necessarily imply the existence of any hazard. INGREDIENTS: CAS No. WT. TLV PEL % mg/m3 Iron 7439-89-6 <10 5(respirable fraction) 10(fume) Cellulose 9004-34-6 <5 10 5(respirable fraction) 15(dust) Titanium dioxide 13463-67-7 <5 10 15(dust) Silicate binder 1344-09-8 <5 none Molybdenum 7439-98-7 <2 3(respirable fraction) none 10(inhalable fraction) none 0.5(respirable fraction) 5(soluble) Manganese 7439-96-5 1.0 0.2(fume) 5 ceiling Nickel 7440-02-0 <1 0.1 1 Carbon steel core wire 7439-89-6 50 5(respirable fraction) 10(fume)