Material safety data sheets, operating manuals for machines, and any warnings of the companies that made the machines, tools, and chemicals used in the shop should all be considered in the final assessment. Suri me scholar1, production engineering department, pec university of technology, chandigarh, india associate professor2, production engineering department, pec university of technology, chandigarh, india. Control of welding hazards includes avoiding eye injury, using respiratory protection, ventilating the. Depending on workpiece material and the condition of the tool, unit powerrequirements in machining range between 0. Just a few drill tap machines they outsource a lot of their production, beyond their in house machining. It was created by taking the requirements of the metals standards nfpa 480, standard for the storage, handling, and processing of. Safe machining of magnesium parts by cutting and burnishing. The heavy envelopes enclose data for a given class of material.
Metal dusts may migrate into soil and groundwater and be ingested by wildlife. A quick visit to their shop, and there are no heroic fire suppression efforts. In machining of magnesium alloys, waterbase cutting fluids can be effectively used to eliminate the buildup formation and minimize the possibility of chip ignition. Magnesium alloys have been increasingly used in automotive and aerospace components and in portable microelectronic devices due to their ultralightness and high specific strength. Exposure to magnesium oxide can cause metal fume fever. This is a flulike illness with symptoms of metallic taste in the mouth, headache, fever and chills, aches, chest tightness and cough. The oil functions primarily as a coolant, reducing the risk of fire, which is common to magnesium machining. This article focuses on the factors that affect the machining of magnesium. Magnaloycouplingcompany technicalproductinformation couplings thepossibilityoffirewhenmachiningmagnesiumisalwaysarealconcern. Magnesium may react with moisture or acids to evolve hydrogen gas, which is a highly dangerous fire or explosion hazard. A research consortium has developed a novel way to extract magnesium particles out of the machine by vacuuming them through a hollow tool and spindle during machining. May emit fumes of magnesium oxide under fire conditions.
Magnesium machining practices and precautions magnaloy. Magnesium ribbon and fine magnesium shavings can be ignited at air temperatures of about 950f and very finely divided powder has been ignited at air temperatures below 900f. Elsevier surface and coatings technology 9495 1997 610416 the influence of tool coating s in mach ining of magnesium abstract magnesium is the lightest metal used in construction and therefore offers the greatest potential for weight reduction. Information about where and how cadmium is used, stored, and released at the worksite, including processes or operations that involve potential cadmium exposure, especially above the pel. Jul 01, 2014 this file may not be suitable for users of assistive technology. Potential health effects if dusts or fumes are generated by processing eyes. The osha hazardous waste operations and emergency response standard 29 cfr 1910. Explanation of the health hazards associated with cadmium exposure see appendix a of the cadmium standard at 29 cfr 1910. The element can be found in abundance in the hydrosphere and in mineral salts such as dolomite and magnesium carbonate.
The right to know hazardous substance fact sheets are not intended to be copied and sold for commercial purposes. Check with the shop instructor or supervisor before machining unusual or unique materials such as composites, plastics, titanium, magnesium, or beryllium copper. It is possible to achieve a high cutting speed for magnesium alloy, there are however, concerns that with an increase in cutting speed, there may be serious flank buildup fbu due to. Schilling fromthe departmentforresearch in industrial medicinemedicalresearch council, thelondonhospital received forpublication, june9, 1947 introduction magnesiumalloys were first used in. It is possible to achieve a high cutting speed for magnesium alloy, however, there. Vanvalkenburg chemical name formula dot dot identification no. Safety and health topics metalworking fluids safety. Magnesium is classified as an alkaline earth metal and has 2 hydration shells. However, when high speeds are used, there is the danger of fire, particularly when fine chips are being produced. Chemical element, metallic, symbol mg, situated in group iia in the periodic table, atomic number.
Thermal decomposition can lead to release of irritating gases and vapors. Zinc is not listed as a carcinogen by osha, ntp, iarc, acgih or the eu see toxicological information, section 11. In machining of magnesium alloys, waterbase cutting fluids can be effectively used to. Magnesium has very good machining abilities like sawing, punching, drilling, milling, turning compared to other metals. Machining copper beryllium is a ductile metal that machines easily. Origin and development of nfpa 484 nfpa 484, standard for combustible metals, metal powders, and metal dusts, 2002 edition, is a comprehensive combustiblemetal fire safety document. However, individual components of the material have been found to be toxic to the environment. Safety practices for machining copper beryllium alloys. Machining magnesium is risky business, as the chips and dust generated are flammable. Special precautions to be taken in processing, handling and storage. The microconstituents present in alumi num alloys have important effects on ma chining characteristics. Safety data sheet according to 29cfr19101200 and ghs rev.
The first part of this presentation provides a brief educational overview of the electrical discharge machining process edm second, a detailed analysis of when,why and where edm can provide a huge benefit in the engineering, design and implementation of the overall tool manufacturing process. Always have dry sand, flux such as m310, or a class d fire extinguisher available when. Spills and emergencies if employees are required to cleanup spills, they must be properly trained and equipped. To avoid the generation of excess heat and reduce the risk of fire tools should never be allowed to dwell on the surface of the machined part. Machining copper beryllium is a ductile metal that machines easily, generally producing large chips and turnings. Machining is an important method used to process magnesium alloys. Show this safety data sheet to the doctor in attendance. Introduction to magnesium alloys asm international. You may make both very fine magnesium particles and hot water machining with water based coolant. One of the most significant limitations to mill use is the ability to properly and securely clamp or. Powder or dust from grinding or other operations can present an explosion hazard. Processes that generate large particles are usually performed in an open shop environment with no special ventilation. Dec 06, 2004 developing a safer way to machine magnesium machining magnesium is risky business, as the chips and dust generated are flammable. The specific cutting power is low and the surface is excellent and the chips are short.
Since 1968, specmaster has been an industry leader in machining a variety of complex parts from magnesium. Material identification company reissue date identification number thyssenkrupp materials na, inc. Magnesium mg alloys, the lightest of structural materials on the earth, possess great potential to be used in important sectors such as automobiles, aerospace, and biomedical applications. Pdf the science, technology, and applications of magnesium. Hazards of machining magnesium practical machinist. Hazards of machining magnesium 1 no waterbased coolant.
It was assumedthat each worker breathed 10 cubic metres ofair per day. General advice show this safety data sheet to the doctor in attendance. Its relative density is 1,74 and its density 1740 kgm 3 0. Because of their complex metallurgical structure, their machining characteristics are superior to those of pure aluminum. Safety practices for machining copper beryllium alloys drilling, boring, milling, turning, tapping, reaming, sawing, etc.
A new customer has a few jobs to quote, machining magnesium parts. Methods for prevention of ignition during machining of magnesium alloys article pdf available in key engineering materials 447448. Magnesium oxide 9484 1 mullite 2938 1 silicon dioxide 7631869 1 zinc powder 7440666 1 the ingredients may be released as general dust from the product by operations such as overheating, burning, machining, abrading, or riveting. Magnesium is the fastest machining metal and it has a high thermal conductivity.
Water reacts with magnesium to form hydrogen which is flammable and potentially explosive when mixed with air. Magnesium is known for a long time as the lighter structural metal in. The possibility of fire when machining magnesium is always a real concern. Another risk when machining magnesium dry is its high reactivity. Problems and hazards when machining magnesium and its alloys. When heated in air to a temperature near its melting point, magnesium alloys ignite and burn with a white flame. For over 15 years weve specialized in complex surface machining and are capable of reproducing even the most challenging geometries. Pdf methods for prevention of ignition during machining. The influence of tool coatings in machining of magnesium. The influence of tool coating s in mach ining of magnesium abstract magnesium is the lightest metal used in construction and therefore offers the greatest potential for weight reduction. Cadmium for pdf home occupational safety and health.
A39559 the majority of magnesium is stored in the bones 50%, while the remainder is stored in muscle, soft tissue, red blood cells and serum. Magnesium usually does not react with water, but oil based coolants would probably be better, because magnesium can react with very hot water, ie steam, and very small magnesium powder is more reactive than big magnesium chips. Protecting workers from the hazards of abrasive blasting materials abrasive blasting uses compressed air or water to direct a high velocity stream of an abrasive material to clean an object or surface, remove burrs, apply a texture, or prepare a surface for the application of paint or other type of coating. Machining of magnesium and magnesium alloys machining. Magnesium is important for many biochemical processes and is therefore quite common in humans. Protecting workers from the hazards of abrasive blasting. No crashes or other events that could cause heat or sparks allowed. Use of water on molten magnesium will produce hydrogen gas and may cause an explosion.
Material safety data sheet magnesium chloride, acs 3 section 7 handling and storage handling. Pdf magnesium alloys have been increasingly used in automotive and. Traditionally a low viscosity oil has been the recommended cutting fluid for magnesium machining. May react slowly with water to liberate hydrogen, a flammable gas. If you use assistive technology such as a screen reader and need a version of this document in a. While machining magnesium, keep a fire extinguisher suitable for magnesium in the immediate area for instant use. Some use mineral oil, i cut dry, conservatively in speed. Autoignition temperature is for magnesium turnings or ribbon. Water soluble coolant is not recommended, as magnesium and water are highly reactive. Machjning of aluminum and alumjnum alloys aluminum alloys can be ma chined rapidly and economically. Fluorosis and magnesium foundries theconcentration was 60 mg. Zinc metal has relatively low bioavailability and poses no immediate ecological risks. Machining, magnesium, hydrogen abstract in machining of. Methods for prevention of ignition during machining of.
Machining of magnesium firstly, the meaning of machinability is the ability of material to machine or the ease of machining a metal. This machinability quantifies the machining performance, and may be defined for a specific application by various criteria, such as tool life, surface fi nish, chip evacuation, material removal rate and machine. Standard for the storage, handling and processing of magnesium solids and powders if a digital product is offered and you select pdf or digital access, you are purchasing a license to access nfpa information electronically. Magnesium metal 7439954 99 100% all concentrations are percent by weight unless ingredient is a gas. These materials may create secondary hazards including fire and toxic fumes. Nuclear criticality 100 kg reduction of natural uranium hazards. Dust, turnings, or fine pieces may ignite easily when presented with an ignition. Welding welding is a method for joining pieces of metal.
Machining magnesium and magnesium alloys pages 820830 general information. Check with all local codes before machining magnesium. The information contained in this safety facts applies only to the subject referenced in the title. Machining of magnesium and magnesium alloys asm digital library. Eye contact rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Pieces 3 mm thick are difficult to ignite but possible when heated to near the melting point. Magnesium is machined in lowvolume production on small, manually operated machine tools and on large, specially built, completely automated transfer machines operating at high production rates. Training is necessary for each employee who is required to use ppe. The automotive industry in particular has an upcoming interest in the use of magnesium alloys. However, if proper pre cautions are taken, this risk can be reduced greatly. Common dietary sources of magnesium include nuts cashews, peanuts, almonds, beans, bananas, apples, carrots, broccoli, and leafy greens.
Also includes requirements for metals not listed above, that exhibit combustible metal characteristics capable of combustion or explosion. Pdf methods for prevention of ignition during machining of. Since magnesium will ignite and burn fiercely when heated to a point near its melting temperature, certain precautions should be taken during working of it. Our skilled machinists have years of experience and an extensive knowledge of various machining strategies to produce your magnesium components. Metal fuel fabrication safety and hazards presentation. It will keep burning because the majority of the material that makes it look so cool while it burns isyes, you guessed it, magnesium. Breathing magnesium oxide can irritate the eyes and nose.
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