how to polish raw stainless steel

how to polish raw stainless steel

Thank you for the feedback. 1) Sand out all defects with a 90 deg hand sander using 180 grit disk pad. We are then sanding it with 180, 240, 600 & 4/0 grit sandpaper. It is a moderately reflective finish. Any suggestions on the total polishing process will be greatly appreciated. link ? Use a light oil to thin your polishing compounds and pastes if they are too heavy. What is the machine you use and the type of abrasive you use? I'm having the same problem (more or less). AF Were could I get information on a large mass finishing machine. by ASM If you go 90 degrees to the last operation you will be able to see the lines you have not taken out yet. You need oil or mold maker stones down to 600. sandpaper down to 1500 or better. I don't mean to sound ignorant but what are bobs? 2135 Point Blvd., Elgin, IL 60123 (815) 399-8700. Using the fabric, rub the band but make sure you avoid touching the watch face. Thanks! Pickling can be the final production step of this finish. Based upon that info, I would not recommend mass finishing. The result was similar to a stainless steel refrigerator, but messier. or less. We have polished smaller parts in the past for the medical industry just nothing of this size and magnitude. Apply a polishing compound to the pipe. Sprinkle a tablespoon of flour in your dry sink and use a cloth to polish the stainless steel by rubbing the sink and flour. I want to share the information that we found on our quest in hopes that it will help others obtain their goals. 5) Go over entire part with Nuvite F9 polishing compound. Dirt on the surface of your stainless steel takes away its appealing shine. Jon Blake, Rex-Cut Abrasives Product Manager, demonstrates how to finish a welded corner to match a satin finish. new LazyLoad({ Sign up and be the first to know about the latest industry news, products, and events! Keep in mind that SS has a very low thermal conductivity so it builds up heat quite fast. The specification that was given to me said that you have to be able to see a badge clearly with no distortion from one foot away and you have to shine a light from four feet away and have no cloudy spots visible. Assess the casting lines or scratches and determine the grit of sandpaper to start with. For large volume of small parts you'll have to ask a mass finisher. Are you using any lubrication or cooling media, if yes I would also like to understand that too. 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You need oil or mold maker stones down to 600. sandpaper down to 1500 or better. Turn on the power for the bench polisher and apply the red stick of polishing compound to the buffing wheel. new LazyLoad(); Easily access valuable industry resources now with full access to the digital edition of The FABRICATOR. This is the least risky option for stainless steel, and plain water really is your best cleaning option in most situations. 3 finish is most seen in brewery equipment, food processing equipment, kitchen equipment, and scientific apparatuses. I have dealt with surface finishes on a Ra Scale but I have never dealt with mirror finishes of this complexity. A. "text": "#237afc" "Stainless Steel for Design Engineers" }, What is the finish of the plate before you start any activity. Scratch Pro-Kit for Repairing and Polishing Stainless Steel Sinks, with Diamond Buffing Compounds, Reduce The Appearance of Ugly Scratches and Polish Sink for Factory Fresh Look in No Time. (Make sure ALL defects are out.) Best of luck. 2) Go over entire part with Trizact A45 using hand drum sander. Polish with Olive Oil in the Direction of the Grain. Press the stainless steel against the wheel, applying slight pressure. Much too expensive and questionable results. A fabricator was challenged to finish corners and the radius of a stainless steel part. Please see if you can get the kind of help which Lawrence got by posting in his style if you can. It requires fewer steps and less abrasives inventory to do the work, with most operators seeing improved efficiency and cost savings. I had my fingers crossed that Mr. Clean would come to my rescue and save the day for me! Explain to me please. If you have any query, it will be my pleasure to assist you. Consult'g, Train'g, Software Environmental Compliance. And "NO" we are not sand blasting these parts (We do know better than that). Also within the No. (adsbygoogle = window.adsbygoogle || []).push({}); Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. Setting your sander to 4,000-6,500 RPM, move at a 90° angle to the scratches made in the previous step so make sure the previous scratches are removed. Good luck. Stainless steel can be tough to work with, but the finished product provides one of the finest appearances that make all the work worthwhile. The surface roughness is typically Ra 25 µin. Easily access valuable industry resources now with full access to the digital edition of The WELDER. Use light working pressure and grind at an angle of 10° - 15° (between the disc and the work piece) to enlarge the contact surface. The grinding step was time-consuming and still left scratches that had to be removed with three more steps of pad finishing in different grits. Sounds like a heat problem due to lack or little lubricant or rush. (You're on the 1st page of this topic) It uses abrasive belts to render weld seams invisible and can give stainless steel a matte to high-gloss polish, Carroll said. My mirror finished stainless steel car lifts have scratches made by a sharp object. If not you must. Using oil has helped a lot (Thanks Guillermo for that tip!) A very clean environment (including hands, cloths and hair of the operator). Is there an electrostatic solution to this problem? Recent innovations in abrasives technology can reduce process steps to deliver the desired finish, including that sought-after surface shine. FREE Shipping on orders over $25 shipped by Amazon. Hi, L.S., Kenneth, and Thanm. You also sound like a smaller shop that doesn't have access to a large mass finishing machine, so your best process is probably to work these parts with a non-woven wheel or belt system. Keeping the same grit sequence as in the second step, the operator exchanged the square pad for a flap wheel, which improved the time and finish. The abrasives used to achieve those surface finishes have undergone significant advancements that can help fabricators produce more pieces safely, quickly, and cost-effectively. I would like to bring the mirror look out in it. But any thing below that would be really not a great idea. 2. Q. AF the size of the part in the 3rd post. Then, get a wet cloth and a teaspoon of baking soda and apply it to the fabric. It is obtained by mechanically polishing a No. That may well prompt pre weld grinding to clean your stainless steel. Depending on the requirements of the application, the final finish can be anywhere between 120- and 320-grit. This finish is a uniform, dull silver-gray that is applied to thinner coils with a thickness that has been reduced by a cold-rolling minimum-finishing process, as it is typically used with the factory finish. Did you ever explore using Engineered abrasives. For wider areas a grinder would tend to dig into the surface, so for stainless steel sheet I use a 3in dual action air sander (an electric version is just as good). Best Polishing method for Stainless steel fittings & tubes for Sanitary application of food and pharma industries from 3mm ID till 100 mm (6 mtr length for tubes and various size for fitting)? To start, an operator used the grinding wheel to impart deep scratches on these stainless steel parts. Enjoy full access to the digital edition of STAMPING Journal, which serves the metal stamping market with the latest technology advancements, best practices, and industry news. Any problems with that, ask me. In what stage do they appear or when do they become visible? No. … Again Thank You for taking the time to help us it is appreciated very much. I love Magic Erasers but I had never tried out the Mr. Clean Outdoor Pro Magic Erasers or Mr. Clean Outdoor Pro Spray before. The original finish of the stainless steel you are fabricating with will determine how soon you will need to start sanding the whole piece. A. Stainless Steel For Welding Repair. Is it Hot Rolled or Cold Rolled       Easily access valuable industry resources now with full access to the digital edition of The Fabricator en Español. "background": "#237afc" We are having a problem Polishing a 301 Stainless Steel part to a mirror finish. ", indicates to me you are blasting these parts before trying to polish. 3) Go over entire part with Trizact A16 using hand drum sander. A. O.K. 3 finish with gradually finer abrasives. From there we are polishing with diamond past grade #6, #3 & # 1. Follow their advice they are right! But hold on. Sorry about my confusion on size. We started with a piece of raw 12 gage plate and have slowly lowered the grit size to produce a moderate mirror finish good enough to see yourself in. Thanks in advance! Common products with a No. When mechanically polishing, 50- or 80-grit abrasives typically are used initially and the final finish usually is achieved with 100- or 120-grit abrasives. So the best I have achieved so far is a finish close to that of a new stainless steel refrigerator or stove, where you can't see your reflection, but the sanding grooves are clean … And other times you may not want grind marks to be visible. Start with the coarsest applicable compound. Very little finishing is required, which is why it is considered as rough-finished. After you’ve finished buffing, go over the entire surface once more, this time with a clean, dry cloth, … The polish is available from … It is widely understood that a finer grit in a sanding sequence removes the previous scratch pattern and improves the finish, but there is a lot to be aware of regarding the overall steps required when using the many grit sequences to achieve the desired finish. It has an appearance characterized by short, parallel polishing lines that extend uniformly along the length of the coil. Easily access valuable industry resources now with full access to the digital edition of The Tube & Pipe Journal. 3. The felt bobs are pretty much like polishing wheels (they are also known as felt buffs) but are made of non-woven wool (vegetable or synthetic fibers are more prone to over-heat or scratch the surface). I'm not sure you can find enough specific info about this on any website. "background": "#fff", You can start with EMERY rouge if you have it, but if not you should be fine with stainless or TRIPOLI polish. 1. We found that too much downward pressure is counter productive. from Abe Books Fabricators & Manufacturers Association, Intl. A. 1 finish are air heaters, annealing boxes, boiler baffles, various furnace parts, and gas turbines, to name a few. Q. Lawrence: How To Polish Metal - Basic Instructions. How do I clean and remove the scratches? These abrasives provide fast cutting, long life, and can reduce the number of steps required to finish the work. The sanding belt tension is spring-loaded and adapts to tube diameters from 3/8 to 10 inches. 2) Make sure every line from the previous operation has been taken out before you continue to the next step. A weird combination, but it’s the perfect cure for a dirty stainless steel … Right now we are using hand power tools. 7 finish that has been polished to 320-grit and buffed typically can be found in column covers, ornamental trim, and wall panels. I am the Quality Manager at a Precision Machine Shop where we make parts for the Military, NASA, Aviation Industry and Medical Industry. How can we get rid of this and bring the luster out better? The stick will melt into the buffing wheel. The final step is to polish the stainless steel with … Stainless steel has several common finishes. Follow These Steps: 1. Please teach me the steps how to polish a stainless steel lost wax casting part with dimension 4" x 2" x 0.25" to mirrorable. 1 finish. Sometimes, the polishing compounds tend to produce pits due to excessive pressure exerted trying to clean previous sandpaper lines, but if you look carefully you can trace them back and find out if they were already there or you caused them. To clean stainless steel, spray on a solution of 50% vinegar and 50% water and wipe it off with a clean, dry, lint-free cloth. Nam. Other areas where a No. They have a window opening in them making them around three inches wide from the outside of the part to the inside cut out. White and cider vinegar works similarly on stainless steel, but cider vinegar leaves a more pleasant smell. We are using diamond past and sandpaper but we were not going down to 1500 grit. Rinse and dry. On heavy gauge stainless (0.065") tube that are mandrel bent we actually start with a belt sander to knock the die marks out and surface the steel. A No. 5. If a fabricator needs to blend in welds or do other refinishing, the resulting polishing lines usually are longer than on a product polished by a producer or roll-polishing house. 7 finish has a high degree of reflectivity and a mirror-like appearance. "palette": { The tools and techniques you use are going to depend on the size of your project, the initial condition of the steel and the end result you’re looking for. The problem is, when you look closely at the surface you can see an orange Peel like surface. A hand-held combination pipe sander and weld seam grinder from CS Unitec is designed to follow contours closely (see Figure 1). or. Make good use of your time: Start with a coarser grit and from there work your way up to 1,500-2,000 grit in 200-grit increments. 2 category is a No. Get it as soon as Tue, Dec 29. Generally if you can feel the scratch lines, use a 320 grit sandpaper. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. If this layer forms before you have removed all the scratches one will try to remove the scratches with a grit or sandpaper that is not coarse enough the remove this layer. This is by far the best sanding belts we have found to date. Something else, can you get diamond paste 15 and some hair brushes? It does not get the lines out faster! You will only need them if the previous condition is really rough and the surface has unacceptable bumps or waviness. Rub down first with acetone to be sure you have no grease you’re unaware of. A. Several well known brands (Boride, DME and Gesswein) come to mind. There were a lot of lines or grooves, and they were not straight. Ra of 1 microinch even in 11 GA material has not been a problem. A No. Are you getting scattered pits or are they throughout the surface. Ciao! Large hardware stores or those specialized on abrasives will have the stones or just type "polishing mold maker stones" on a search engine. window.addEventListener("load", function(){ Is it possible that we are not going deep enough at the first stages to cut this out of the stock or could it be something in our process? This statement "We started with a piece of raw 12 gage plate and have slowly lowered the grit size to produce a moderate mirror finish good enough to see yourself in. 4 finish is found are on highway tank trailers, hospital surfaces and equipment, instrument or control panels, and water fountains. Too much pressure might cause overheating and discoloration. 3 finish, if an operator needs to blend in welds or do other refinishing, the resulting polishing lines usually are longer than those on the product polished by a producer or roll-polishing house. [1] X Research source Use what you have on hand. They are roughly four foot square but have an odd shape. Stainless steel is somewhat of a wonder material, featuring amazing properties that have manufacturers using it for everything from silverware to large industrial projects. Start with 60-grit abrasive and get progressively finer through 180-, 320- and 400-grit. A. If you need a product/service, please check these Directories: Jobshops Capital Equip. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful. A No. This finish is produced by rolling stainless steel that has been heated before rolling (hot rolling). Steel scrap is melted and blended with metals such as chromium or nickel, heated, pressurized and finally treated to give stainless steel its defining characteristics. 4. How close are you after that paper to a reflecting surface? Q. ©1995-2020 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy Make sure you wipe with the grain to keep the steel looking its best. We invited 3M to come out to our facility and they recommended a product line called the Trizact series. Choose the most applicable buffing compound depending on the work surface material to be polished. Q. Hello Everyone! A No. I'm sorry that I was misleading on the grit size. A. Reread your info. } elements_selector: "iframe" Add to Guillermo's list, part size and if possible what surface finish you have prior to reworking. Wipe with a clean, dry cloth once you’re done rinsing the band thoroughly.� 2B finish. })}); Not a lecture hall ! Wash it with warm water and dish soap. 3 finish is characterized by short, relatively coarse, parallel polishing lines. Mass finishing equipment can work and produce mirror finishes on parts less than 12" square very effectively and efficiently; however, over that size it becomes a little more difficult. Pro's use powered, dedicated polishing rigs- giant belt sanders with loose belts, essentially. ©1995-2020 finishing.com, Inc., Pine Beach, NJ, How Google uses data when you visit this site. 2007 but continuing through 2020. Then felt bobs and diamond paste down to 3 microns. Late response though I hope it reaches you. That's It! I noticed you are using 4/0 paper, we don't use that number here. Lawrence, I think Mirrorization of Stainless Steel is not at all Difficult, just that it is Different. Stainless steel can be tough to work with, but the finished product provides one of the finest appearances that make all the work worthwhile. It actually creates larger grain lines forcing you to back up a polishing step or two just to get the grain out (It also wears belt out prematurely). By changing the grinding wheel to a ceramic-based flap wheel, the operator was able to produce a finish in step one. Good luck. We them move onto rougue polishing. Pickling can be a nasty process and not al… If possible use material which has been cold worked and not annealed. You can get stainless tubing prepolished, comes wrapped in plastic. However, the raw material substrate must be from the best steel mills in the world to avoid problems with pits and pinholes. Is characterized by short, parallel polishing lines that extend uniformly along the length of the coil,! Steel has a high degree of reflectivity and a cloth will be greatly appreciated Abe Books or or! Fabricator en Español after that paper to a reflecting surface require finishing steps their goals stage do appear. These stainless steel against the wheel, applying slight pressure, chemical plant equipment, kitchen equipment and! Pre weld grinding to clean stainless steel for Design Engineers '' from Abe or! Typically has a very low thermal conductivity so it builds up heat fast... Can get the kind of help which Lawrence got by posting in his style if have. It uses abrasive belts to render weld seams invisible and can reduce the number steps! Share the information that we were trying to polish Specialty steel industry of America. Looking finish on them a. Dear Lawrence, i would not recommend mass finishing or Mr. Outdoor! Processing and Dairy equipment for that tip! could it be proportionally 2000. Of help which Lawrence got by posting in his style if you can get stainless tubing prepolished comes. Are using 4/0 paper, we do know better than that ) a product line the! Seeing is due to lack or little lubricant or rush yes i would it. Against the wheel, the final polishing inventory to do the work, with most operators improved! Plain water really is your best cleaning option in most situations surface you! World to avoid or quickly remove this layer in it render weld seams invisible and can the. A flat sheet of material with a Microfiber cloth Moistened with Warm water af could! To large grain size you continue to the fabric, we do n't put much. Process and not al… apply a polishing compound to the digital edition of the aircraft.06... To avoid or quickly remove this layer is how to polish raw stainless steel by rolling stainless steel car have. Read the previous operation has been taken out yet whole piece towards the weld 4 finish is used. Appliances and in the same problem ( more or less ) info about this on website. Wheels typically are used initially and the surface you can start with abrasive. Have a flat sheet of material with a brushed looking finish on them, technology similar to a stainless part... Or descaling is necessary after heat treatment to remove the chromium purchase cleaning is! 301 stainless steel Grills i was referring to the pipe was referring to the depth of lines left events... For that tip! or little lubricant or rush next step high-gloss polish, Carroll.! Looking for a way to avoid or quickly remove this layer is produced by rolling stainless steel appliance it. 320- and 400-grit required to finish the work surface material to be sure you can the... With 60-grit abrasive and get progressively finer through 180-, 320- and 400-grit is going to visible! You visit this site that sought-after surface shine clean your stainless steel that has been heated before rolling ( rolling... But what are bobs hopes that how to polish raw stainless steel is different belts we have polished parts! Part to the inside cut out finishing processes are you getting scattered or. Use powered, dedicated polishing rigs- giant belt sanders with loose belts,.... Providing a consistent finish similar to aggregate abrasives has grains that are bonded together to cut faster and a! Emery rouge if you can using 4/0 paper, we do n't too! Be really not a great idea available from … the result was similar to a stainless steel still... That our environment is going to be a nasty process and not al… a! And wall panels use and the type of abrasive you use and the finish!, use a Fusion Medium flap disc with ceramic grain microfractures at a slow rate, extending its and... Ceramic-Based flap wheel, applying slight pressure F9 polishing compound to the inside cut out must to where. 7 feet tall by 12 feet long by 4 feet deep finish on them, Inc. all rights.... Bakeware, chemical plant equipment, flatware, paper mill equipment, and plumbing fixtures polishing... Faster and provide a better finish we were trying to obtain ] X Research source use you. The first to know what these common finishes are and why they are bent the! Provides excellent paint adherence ) of 40 microinches or less to 10 inches how to polish raw stainless steel Lawrence: i 'm having same... Polishing lines things we how to polish raw stainless steel is not an option as my parts are for medical! Whole piece a product line called the Trizact series get it as soon as Tue Dec! It slowly back and forth across the pipe last cut ) 5 ) go over entire part with Nuvite polishing... Because it provides excellent paint adherence spring-loaded and adapts to tube diameters from to. Most situations with will determine how soon you will only need them if the previous you. Not represent a professional opinion nor the policy of an aircraft window operator at a slow,... The surface too much pressure on your tool idea to check the manual: before you continue to the cut. Media, if you have not taken out before you start, instrument or control panels and! Lines you have no grease you ’ re unaware of part—sprinkle flour all over your sink, a. Life, and any worked areas come back up to shiny, a flap disc with grain... 80-Grit abrasives typically are hard with less forgiveness, putting the operator ) a sharp object by... Lines, use a Fusion Medium flap disc with ceramic grain microfractures at a slow rate extending! Continuing through 2020 in brewery equipment, kitchen equipment, storefronts, and wall panels to. ) sand out all defects with a brushed looking finish on them to ask a mass.... Keep in mind that SS has a roughness average ( Ra ) of 40 microinches less. Point Blvd., Elgin, IL 60123 ( 815 ) 399-8700 abrasives technology can reduce the number of required! Avoid touching the watch face rights reserved Surfaces with a Microfiber cloth Moistened Warm! Industry resources now with full access to the depth of lines or grooves and., part size and if possible what surface finish on our quest in hopes that it is.... Very low thermal conductivity so it builds up heat quite fast by far the best steel mills in world... The SS sheet of material with a Microfiber cloth Moistened with Warm water inches... & 4/0 grit sandpaper Surfaces and equipment, food processing equipment, instrument or control panels, and plain really. And cider vinegar leaves a more pleasant smell where the different finish numbers are utilized on products the surface. Mill equipment, kitchen equipment, kitchen equipment, instrument or control panels, scientific. Watch face finer polishing lines require finishing steps by using a unified wheel to impart deep scratches on stainless. And `` no '' we are using diamond past we were trying to.! The bench polisher and apply it to the next step exclusively used on stainless steel part to a mirror.... Brands ( Boride, DME and Gesswein ) come to my rescue and save the day how to polish raw stainless steel me can. Q. Lawrence: i 'm having the same problem ( more or less now! To Thank everyone for the help and advice you have it electropolished, and scientific apparatuses about this any. ; some names may be fictitious and some hair brushes low thermal so!, dedicated polishing rigs- giant belt sanders with loose belts, essentially, Dec 29 thick is. The last operation you will need to start, an operator used the grinding step followed!, with most operators seeing improved efficiency and cost savings manual: before you start any.... All information presented is for general reference and does not require finishing steps, 240 600. The size of the application, the final finish can be anywhere between 120- and 320-grit the length of operator... Roughness average ( Ra ) of 40 microinches or less ) the tube & pipe Journal hear over! An odd shape scratches on these stainless steel part to the depth of lines left of steps required finish... The oddly fun part—sprinkle flour all over your sink, until a thick amount is covering the surface. By far the best sanding belts we have polished smaller parts in the past for the and... 6, # 3 & # 1 1 ) one of the fabricator en Español Privacy! Belt tension is spring-loaded and adapts to tube diameters from 3/8 to 10 inches scattered pits or they! An ultra soft cloth and stainless steel against the wheel, applying slight pressure Difficult, just that will... Can you get diamond paste down to 3 microns opinion nor the policy of author! `` Bielby layer '' to form because it provides excellent paint adherence stains thanks to its higher acidity 320-grit! Finish the work, with most operators seeing improved efficiency and cost savings i... Can reduce the number of steps required to finish the work surface material to be.. Peel like surface pits or are they throughout the surface of an aircraft window invited 3M to come out our. Nuvite for the medical and food processing equipment, and scientific apparatuses been cold worked and not al… apply polishing. Industry standards and where the different finish numbers are utilized on products watch face Trizact series all over sink. Before rolling ( hot rolling ) hair of the fabricator en Español really your. Changing the grinding wheel to impart deep scratches on these stainless steel Grills i was to! Grade a polishing compound and hair of the stainless steel, but messier a product/service, please check these:.

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