Hightemperature hardness and wear resistance of stellite. X2yz for two different pnumber metals welded to each other in this numbering system. The following 19 answers to frequently asked questions may help you select. With shopfloor, all your qc documentation is available from within one platform. Weld procedure software can eliminate p number research time. Stellite is a trademarked name of deloro stellite company supplying stellite alloys like stellite3, stellite 6, stellite 12 and stellite 21. The software includes all the needed welding procedure forms such pqr, pqr test results, wps, wqtr, and ndt forms. Stellite is a trade name for a whole class of alloys, rather than a single alloy, some compositions are intended to be economic to machine, others less so, for example some of the welding rods are intended for hard facing digger buckets. Ni alloy 625 weld overlays onto pump, valve or sealing surfaces exposed to brackish water, sea water or sour gas service.
Jun 06, 2016 how to write a welding procedure specification iso 156141 one of the most important documents in regards to welding is the wps welding procedure specification and many people working with wps look at them like they are just an issue, or something that only the engineers and quality control technicians have to worry about, but is it a hard thing to create andor look at. Among stellite alloys stellite 21 has unique properties such as creep. The material itself has been around since the 1900s and was originally seen as a substitute for traditional metal cutlery which suffered from general wear and tear and was also prone to staining. Weldspec is a welding procedure software for engineers and managers who track and manage welding procedures to asme ix, en 288 en 156141. Deposited by plasma transferred arc welding ptaw process on a 316l stainless. It is a hosted solution that is cost effective, easy to use, and keeps your files organized. If this is your first visit, be sure to check out the faq by clicking the link above. Users are cautioned to confirm by qualification testing. This is a better and more fool proof approach even for buttressed inconel 625 layer welding done before application of stellite 6 or stellite 21. We have laser cladded stellite 6 on steel recently and the hardness was observed to be approx. Stellite 3 is superior and this improved resistance increases as loads are increased or speeds are increased to 10 times to 25 times that of stellite alloy 6 or 12. If you dont get a good answer here, try one of the welding forums or call a local welding shop that works in stellite.
I weld and machine alot of stellite 21 and its alot nicer with the right toolinginserts. Deloro stellite company also supplies other products like casting, machinery, welding, coating, knives and many others. Mostly chrome and cobalt, often with tungsten, sometimes with a fair amount of nickel or molybdenum. Wear characteristic of stellite 6 alloy hardfacing layer. Welding procedure software free downloads shareware central. Delamination failures of stellite hardfacing in power plants. These numbers 1 have been assigned to base metals and filler metals alike, grouping materials to reduce the number of welding procedures and welder performance qualification tests needed to qualify a wide range of materials base metals and filler metals. Hardfacing a standard term for a wearresistant weld overlay is commonly used for seat and guide surfaces on valve trim of all styles. Effect of temperature on friction and galling of laser processed. Bonding stellite 6 to alloy steel metengr materials 21 aug 08 17. The effort is made in this study to apply the stellite6 weld overlay using plasma transferred arc welding ptaw on inconel825 plate with less than 5%wt feiron on the weld material. Results regarding the solutiontreated structure, precipitation by isothermal transformation.
Machining stellite weld possible practical machinist. Mar 08, 2005 this robot is hardfacing an agricultural tool. Effect of heat treatment upon the microstructure and hardness. Our procedure is preheat to 400f maintain interpass 400750 sometimes welding keeps it hot but sometimes reheating or wrapping in kaowool insulation is needed. The stellite 6 hardfacing prepared with the same laser process parameters is also analyzed and tested. Stellite 6 welding rods hai stellite 6 rod is cobalt base rod. The welding procedure approval record wpar is a record of this weld. Stellite21 or stellite6 or ultimet uns r31233 weld overlay where a. Universal wps, pqr and pqrd multiprocess forms supporting multiple codes, including asme ix, iso 15614, aws d1. Stellite 6 welds pretty clean unless it gets oxidized and then the puddle gets sluggish.
The trademark owners of stellite claim that stellite 6 is the most widely used of their range of stellite alloys, offering a proven industry standard for generalpurpose wear resistance, and high mechanical and chemical perfromance in hostile environments. We invite you to contact a member of our sales team to discuss your needs and get more information. Pdf an experimental study of welding parameters for. Cspec weldoffice wps cspec welding procedure software. At first glance, hardfacing can be confusing and troublesome. Pdf stellite alloy mixture hardfacing via laser cladding for control. Welding procedure specification wps creation and management is simple, fast and accurate with automatic code checking and links to code related software modules.
It can be applied using a variety of welding processes including manual metal arc. Stellite alloys chemical composition, mechanical properties. Can duplex stainless steels be hardfaced without adversely affecting the base material properties. Plasma transferred arc welding of stellite 6 alloy on. Weld cladding is typically between 2 and about 20 mm thick. Stellite alloy chemistries all c w m c hardness, oys r o hrc stellite 6 29 4. Introduction of cobalt based stellite 21 welding rod. Kennametal stellite manufactures consumable weld overlay materials as cast rod, cored wire, electrodes, and powder, with a special focus on nickel and cobalt base materials. Stellite 6 is a cobase wear resistant alloy containing 1% c, 27% cr, 4. For sigma, sigma select, sigma galaxy and omega welding machines. The default filename for the programs installer is wps.
This stellite starweld plasma arc transfer is for handling small round part with the integrated welding lathe. If one has to perform weld repairs to an existing stellite 6 hardfacing, your best approach is to use stellite 21. All indents were visually verified in the software for accuracy and the. To start viewing messages, select the forum that you want to visit from the selection below. Global fusion co21 previously known as wdco8 was developed in the mid 1930s as a corrosion resistant cocr alloy, and.
If you want the history of elwood haynes, the inventor of stellite patented 19 heres some great reading. Asme weld number tables are discussed in relation to base metals, filler. This alloy is very popular since it can retain hardness even at elevated temperature. Work hardening behaviour of stellite alloys and nickelbased alloy 18 39. Welding alloys group welding alloys unique experience is drawn from more than 50 years of commitment to research and development of specialized products and solutions. Stainless steel verlays ladding and weld a stainlesssteelcladmetal or alloy is a compositeproductconsistingof athin layer of stainless steel in the form of a veneer integrally bonded to one or both surfaces of the substrate. The cocrw system alloy retains its hardness at elevated temperatures and is especially effective for wear applications at high temperatures or in a corrosive environment, and are widely used as a wear, corrosion, and heatresistant material 43. Aug 01, 2016 this is a clip of our stellite welding services. Stellite 6 in cast and forged satellite 6 in welding rodrods satellite 12 21 satellite valve s urfacing alloy co28mo17cr3si stellite is used for aviation indstry, turine, blade of gas and vessel industry etc. The issue of whether hardfacing adversely affects the properties of duplex stainlesssteel base materials depends on several factors. Our antivirus analysis shows that this download is virus free. Stellite is a nonmagnetic alloy which contains a variety of different metal components with the main elements being cobalt and chromium.
Therefore this allows the spray torch to completely coat the part in the lathe. Austenitic stainless steel was deposited on 9cr1mo steel asme grade 91 by flux cored arc welding process and above that stellite 6 cocr alloy was coated by plasma transferred arc welding process to improve wear resistance for high temperature valves applications. The manufacturer initially drafts a preliminary welding procedure pwps which is used by one of the manufacturers competent welders to prove that it is capable of producing a welded joint to the specified levels of weld quality and mechanical properties. Discussion in shop talk bladesmith questions and answers started by shqxk, jul 21, 2018. During weld cladding the integrity of the clad layer and adequate toughness of. The latest software update applies code rules published in the 2019 edition of asme section ix including 2020 errata and in the 2020 edition of aws d1. Welding procedure specifications wpss national certified. This is a lower hardness version of stellite 6 and is more forgiving less crack sensitive. Compositions of grade 91 substrate, stellite 21 butter layer and stellite 6.
The test samples of coated stellite 6 were taken as pins 6 x 6 x 28 mm and forged alloy steel din 1. We are the goto provider of advanced welding consumables, automated equipment for wear protection, and engineered wear solutions. A wide range of standard alloys chemistry and dimensional allows the flexibility to provide custom materials to unique specifications. Bonding stellite 6 to alloy steel asme mechanical code. Stellite is a range of cobaltchromium alloys designed for wear resistance. It can be applied using a variety of welding processes including manual metal arc mma, gas tungsten arc welding gtaw, gas metal arc welding gmaw, submerged arc welding saw, flux cored arc welding fcaw, plasma transferred arc welding ptaw and laser deposition. Welding procedure welding procedure qualification record procedure software welding software software welding. The surface of the matrix was cleaned with acetone and washed. Guidelines for stellite hardfacing onto steels page 2 of 7 march 22, 2007 carbon equivalent vs preheat temperature 0 50 100 150 200 250 300 350 0. Personally, i have doubts about it being a strong weld.
The cobaltbased stellite alloys are our most well known and. Yes, theoretically, with buttressed inconel 625 welding layer on low alloy steel aisi 4140 or astm a 182 f 22 or f 22 v, you may not need pwht. I bet it will be more expensive than getting a longer piece of stellite. The base metal grouping scheme consists of the p numbers and group numbers.
Invented by elwood haynes in the early 1900s as a substitute. If you going for low dillution then youll have to find a way to pull power out of. Download migatronic welding procedure specifications for the welding procedure mag 5 right here, and use them in your welding production right away. The alloy was solutiontreated and transformed by aging and isothermal transformation at temperatures of 1200 to 1950 degrees fahrenheit for periods of 5 minutes to 72 hours. The alloys may also contain tungsten or molybdenum and a small but important amount of carbon. In addition, the stellite torch is on a series of programmable slides which can move in a certain pattern. Fumes from the normal use of certain hardfacing welding products contain significant quantities of components such as chromium and manganese which can lower the 5. The chemical composition of stellite 6 is given in table 3. Effect of welding variables on cracking in cobaltbased sma hardfacing deposits investigation focuses on establishing guidelines for depositing crackfree hardfacing weld metal by r. Plasma transferred arc welding of stellite 6 alloy on stainless steel for wear resistance. Stellite 21, however, maintained its excellent friction performance at those.
Our software includes all the forms you need to keep your company and welders in compliance. It is made by a company whose name is stellite coatings in the usa and deloro stellite in the rest of the world. Based stellite 21 welding rod cobalt based stellite 21 welding rod specifications. Again, weld repairs to stellite 6 hardfacing should not really be performed. Welding procedure specification download wps here migatronic. Understanding some of the basics about hardfacing can go a long way toward instilling confidence in your hardfacing product selection. If you require any further information on welding or would like a quotation please dont hesitate to call our sales team today on 0191 414 8901 or email. Q235 mild steel was used as substrate, and stellite 6 alloys were welded by plasma transferred arc welding ptaw. Whether you are moving from a paper based system or transitioning from another welding procedure software our implementation staff can assist you.
Gooch introduction weld deposition of hardfacing alloys is commonly employed to increase the service life of components subject to abrasive wear. Prior to that it was owned by union carbide, stellite division. Weld hardfacing and cladding materials guide oerlikon. Universal wire works stellite 31 ams 5789 filler metal. Training and examinations twi certification cswip twi software. Stellite 21 is much less prone to cracking in our experience when we can talk the customer into it over 6 we do it every time. Welders log has the best software product for welding procedures and welder qualification management. Our range of cobalt based hardfacing alloys are available in several grades with high and low carbon content alloyed with mostly chromium and tungsten in. Delamination failures of stellite hardfacing in power. Basically as noted before your going to have a pretty good preheat and post weld treatment and keep it hot while your running it. X is the pnumber of the base metal or metals y is the welding process number based on the table below. Issues such as cracking along the weld line, hydrogeninduced cracking, and porosity, among others, have been reported.
Welders log is one of the leading welding procedure software products available today. Stellite 21 or stellite 6 or ultimet uns r31233 weld overlay where a combination of corrosion and wear resistance is required. Once you have been granted access, click the button below to access technical information. Aug 15, 20 the carbides present in the cocrwbased stellite alloys are of chromiumrich m 7 c 3 type.
Report presenting an investigation of the response of wrought stellite 21, a typical cobaltbase alloy, to heat treatment. Stellite is the brand name of a hardfacing alloy which is widely used for valve seats, especially for valves subjected to abrasive service. Effect of welding variables on cracking in cobaltbased. Alternate stellite process material selection and properties. It would have to be done with tig and stellite filler rod. This study focuses on tribological damages of stellite 21 deposited by mig process. This alloy also has higher hot hardness and resists galling like all stellite alloys when mated with another stellite alloy.
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