Chromoly Vs Mild Steel Weight

Chromoly Vs Mild Steel WeightCrMo: Sometimes referred to as Chromoly, Chromolly, Cromoly, Chrome-Moly, Chrome Molly; Short for Chromium-Molybdenum steel alloys of which 4130 and 4140 are common grades. Chemical Properties The chemical properties of 4130 and 4140 steel are similar aside from differences in Carbon and Manganese concentrations. For instance, a car under 2,500 lbs can be made with 1 1/2". I suggest you go out to your car, and do some measuring. Also the rust is usually only surface rust. A Beginners Guide to Welding Chromoly. The inner rod end is a high-quality chromoly end with nylon race. Mild steel is the type of carbon steel where it contains very low amounts of carbon. For the most part Moly and DOM are very similar metals. OEM Inner axle shaft spline counts are 16, 23, 30, 32, 33 and 35. The 7075 shafts are much stronger than the conventional 6061 shafts and have a slightly higher critical speed property. Billet steel flywheels are usually similar in weight to cast iron, and low-inertia versions are comparable in weight to chromoly (described below). 134 wall thickness (can vary depending on the stick). Tubing itself is not a big difference in price, but if you price out 4130 plate vs mild steel the change is dramatic. Your average 10 point cage has approximately 65′ of tubing. It is easy to machine and bend. I would also consider aluminum, but. I changed to balanced and phased chromoly shafts and rebuilt the trans since I found a chipped tooth in the oil. Also known as Chromoly, CrMo, Chrome-Moly, Chromium Molybdenum. 1020 DOM is about 30% stronger than 1010, 4130 chrome moly even stronger again. Your standard 10, 12 point cage will cert a car to run 8. Steel VS Aluminum Driveshaft. Adding these elements improves the strength to weight ratio of the steel. The biggest advantage, barring a legitimate race need, is weight. 095 Page GCR-91 My question is, to build a roll bar compliant with both rules, will SCCA allow the 1 3/4 ×. Generally, carbon is the most important commercial steel alloy. For instance, the main features of the carbon ASTM A519 Grade 1018 steel pipes strength, some ductility, and comparative ease of machining. bolt in vs welded - welded is much stronger. It is an exceptional welding steel, being weldable in all commercial methods, and is readily machined in its normalized. The roll cage must be constructed of minimum 1 5/8 o. The density of 4130 vs mild steel is virtually the same. In a trail rig like mine, I will be using mild steel and a mig. FORD MUSTANG, MUSTANG GT, SVT COBRA, MACH 1 MUSTANG, SHELBY GT 500, COBRA R, BULLITT MUSTANG, SN95, S197, V6 MUSTANG, FOX BODY. Total weight using a mild steel cage = 740" *. It is malleable and ductile but has low tensile strength. PDF September 3, 2019 M2 Update Success! First Pre. Houston I think we have a problem. The number “30” at the end of the overall grade number means it contains about 0. For the grass roots racer on a budget that we’re targeting here …. 015" of lifter movement is what determines. Some say mild steel flexes more making it better for . We are recognition as one of the worldwide biggest Manufacturer and Distributors of IS 2062. Less or more, but lets just use 120' . Is there any sure way to tell if a frame is made of chromoly 4130 steel? I have the opportunity to buy some lightweight road bike frames . 10/22 steel vs aluminum barrel. The exceptions are 2000 and 7000 series aluminums, which are as strong as some steels. Does it make a difference for a Saturday Night Racer? Short answer, probably not. Global Stainless Steel is a popular Supplier, Stock Holder and Exporter of IS 2062 GRADE A Plates, which has some excellent features to offer such as high durability, precise dimension, robust construction and more. Other things to consider are the flexibility of the frame if it is made of lighter construction. Difference Between Steel vs Aluminum: Weight, Strength. 284lbs/in^3; total weight is 105 lbs. There is an acid test you can use to determine the difference. Weight: Mild Steel weighs less than that of stainless steel. Chromoly or Aluminum for motorcycle. This is offset by using thicker walls, so there is still a weight savings versus steel. Chromoly is a chrome-alloy steel with a medium carbon content and. And it goes beyond the material itself, but also to the way that they are handled in a chassis. Chromoly and DOM steel tubing products are manufactured from high quality it can be used with mild steel, chromoly or another alloy, . Use Chrome Moly for your Cage vs Mild Steel. Telling the difference between Chromoly and MS. THerefore you can use less material when constructed from chromoly. One solid cubic foot so I doubt a . (note: all of the elements plus the iron should add up to 100 wt%). Since chrome-moly is an alloy and stronger than mild steel, you can use a thinner material, which is where the weight savings comes from. If you were to advise him in building rear axle trailing arms with tubular steel, would you advise A) DOM mild steel and MIG, B) Chromoly and MIG with mild steel wire, or C) Chromoly with TIG and the proper filler? How much stronger/lighter is the 4130? Application is the 86 El Camino rear axle. carbon & mild steel: astm a36, is 2062 e250, en8, en9, en31, en36, en42j, c80, c45 alloy steel plates: sa387 gr11, 12, 22, 5, 9, 15mo3, en19 corten steel: corten a, b, astm a588 all plates prime with en10204-3. The addition of chromium and molybdenum as alloying elements, combined with heat treatment, provides the combined advantage of hardness, ductility, and strength. michael smith engineers limited Germany DIN MATERIAL GRADE COMPARISON TABLE Material No. Aluminum — the lightest of the three metals and most expensive. We have ISPM 15 packing solutions for every type of product, and cutting facilities for bar sheet tube and plate products. Properties with values for just one material (1, in this case) are not shown. yield of 36,000 psi, A36 plate can be used in the construction of a variety of lightweight structures and equipment where good welding properties are important. Steel sheets and plates Seamless steel pipes - circular Hollow structural sections - circular Hollow structural sections - square Hollow structural sections - rectangular Round steel bars Square steel bars Flat bars Equal angles Unequal angles Channels - GOST Channels - UPN Beams - IPN Beams - IPE Beams - HEA (IPBL) Beams - HEB (IPB). My race car weighs 3280# and uses 1. Chromoly is superior to mild carbon steel based on a strength to weight ratio, making it widely used in applications that require less weight but similar strength. This is an example of a standard-weight billet steel flywheel. 120" wall of DOM will weigh exactly the same amount as its Chromoly counterpart. When it is butted and shaped to take off excess weight, it can deliver a fairly light frame that will last through years of hard use. It is particularly used for tubular space-frame structures. Light weight steering wheel (there are some very light ones used in circle track, all aluminum). At Short Iron Store in Haslet, TX, . Yes, NHRA requires any chromoly tubing to be TIG welded. Stock chromoly frames are damn near as good as an aftermarket frame, not quite as good, but close. In general both stress and temperature influence on the rate of creep. and cost $1,960 in materials alone. Galvanized steel tube is divided into cold galvanized steel tube, hot galvanized stee. Aluminum is somewhat stiffer than the other two metals meaning that the ride will be slightly harsher. Some vendors bends are much better than others & use higher quality tubing. Although many materials, including steel, can have high stiffness and tensile strength, the real benefits of carbon fiber are its strength-to-weight ratio and stiffness-to-weight ratio due to its low density (around 1. M601 metal pipe bender can do 94 degrees in one shot (hydraulic cylinder length dependent) and go past 180 degrees. Chromoly Steel has an excellent strength to weight ratio and are considerably stronger and harder than standard 1020 steel, but it is not as easy to weld. Chromoly steel is often used when more strength is required than that of mild carbon steel, though it often comes at an increase in cost. , R10 or R16 for 10 or 16 mm diameter). I went with Chromoly due to weight it's about 40 lbs lighter than a similar cage in mild steel. The welded seam is a failure point. Chromoly’s high strength-to-weight ratio and high tensile strength makes it an ideal choice for these particular applications. It should be stamped on the side with the size, and other specs. There is a local guy selling a brand new chromoly kit for cheaper than the mild steel. PDF Round, Square and Rectangular Tube & Pipe. Then the other factor to keep in mind is chromoly vs mild steel tubing. For the grass roots racer on a budget that we're targeting here … It will also cost more. Heat treating can improve material properties - that's heating and cooling the material in a specific way. Even with the possibility of corrosion, steel is harder than aluminum. The same cage in chromoly would be approx 89 lbs to 96 lbs. Steel manufacturers roll substantial quantities at a time, before changing to a different size, so, unless a large amount is required, steel is normally bought from a stockholder. The carbon and other elements are used to harden and strengthen the iron (as well as improve other material properties such as corrosion resistance), allowing the metal to sustain higher loads without failure. - Frame open at heel for stability. It's lighter than carbon steel and equally as strong, but it typically carries a higher price tag. Or sign in with one of these services. The quality of the welding (and the decreased weight) confirms that it is the chromoly version. The thermal conductivity of Ti-6Al-4V - Grade 5 titanium alloy is 6. Vehicle Weight/ Minimum Tubing Size (inches) /outer diameter x wall thickness) Up to 1700 lbs: 1. The results from the tests of the welded T-Joints were quite similar even though the thickness and the diameter of the Docol tubes were smaller. This 5% chromium alloy stainless steel is stronger than mild steel at higher temperatures and holds up well in the mild atmospheres found in the petroleum industry. You'll find it in trigger guards, floorplates, sights, sling swivels and other steel hardware. Complete aluminum road bikes weigh around 18 lbs. K member chromemoly vs mild steal. 625 moly where they would want 1. wanted to know if anybody knows the real weight difference? i was set on the qa1 because of the price and i didn't think it weighed that much more but then. Specifically, 4130 steel – an alloy steel – which is commonly known in the bike industry as chrome-moly, contains the following alloying agents: 0. The difference in weight comes from being able to use. It's up to you to decide whether it's worth it. Weight, chrome moly vs mild steel. I haven't been able to find accurately sized 4130 for quite some time now and the color is. The looptail quad prototype. 0" 6061 aluminum for further increased in critical speed. Chromoly is commonly used to build mid to high-end steel bike frames. Mikey, Do they come in red or other colors to match the car's paint? We can do that! Some examples: That is high quality paint, buffed, with a nice clear coat. This Metal Weight Calculator can calculate the weight on round bar, flat bar, hex bar, plate, sheet, pipe, tube and square bar. Tubes instead are made of mild steel, aluminum, brass, copper, chrome, stainless steel, etc. 69*(OD - Wall Thickness)*Wall Thickness Outer Diameter (i. I read a big argument on the bullet on how mild steel is actually stronger then chromoly Cobra912 Active Member May 1, 2005 1,777 11 39 Wish I was anywhere but here Jun 28, 2010 #5 dude your fine with the mild. (Image/Centerforce) This is an example of a low-inertia billet steel flywheel. Gotta check scca but Silver State will allow. The most popular type of alloy steel is Chromoly steel, which has high amounts of chromium and molybdenum. Chromoly is a very brittle metal, while mild steel is not brittle at all. This gives chromoly a distinct advantage in terms of weight, but that advantage comes at a cost that customers must consider. Estimate about 120' needed for a full cage. The elemental inclusions also affect steel's density, which usually ranges from 7750 kg/m3 to 8050 kg/m3. Stainless tends to be more accurate and is easier to machine. Sold As: 1 Driver Side And 1 Passenger Side Rear Trailing Arm. The number "30" at the end of the overall grade number means it contains about 0. A global network with British roots. The column on the left shows some of the steel grades stocked by Hillfoot, while the middle columns show grades with similar chemistry, and the two columns on the right display grades for potential substitution. Choosing a driveshaft is relatively simple: - 3. Mild steel bend easier than chromoly and is less likely to crack. Chromoly Vs Mild Steel Roll Cage Weight 10 out of 10 based on 656 ratings. Properties of Steel: Steel Grading, Hardness, Yield Strength, and Alloys. PDF Comparing Steel Plate Grades. Also any ideas on the weight savings if I go chromoly or mild steel. Metallurgy Matters: Carbon content, steel classifications. Cage Mustang Body Chromoly Fox Roll. But if the tubing is thick enough to pass the mild steel spec, it was a waste of money to buy chrome moly. Titanium's modulus of elasticity is lower than steel, by nearly a factor of two. The Trek 8000 is available in the following sizes and colors: 16. steel tubing dimensions & weight per foot. But there's one area in which aluminum shines: weight. These are manganese, chromium, and molybdenum. 0 and slower at 3200 pounds max. 50 and faster are required to have a moly cage. psi for a given mass with the significant penalties of increased hardness and decreased weldability. -Please Select- ALUMINIUM - 1050 ALUMINIUM - 2011 ALUMINIUM - 2014 ALUMINIUM - 2024 ALUMINIUM. The Docol-tubes showed a better behavior at fracture compared to the CrMo-tubes. Face plates accepts 3/8" press-in studs. 50 or over 180mph in the 1/4 mile with a 3600lb max weight. Some of the more popular grades of carbon steel are 1018 or 1020 mild steel. Just my thoughts and they aint worth much. The major alloys of 4140 steel are carbon and iron. Chromoly is stronger than normal steel, weight for weight, and is commonly used to make high-end bicycle frames, roll cages for race cars, and for fuselages on small aircraft. Chapel Steel is one of the nation's largest distributors of carbon, high strength, abrasion resistant and specialty grades of steel plate. 1% and the carbon ratio is just 0. Mild steel is general-purpose steel and is used where hardness and tensile strength are not the most important requirements. cons to this are typically the longevity and processing (welding). The following is a comparison of 4130 grade steel and 4140 grade steel. Cage Chromoly Body Fox Roll Mustang. In today's chassis it is common to find Mild Steel ERW tubes, High Strength Steels (HSS) such as DOM and 4130 Chrome Moly (chromoly) and Advanced High Strength Steels (AHSS) like Docol® Tube R8. I would love to believe that mine weights 439 lbs (stock weight minus 25 lbs for TS rear and Carbon can) but we all know that ain't. 9" Mild Steel Rear End 1 3/8" Housing Mounted Spherical Bearing Anti-Roll Bar Assembly. Steel production is an essential part of the global economy because steel is a key material for dozens of industries, including construction, automotive and transport. What is the difference between mild steel and chrome moly. 11 ozs]) for a 30% increase in strength. Chromoly Plate is low-alloy steel plate which is more durable, stronger compared to mild carbon steel. Also called Mild Steel, Low Carbon Steel contains approximately 0. 083 chrome moly tubing, and must conform to the following diagram: The roll cage of any vehicle running 9. Most cycling steel alloys are based on 4130 Chromoly. Steel is graded based upon the percentage of carbon in it. Carbon fiber, meanwhile, is only. Compared to mild steel driveshafts Chrome moly Driveshafts are stronger, they are also able to withstand more torque, and therefore have more stability at high RPM. 120” wall of DOM will weigh exactly the same amount as its Chromoly counterpart. Metallurgy Matters: Carbon content, steel classifications, and alloy steels. Reynolds 525 and 725 use the same base alloy (very similar, if not the same as 4130), but 725 has improved properties due to heat treatment. Most importantly it will handle the everyday wear and tear of city & highway streets like that was it's main intent. 5 cage will cert a car to run 7. Though the densities vary, the density of steel is about 7700 kg/m 3. Carbon Steel vs Alloy Steel. what type of steel tubin /thickness/size makes a good roll cage. METALS & ALLOYS Carbon grades, types, and numbering systems; glossary p. than normal steel, weight for weight, and is commonly used to. He says “very” a lot, but 4130 is not “very” strong and mild steel/1018 “very” weak when you look up actual charts. Some are probably chromoly vs mild steel. PDF Weights of Various Metals in Pounds Per. Mustang Housing Mounted 1 3/8" ARB - 26" Std Coil Over Brkts -. If weight is a concern, then many builders opt for 4130 Chromoly. ) This boom and its carbon-fiber tail is fit for hard flying in. PDF Material Grade Comparison Table. Posted: Fri Mar 12, 2021 6:05 pm Post subject: Re: The weigh-in? chromoly vs HD aluminium? NJ John wrote: I had cheap CB plain steel pushrods (they used to sell them at multiple lengths) on a VZ15 cam. So that's where the weight savings comes in. Our shop does all chromoly tube work. Other gyros compromise with stainless steel stock, but the Sport Copter M2 will have a massively strong 2. A spongy new super-material could be lighter than the flimsiest plastic yet 10 times stronger than steel. Here are a few examples of tubing sizes and weights per foot. 120 sitting in the shed, I wanted to put it in this year but I don't need it yet. Chromoly is also DOM Seamless tubing. We offer round tube, round bar & sheet made from high-quality 4130 Chromoly, providing greater strength & tighter tolerances compared to other metal alloys. Which grade of metal? – Stockholder of. Aerospace is a truly global industry. Some applications require additional hardware. This increased strength to weight ratio in . Answer (1 of 4): Chromoly has a significantly higher strength to weight ratio than mild steel. We will use chromoly if we are trying to build something that is very weight-conscious or needs to. Well since you fabricate, then you know mild steel takes well to mig and chromolly does really well with tig. The thermal conductivity of typical steel is 20 W/ (m. 4140/42 and 4130 Mechanical Tubing are medium carbon alloy grades, which are widely used for many general-purpose applications that require high tensile strength and toughness. A 10-point chromoly cage will save roughly 50-pounds over one made with mild steel, but will cost roughly $350 more. Yes, chromoly steel is much stronger than mild steel. What are the differences between a mild steel tube frame (like a haslag) or a full chrome moly tube frame? Maybe weight and how much . 4130 alloying elements include Chromium and Molybdenum, and for this reason, it is commonly referred to as Chromoly or Chrome Moly. Chrome moly is actually stiffer than mild steel so it lets you run a thinner wall pipe to active the same strength. It is a steel that is stronger than carbon steel (more commonly used in bike manufacturing), so we can use thin wall tubing, giving you a lightweight frame that will last through years of riding. Steel Weight Calculator - Stainless, Aluminum, Nickel, Titanium & More! | TW Metals JavaScript seems to be disabled in your browser. The key difference between mild steel and high tensile steel is that high tensile steel has a high strength than mild steel. square tubing strengths?. Typhoon Bolt in 4 Link Success. I figure I could have dropped around 30 lbs total. Bends a variety of metals - Mild/Carbon Steel, Chromoly, Stainless Steel, Aluminum. - Grain Flow Forged from single billet of 1025E Pure Select Mild Carbon Steel. Working with chromoly steel affords us the flexibility we need. Chromoly boasts a yield rate of around 80 ksi, while the DOM again falls a bit short at 70 ksi. Use our weight calculator to calculate the weight of various forms including box sections, sheets, bars and pipes. AKA mild steel, where the carbon content is between 0. Thus, to determine the estimated weight of carbon alloy tube weight please follow the links below. 1026 grade is normally used in the manufacturing of DOM over 2" OD, with walls heavier than. 5 cage can be either mild steel or chromoly, however, a 25. The process is highly stable and produces an even nickel coating. Use with our Eliminator II 4-link and tubular A-arm. Featuring an upper 3/16-inch mild steel Mohawk gusset to prevent bending of the radius rod. In reality - it is all about how the cage is designed. The SAE steel grades system is a standard alloy numbering system (SAE J1086 - Numbering Metals and Alloys) for steel grades maintained by SAE International. A roundabout average is what I'm looking for. 0 mtrs-Price mentioned is of per mtr. and wall thickness a chrome moly tube weighs the same as a mild steel tube. The new super-material is made up of flecks of graphene squished and fused together into a. Chrome moly is stronger than standard stainless steel, and has a high strength-to-weight ratio. To get started, choose an alloy and a form from the options below, complete the required information and hit the calculate button. MIG Welding Electrodes Wire Selection, Charts Settings and. Aluminum is a distant second at 65. Cast steel only has 66% of the yield strength of forged steel. 4130 steel is a chromium-molybdenum alloy steel and is considered a low carbon steel. Al vs Steel vs Ti Why choose steel? Steel ensures high performance at really low weights. Use ER70S6 filler and just weld it as if it were standard low carbon steel. Reinforcing steel is either mild, or high yield. Metal Tube Bender M601 & 1 Die (Standard Duty) Rated 5. As seen in Table 1, mild steel has a yield strength around 50 ksi. Now, The 740" is a very rough measurement. The heat transfer characteristics of a solid material are measured by a property called the thermal conductivity, k (or λ), measured in W/m. IS 2062 High Tensile GRADE E300B Coils, which is available in various specifications. The Chromoly cages actually have a thinner wall, hence the reduction in weight over the mild steel cages. Our innovative approach means you get the benefit of state-of-the-art technology coupled with personal. The advantage to 4140 vs mild steel is the strength to weight. Mild steel weld done with a ER70S-6 electrode and C25 gas. A popular example and perennial favorite in the U. Lighter and more robust than carbon steel. Top of line paint work :) For that you are lookingat $479. Metal Weight Calculators can help determine the weight of any number of types of material. Aluminum is by far more popular, and M-W's exclusive 7075 alloy driveshafts are 13. Yield strength is an indicator of what load a shackle will hold before starting to deform. These efforts were similar and overlapped significantly. 4130 Chromoly Pipe & Tube. DOM is commonly used in the manufacturing of race cars and motorcycle frames. Specific Gravity Of General Materials Table. **Chromoly steel tube: its about twice the cost of the mild steel DOM, and about 40% stronger, which means you can use thinner wall tubing and effectively have a lighter vehicle. Mild steel does not weigh less than chromoly. 50 or slower at a max weight of 3600 pounds. 083 for Chromoly? The rulebook did not specify different thicknesses for DOM vs Chromoly. 95 Read more Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low. Lets compare the weight savings of going with chromoly tubing. Available in Mild Steel or 4130 Chromoly Steel. The outer end of the rod uses a Polaris OEM spherical bearing mounted inside of a CNC steel bearing housing. It Electron Beam welds well except for free machining grades. Moly cage is lighter cause nhra allows thinner wall tubing with moly. Chromoly steel does cost more than mild steel, but the strength and durability of chromoly combined with the ability to use less than its standard steel . In terms of steel, Chromoly is estimated to be in the hundredths of a pound per square inch more than mild steel meaning the entire shaft is a fraction of a pound heavier. We are an industry leader of value-added services supporting a vast customer base of end use markets. A good way to remember the density of steel is to remember that titanium has about half the density of steel and aluminum is about one-third. 125" wall Chrome Moly axle tubes instead of Mild Steel. Steel is steel and it weighs what it weighs. When cost is a factor, as for most of us, mild steel is a good choice. General regulations section 21 page 21 SCCA roll bar specs 2700lbs and up are 1 3/4 ×. Often, these types of steel have higher strengths, toughness, and wear resistance than other steels. Mild steel can be done by MIG or TIG. We Made an App for That! Use your phone or other mobile device to view this calculator in your device's browser, then follow the prompts to add it as an icon!. Chromoly is stronger than normal steel, weight for weight, and is commonly used to make high-end bicycle frames, roll cages for race cars, and . For the most part, if you are mig welding , use DOM. The thing about chromoly is that it takes so much more . However, depending on how you join your tubing, you may need to heat treat the finished product. 2 cage will cert a car to run 6. 00 out of 5 based on 54 customer ratings. CAD designed and CNC manufactured in-house. 4130 is a high tensile grade of steel that contains chromium and molybdenum, and as a result this grade is often referred to as chromoly steel, chrome-moly, CrMo, CRMO, CR-MOLY. Also known as Mild Steel, low carbon steel contains approximately 0. It contains Chromium and molybdenum a splash of carbon and mostly iron. Steel Grade Equivalents The table below details similar grades to the most commonly used engineering steels. Chromium makes chromium oxide on the surface which is makes a clear coating on the surface which resists attack from oxygen and many chemicals. Low Carbon Steel 120 68 S 4-6% Chrome 1/2% Moly K42544 130 72 F5 Type 304 Stainless Steel S30400 160 83 S304 Type 316 Stainless Steel S31600 160 83 S316 Type 347 Stainless Steel S34700 160 83 S347 Type 410 Stainless Steel S41000 170 86 S410 Titanium Grade 2 R50400 Alloy 600 N06600 200 Alloy 625 N06625 200 Alloy 800 N08800 200 Alloy 825 N08825 160. Understand that it must be TIG welded if you want it to certify. Chromoly is the informal name for 41xx steel, an alloying steel that's strengthened with chromium and molybdenum. 118 is for mild steel either DOM or ERW, however. The added chromium and molybdenum help to give the steel different properties from its mild steel counterpart, AISI 1030, even though they have the same percentage of carbon. Me if I had to build my car again I would run lighter wall chromoly (especially in certain areas). Colnago's steel frames are still made in Italy and fans of steel consider them among the very best available ferrous frames. 40 Spline inner axle shafts and carriers are made for after market, high performance Dana 60 axles. Eliminator II A-Arm Truck Chassis (Mild-Steel) - 1982-2004 Chevy S-10 E-mail this product to a friend: For '82-04 Chevy S-10 standard cab trucks with a 108" wheel base or extended cab trucks with a 118" wheel base. Mild steel is used in a variety of applications from car doors to structural supports in . Does anyone know the benefits between the two. Both stainless and chrome-moly barrels erode. Includes drain plug and filler plug.