Some of the markings on here will indicate that it's a grade 8, grade 5, grade 2, standard alloy, 316 stainless, or 18-8 stainless. Cold forming and threading cause stainless bolts to become slightly magnetic, some fasteners will be more magnetic than others depending on size and how quick the cold forming process is. The specifications vary according to the IS, BS and ASTM standards. The majority of these are characterized by a DIMPLE or a DOT which assists in verifying a proper alloy. You can see here that it says S-3-1-6-0-0 and at the bottom you see the manufacturers marking again THE. (Between 15%-20% Chromium, Between 5%-19% Nickel) - Austenitic stainless has the highest degree of corrosion resistance of the three types. feet. This will end up being non-magnetic. This is a stainless bolt. Untreated alloy steel fasteners are black. So when you buy bolts, you want to make sure that you have the correct bolt for your application. As far as grades go, I was showing you the grades, most plain bolts, other than structural, will have the grade 8 markings on them. Stainless alloy resists oxidizing and rusting, however it can tarnish over time. Grade A and Grade 2 are the most common grades of zinc plated alloy steel. So there's no twisting, turning, hammering, banging of the stainless. (Between 12%-18% Chromium) - Martensitic stainless steel is considered a magnetic steel. For the best experience on our site, be sure to turn on Javascript in your browser. What you're buying. Suraj Metal Corporationis a leading manufacturer and supplier of the different types such as the SS 304 Hex Bolt in different sizes and grades. Stainless Steel 304 Bolts are made up of a basic austenitic stainless steel material that has 18% chromium and 8% nickel in the composition. All right, I have a bunch of bolts here and I just wanted to go through the markings on these bolts so you understand them when you read them. ASME B1.1, UNC & UNF, Class 2A (Fastenal will inspect and accept parts with a 1A no-go gauge), Zinc Plated (Yellow, White, Blue, Black), Hop Dip Galvanized (HDG) phosphorization, Black Oxide, Geomet, Dacroment, anodization, Nickel plated, Zinc-Nickel plated, Brass Plated, Tin Plated, Black Plated, Copper Plated, Gold Plated, Salt fog test, Stainless steel: All DIN, GB Standard and part ASNI standard stainless steel 304 Bolts, Example: ISO7380, DIN7981, DIN7982, DIN916, DIN913, DIN7985, DIN912, Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing, Regular product is about 7-15 days, custom product will according to special requirement, Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request, T/T, Paypal, Western Union, L/C or Trade Assurance 30% deposit & balance before shipping, aisi304, AISI 304, T304, T 304, SUS304, SS304, 304SS, 304 SS, UNS S30400, AMS 5501, AMS 5513, AMS 5560, AMS 5565, AMS 5566, AMS 5567, AMS 5639, AMS 5697, ASTM A193, ASTM A194, AFED QQ-S-763, MILSPEC MIL-S-5059, SAE 30304, DIN 1.4301, X5CrNi189, B.S. Copyright 2022 Albany County Fasteners. In cars, you don't want to use a grade two for certain applications such as, suspension, tying in your front arms, it's not made for that. Brass conducts electricity and is also a good conductor of heat. Aluminum rivets are among the most common aluminum fasteners. This is a heavily used item for fasteners with saltwater day in and day out. Machine screws: flat head, oval head and pan head screws. (16%-18% Chrome, 10%-14% Nickel, .08% Maximum Carbon, 2.00% Maximum Molybdenum) - This grade of steel is used and recommended for applications in severe, harsh or marine environments. Then after it's cut a tap goes in and threads the inside. You'll find alloy steel, which are these here. They are also used extensively in the chemical industry due to their strong resistance to corrosion and oxidizing chemicals. 6331 Cullen Blvd. 303 and 304 Stainless are the most commonly listed grades, the standard grade for stainless fasteners. Therefore they are not required to be changed at short intervals. Aluminum should never be used with Stainless Steel, galvanic corrosion may occur. The tensile strength of titanium can reach or exceed 150,000 PSI. As SS 304L bolt distributor, Bayou City Bolt offers stainless for applications such as architecture, aerospace, and more. The 304 material is strong and has minimum 170MPa yield strength for 304L material and up to 205MPa for 304 and 304H materials. That will help to pick the right material. They are used in place of studs with nuts. Asiad Steels are ss 304 nut bolt manufacturer which are demanded worldwide. The material is also capable of operating under temperatures up to 870 degrees Celsius. Ferritic Stainless Steel They also have a tensile strength of between 80,000 - 150,000 PSI. This type of stainless includes: 410, 416, 420 and 431. (Between 12%-18% Chromium) - Martensitic stainless steel is considered a magnetic steel. That's the manufacturer that made the bolt and the last one: this is 316 stainless. The length of the 1.4301 304 Stainless Steel Threaded Rod ranges from M02 to M33 in the metric system. These properties are inherited by the SS 304 Hex Bolts because of the chromium content in the alloyWe are well recognised for being one of the best SS 304 Fasteners Manufacturers In India. As a leading SS 304 Nut Bolt Manufacturer we supply these fasteners in all grades and dimensions. Grade 8 is heat treated. Houston, TX 77021, Toll Free: 800-747-1821 They also have a tensile strength of between 80,000 - 150,000 PSI. For use in outdoor or corrosive environments. Stainless is a soft metal due to the low carbon content, therefore most stainless steel bolts are cold-formed and not heat treated or thru-hardened. Top subscription boxes right to your door, 1996-2022, Amazon.com, Inc. or its affiliates. They have a tensile strength of between 180,000 and 250,000 PSI. It can be heat treated to increase its hardness and is not recommended for welding. 305 stainless steel is most commonly used to make deck screws, which are used to fasten wood or composite boards to the main beams of a deck. Really the only one that's non-magnetic, other than some special stainless, is this 316 stainless and that's the stainless you use in salt-water applications and that's the one that you won't find surface corrosion or deep corrosion. Need help? d ) 410 Stainless Steel: While it is still corrosion resistant, it is not recommended for areas where corrosion is likely to occur. We offer the lowest minimums in the industry, and sell by the piece or in bulk - you buy only the fasteners you need! Due to the forming process it is magnetic and not suitable for welding. Typically, you'll see initials on there, this is an lb okay? A nut is not worked, it's just cut. 316 Improved corrosion resistance when exposed to seawater and many types of chemicals. This is just a grade 8 plain bolt. Just for your information. First, I'm going to show you this piece of paper here which basically shows you the standard markings, according to IFI requirements, and when you look at this you can see that some bolt's heads have absolutely no markings, some have strikes on them, and then some have like a number and a letter on it, like a b7. So, with a grade 8, this falls under the SAE J429. Zinc plated alloy steel is most often available in Grade A, Grade C, Grade 2, Grade 5 and Grade 8. This is just a plain piece of stock, 5/16 inch diameter dowel pin, and all they do is cut it. Nickel works well in high and low temperature environments. Body Diameter - There may be a reasonable swell or fin under the head or die seam on the body not to exceed the basic bolt diameter by the following: Weight in kgs. Bolts, Nuts, Sockets, Screws, Screw, Studs, Socket Screw, Hex Set Screw, Cap Screw, Machine Screw, Pan Head Screw, Allen Cap screw, Socket Head Cap Screw, Wing Screw, Spring Washers, Washers, Studs, Marine Anchors, Anchors, Hexagon Nut, Nut, Hex Coupling Nut, Hex Nut, Square Nut, Hex Domed Cap Nuts, Hex Head Bolts, Stud Bolts, Socket Hexagon Head Screw,U- Bolts, Anchor Bolt, Mushroom Head Square Neck Bolts, J Bolts, Wing Screw, T-Head Bolts, Foundation Bolts, Eye Bolt,Structural Bolts. Visit our Shop by Materials page to shop only that material! JavaScript seems to be disabled in your browser. There is brass out there that they do use lead in. When you go out and you're looking for a grade 5 bolt, you're always looking for the three slashes on the bolt. The question of the day: is stainless steel magnetic? Stainless Steel 304L Socket Cap Screws is a lower carbon variant of SS 304 which can be welded without the resulting issue of carbon precipitation. 2021 SFS Group USA, Inc.all rights reserved. Stainless Steel 304H Hex Cap Screws has greater short term and long term creep strength than SS 304L at temperatures above 500 Degree C. The higher carbon content of Stainless Steel 304H Hex Screws may lead to sensitization with a concomitant loss of corrosion resistance in a corrosive environment. So I get calls all the time from customers questioning: why is this stainless magnetic or partially magnetic? Then they just chamfer the edges so there's no bending or twisting of this and you will see its non-magnetic. They are often used in marine applications in freshwater environments but will not work as effectively in a salt-water environment as 316 stainless. Fax: 713-747-3924, Houston SEO Services Provided By TopSpot Internet Marketing, 304 The most popular stainless for hex head cap screws. With constant improvement in quality we have been able to excel in the manufacturing process for the above steels and their respective grades. Please feel free to contact us for more information and pricing of the different fasteners such as the UNS S30400 SS 304 Stud Bolts and the prices. This grade 2 bolt has no markings, no slashes at all. Note: If you are not in an oxygen rich environment the material will take longer to rebuild or not rebuild at all. This I spoke to you before, hot-dip galvanized bolts are typically just grade 2 bolts and they are treated and dipped into a hot dip galvanized bath and they're brought out of the bath and then drained. That's all the 316 stainless. This is brass. Buy SS 304 Bolts, SS 304H Bolts and SS 304L Bolts in leading market price from us. Just google that and you'll find all the information in reference to the treatment of a grade 8 bolt. 3 mm You can see the grade 8. This series offers superior performance when products are to be exposed to sea water and is resistant to corrosion in sulphuric acid compounds. 304 S 15, EN 58E, PN 86020 (Poland), OH18N9, ISO 4954 X5CrNi189E, ISO 683/13 11, 18-8, Electroplating (color, blue, white, black zinc, Ni, Cr, tin, copper, silver). You can tell by the markings on the head, but I'm going to show you an even better one. As a leading manufacturer, we also produce and supply different types of SS 304 Screw in different sizes as well. Below are some of the many bolt grades of stainless steel that we carry. Ours are grade eight or better, and that's the way that they're indicated on our website, as grade 8 or better, and you will see the grade 8 slashes on the head. Case hardened low or medium carbon steel. Nickel fasteners are very strong, extra-ordinarily tough and ductile. The bolts range from 3mm to 200mm. 307A is the indication of the strength of the bolt. Besides being versatile, type 304 stainless steel fasteners offer an economical alternative to other stainless steel. Contact us today to learn more about our stainless steel 304 and 316fastener supplies. It is also harden-able by cold working. It meets standard corrosion requirements at a lower cost than the higher grade material. Nickel is often used with other materials to create an even stronger fastener. This allows the fasteners to be used in most applications with moderate strength requirements. These are typically heated up to about 650 degrees when they're treated. Alloy steel fasteners are often treated, coated or plated with zinc for additional corrosion resistance. Want to learn more about Fasteners? That's 304 stainless steel. The considerable strength, corrosion resistance and the low cost of the material are the reasons for the widespread use of fasteners in this material grade. It's not as strong as with the 316. Scratching or burring the metal will not create surface rust as the corrosion resistance exists within the metal itself. You cannot use a zinc nut with a hot dip galvanized nut, it just won't go on properly and you're going to have problems. Typically it is partially magnetic. to The different classes come with their different mechanical properties but the 304 material has fair strength and corrosion resistance. This gives these fasteners much better levels of resistance to corrosion than the 304 series. 18-8 stainless. 304 and 316 stainless steel fasteners are not the only material options available for consumers. In this situation it also has another manufacturers marking on it: F-5-9-3-H. You can see that there, then it has like a logo punched into the head. All Rights Reserved. For full functionality of this site it is necessary to enable JavaScript. Big Bolt Nut is the biggest and the largest producer for stainless steel ( SS ) hex bolts, hex screws, hex nuts, washers For the best quality hex tap bolts see Allfasteners, Americas place for All Things Fastenings. This is a grade two bolt. While the 300 series offers superior corrosion resistance, the 400 series provides an elevated hardness. All environmental conditions are based on EN ISO 12944 Exposure Categories. The most important thing to know about SS 304 Bolts are Torque chart, Strength, Shear Strength, Grades, Mechanical properties, Torq chart metric and yield strength. On to the next one, you can see a THE at the bottom. Martensitic Stainless Steel 316 stainless is typically non-magnetic, however there is a challenge and we'll talk about that in a minute. and bolts, 304 bolt nut, 304 nut bolt, 316 Bolts and nuts, 316 fasteners, 316 hex bolts, 316S31 bolts and nuts, stainless fasteners. Stainless steel in general offers significant corrosion resistance when compared to standard carbon steel materials. Our team is ready to answer all your questions and help place your order. When you're dealing with grade 8, these are through-and-through heated bolts so they're treated for strength. Environmental grades are taken from ISO 12944. Within the stainless steel classifications, there are grades that will outperform others. This is silicon bronze. You have a manufacturer's mark to them. Alloy 304 Bolts (Din 1.4301 Bolts) This is very common in those applications. This is a rivet, stainless steel-304 stainless. (17%-19% Chrome, 8%-10% Nickel, .12% Maximum Carbon) - This grade has been developed specifically to improve the cold heading qualities of 18-8. used in marine, sewage, water and desalination plants in counties like, Oman, U.A.E., Qatar, Dubai, Bahrain, Saudi Arabia. Other than being recognized for its corrosion resistance properties, the SS 304 Fasteners have good toughness and hardness properties. The combination of material, treatment, hardening, and coating (aka plating) are essential to determining the strength and appropriate application for each fastener. Furthermore, if a bolt grade is 316 stainless, prized for extra corrosion resistance, we always recommend using 316 when replacing and not a lesser bolt grade such as 304 or 303. These fasteners are ideal of use where there is exposure to chemicals and other types of corrosive products such as chloride which tends to cause pitting. Commonly used for self-drilling and tapping screws. These letters that you're seeing is the manufacturer's markings, so they can identify, should the bolt fail, they can identify if this is their bolt or not. For the best experience on our site, be sure to turn on Javascript in your browser. It doesn't matter if it's made here in the USA, it doesn't matter if it's made in Taiwan, or it's made in India, if it changes the makeup of stainless when you cold form it, that's what makes it magnetic. (17%-19% Chrome, 8%-10% Nickel, .12% Maximum Carbon) - This grade has been developed specifically to improve the cold heading qualities of 18-8. Alternatively, 316 SS fasteners tend to be used by contractors who operate in highly corrosive environments. Also check our 304 stainless steel threaded rod price per piece. Harder than 18-8 stainless but with less corrosion resistance, 410 stainless is commonly used to make roofing screws, siding screws and self-tapping (or self-drilling) screws, because it is a harder material than the metal being fastened in these types of applications. Brass again used in plumbing, hot water, these typically have no heavy strength to them at all. The S stands for stainless and the 30400 is the marking for stainless steel and those markings that you're seeing on these bolts are standard to IFI recommendations which are standardized throughout the industry. Grade 5 bolts have three (3) evenly spaced hash marks on the head markings (manufacturers mark may also be included). Stainless Steel is an iron-based alloy that must contain at least 10.5% chromium. We will 304L This is a lower carbon version of type 304 which is slightly lower in strength but has increased corrosion resistance and welding capacity. Copyright 2022 Marsh Fasteners. 304 stainless bolts are strong bolts but extremely brittle and hence need to handled carefully. You can look that up to go over on google. Alloy Steel is the most common material that fasteners are manufactured in. So let's get started. 305 stainless steel is most commonly used to make deck screws, which are used to fasten wood or composite boards to the main beams of a deck. Below are some of the many bolt grades of stainless steel that we carry. 303 and 304 Stainless are the most commonly listed grades, the standard grade for stainless fasteners. Stainless steel fasteners can offer a wide variety of strength and corrosion-resistant properties to meet your requirements. Now I'm going to show you a nut, which is stainless 316. Click on the link given here to know more about the SS 304 Fasteners Price List. Untreated alloy steel fasteners are black. It will not pick up the magnet at all. Grade C is a thru-hardened medium carbon zinc plated alloy steel. The SS 304 Nut Bolt can have up to 515MPa minimum tensile strength and 40% elongation with 201HB max hardness. This chromium creates a surface film that resists oxidation. get back to you with 2 business days. Hot dipped galvanized coat alloy steel. Stainless Steel UNS S30403 Machine Screws is often used in food processing equipment, particularly in beer brewing, milk processing, and wine making. Stainless Steel UNS S30409 Allen Cap Screws is often used in industrial boilers, pressure vessels, heat exchangers, pipelines and condensers. We do bring that to everybody's attention in reference to brass. On this one we have three slashes and typically three slashes is going to be grade 5. Office 2: +91-22-66644059, Plot No 02 Ground Floor, Gardanchs LTD Bhajekar Street, Opp 11 Khetwadi Main Road, Copper is used in very specific applications. Okay, so this here has no markings on it. You would find these to be the standard type 2, or equal to type 2 bolts. You can get some decent corrosion resistance out of that, and you can see, the magnet sticks right to it. These are ideal for engines and motors. Aluminum alloy may be comprised of several materials including iron, manganese, silicon, copper, zinc and silicon. In applications where there is no room for nuts and the application surface has to remain safe, the din 1.4301 screws are used. That's the Hat part and this is the mandrel. They work well in high temperature environments and is used largely by the aerospace industry. This is a structural steel bolt, or they call this a structural bolt. Fasteners made of nickel-copper alloys have a tensile strength of roughly 80,000 PSI while fasteners made of nickel-copper-aluminum have a tensile strength of around 130,000 PSI. So this hex cap screw is magnetic. Alloy 304H Bolts Have questionsabout these products and their applications? Skip to the beginning of the images gallery, Medium Split Lock Washer 18.8 Stainless Steel. Silicon bronze fasteners are made of copper, silicon, and various other alloys such as zinc, tin, iron and manganese. It is also known as the 18 - 8 chromium nickel grade by the SS 304 Nut Bolt Manufacturer. in India, we have 2 factories with a total covered area of over 100,00 sq. The information from this chart is derived from the MCA technical document, "Fastener Compatibility with Profiled Metal Roof and Wall Panels". 410 A chromium alloy containing no nickel. The SS 304 Hex Bolts are some of the preferred fasteners due to their geometrical strength and ease of application with tools. Its corrosion resistance is greater than 18-8 stainless, which is why we recommend using 316 stainless steel fasteners for salt-water application. So the answer is that some parts in 316-if you were to buy 316 unformed, untooled, in a stock piece of stainless, it would be non-magnetic. A Division of RAW Products Corp. By using this site you agree to the terms and conditions. The difference between 304 and 316 stainless steel fasteners, Sheet metal screws: Type A Threads favorably used in many marine and assembly applications, Machine screws: flat head, oval head, pan head, truss head, flat head slotted machine screws and hex head indented machine screws, Bolts: hex head bolts, Tap head (full thread), carriage and lag bolts, Nuts: machine screw, finish hexagon, nylon insert lock, acorn cap, coupling, wing, K kep, serrated flange, tee, thin jam, all metal hexagon, barrel, carriage cap and heavy nuts, Washers: flat, lock, fender, finish, internal / external star lock, neoprene bonding, AN flat, SAE flat and square washers. Receive the latest news on new promotions, exclusive offers, and new arrivals. All magnetic. (Between 15%-20% Chromium, Between 5%-19% Nickel) - Austenitic stainless has the highest degree of corrosion resistance of the three types. Grade 8. Alloy steel is used for the hot dipped galvanized process, treated in a molten zinc bath which creates a tightly bonded alloy finish. For example, 410 SS has a low alloy content, meaning that there are fewer materials added to its composition, resulting in a higher carbon content. They do not describe specific quantitative criteria for pollution levels, but are instead meant to be standard guidelines for generalized environmental conditions. (Between 15%-18% Chromium) - Ferritic stainless steel has a tensile strength of 65,000 - 87,000 PSI. That's a manufacturer's mark and you will see here S30400. SFS offers multiple products that utilize the corrosive resistant properties of 304 stainless steel. The 304 material has 205MPa minimum yield strength and 515MPa minimum tensile strength. This increased amount of carbon gives the 400 series of stainless steels increased strength characteristics as well as better performance at elevated temperatures while still maintaining some corrosive resistance. They are corrosion-resistant and durable. They come with an actual marking of the level of stainless. Zinc Plated Alloy Steel is a common material that fasteners are manufactured in. Equivalent to metric A2 Stainless Steel. Feel free toget in touch with us. Popular examples include the Bi-Met 300 series curtain wall screws series or in the stainless self-tappers. Not holding. You see the JH there? Magnetized. Ferritic grades of stainless include: 430 and 430F. Silicon Bronze is superior in corrosion resistance to 316 stainless steel; it is more expensive than most fasteners. unless otherwise specified. Lead is used today in many, many brass products. There is very little overall difference in corrosion resistance among these 18-8 series types. (11.5%-13.5% Chrome, .15% Maximum Carbon) - Since this grade of stainless steel can be hardened up to approximately 40 Rockwell C, it is durable in most environments. Zinc coated or plated. Viha Steel & Forging is one of the leading ASTM A193 Stainless Steel 304 Fasteners Manufacturer in India and we produce the fasteners in different types and classes. With our friendly and knowledgeable staff, excellent stock inventory, competitive pricing and a variety of services for all types of industries, you can rest assured that we have all of your project construction needs covered. Technology Driven, High Performance Fasteners. It also has a higher tensile strength at higher temperatures. Grade 5 alloy steel is a medium carbon zinc plated alloy steel that is heat treated to increase hardness. Totally untrue. An aluminum rivet is obviously a metal that is not magnetic and it will not pick up at all. Harder than 18-8 stainless but with less corrosion resistance, 410 stainless is commonly used to make roofing screws, siding screws and self-. This one here, this is an S316, so this is a higher grade stainless steel. These are very commonly used in situations where you need a very strong bolt. Sheet metal screws: flat head, oval head and pan head screws. Contact us today! This type of stainless includes these grades: 302, 303, 304, 304L, 316, 32, 347 and 348. The fasteners of this material grade are used under high pressure applications as well. The color of brass can vary from dark to light based on the zinc content; more zinc content produces lighter brass. The high mechanical properties come through the chemical composition with carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel and nitrogen. Alloy steel, aluminum, brass, silicon bronze, and stainless steel are just some of the materials that fasteners are manufactured in. You'll see it'll just drop off. The fasteners can come as threaded rods, screws, bolts, nuts and washers. Again you see JDF on that bolt on the top. At Marsh Fasteners, we have over 20 years experience as a leading source for quality stainless steel and marine grade fasteners and hardware. So if you really want total non-magnetic there's aluminum and that's basically my demonstration of showing you that stainless steel, depending upon how it's been treated, becomes magnetic. 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This is how you tell the difference. There would be rust resistance if hot dip galvanized. So, because of the hot dip galvanizing process, (the zinc) is so thick they have to adjust the threads, so they'd properly coat the thread. I'm Bob and today we're gonna talk about markings on heads. This material cannot be heat treated. That's the only way they, oh I'm sorry, they do come in hot dip galvanized also, but the most common used is oil finish. It can be heat treated to increase its hardness and is not recommended for welding.

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