Alloy Steel Nut and Bolt Manufacturers, Suppliers in India – ASTM A193, ASTM A194, B7, B16, B8, B8M, Hex Nut & Bolt, Hex Jam Nut, Hex Flange Nut, Stud Bolts, Anchor Bolt

• Alloy Steel Nuts and Bolts Available on Sale, by India’s Largest Stockholder and Manufacturer. Alloy steel bolts are made from a high strength steel alloy and are further heat treated. Alloy steel bolts are typically not plated, resulting in a dull black finish. Alloy steel bolts are extremely strong but very brittle. Alloy Steel Grade Bolts / Nuts, which is highly used in commercial complexes. Chromium, vanadium, molybdenum, and tungsten in these Alloy Steel Grade Hex Head Bolts increase strength by forming second – phase carbides.
• A stud bolt consists of one threaded steel rod and two (matching) hexagonal heavy steel nuts. Stud bolts and nuts are essential components of flanged joints, as they are key to seal flanged joints properly. The ASTM A194 specification covers a variety of low carbon, medium carbon, alloy steel, and martensitic and austenitic stainless steel nuts. Hex heavy nuts are components of boltings sets for flanges. The ASME B16.5 specification covers stud bolts and nuts for ASME flanges. Stud bolts and nuts are available in multiple diameters and lengths combinations, metric and imperial, and in a variety of materials from carbon steel to alloy, stainless and nickel alloys. The material of the hex steel nuts shall match the material of the threaded rod (generally, stud materials ASTM A193 match with nuts materials ASTM A194).
• Metallica provides the value added services, such as the heat treating, cutting, machining, painting and assembly. Metallica makes it easy for you to source top quality alloy steel nuts and bolts at the lowest prices in India. We specialize in providing deliveries to your factory directly from our warehouse or our principal suppliers.
• We offer a wide selection of specialty alloy steel nuts and bolts; and best pricing for bulk nut orders. A complete range of alloy steel nuts and bolts are in stock and ready to dispatch.  Specialty bolts ranging from tiny to extra long and even extra large bolts are available in many grades and drives.
• We are top manufacturers, stockholder and suppliers of alloy steel nuts and bolts in accordance with DIN, ASME, ASTM and ISO standards such as ASTM A193 (for bolts) and ASTM A194 (for nuts) and grades including B7, B16, B8 (Class 1 & 2), B8M (Class 1 & 2). All our alloy steel nuts and bolts are supplied with 3.1 specific test certificates, according to EN 10204. Certification according to 3.2 can be agreed at the time of ordering.

Manufacturing Fasteners – Alloy Steel Nut, Bolts, Screws & Washers

Alloy steel fasteners, nuts, bolts and screws are generally manufactured by two processes namely cold forging and hot forging.

• The cold forging process is generally used for manufacturing small size fasteners while hot forging process is used for large size bolts and nuts. The cold forging process starts with large steel wire rods, which are uncoiled and cut to length. This is followed by pressure forging, cold extrusion and reducing, or a combination of these procedures, followed by heat treating to improve strength and surface treating to improve durability.
• Many other fasteners are also produced by the cold forming or forging process especially for producing large quantities, as it reduces the cost of production. The choice of the suitable forming machine depends on the size of the fastener and on the degree of forming. The greater the degree of forming, the more forming stages are required.
• Screws are usually produced by cold forming process where in we usually receive the wire coiled on rolls.
• Heat treatment process is used after the fastener production to increase the strength or control the mechanical properties of fasteners.
• Nuts are usually produced with the cold or hot forming procedure as well. The choice of one or the other procedure depends on the one hand on the size and on the other on the required quantities.
• The hot forging or forming production method is used mainly to manufacture large diameters starting with approx. M27, and longer pieces starting from approx. 300 mm. In addition, parts are possible that cannot be produced using cold forming because of the very small volumes, or because of a very high degree of forming.
• Washers are produced by punching or forming process. The manufacturing process starts with making of punching die as per the required internal and external diameter of washer.

Chemical Composition of Alloy Steel Nuts and Bolts

Material Specification of Alloy Steel Nuts and Bolts

Types of Alloy Steel Nuts and Bolts

We Manufacture and Supply Multiple Steel Grades and Finishes for Bolts with choices of small to large and short to extra Long Bolt Sizes

Alloy Steel Nut Specifications, Stock & Production Range

• Email Us on info@metallicametals.com for best prices on various types of Alloy Steel Hex Nuts

Types of Alloy Steel

There are 2 major types of alloy steel.
1. High-Alloy Steel: –
High-alloy steels are defined by a high percentage of alloying elements. The most common high-alloy steel is stainless steel, which contains at least 12 percent chromium. Stainless steel is generally split into three basic types: martensitic, ferritic, and austenitic. Martensitic steels contain the least amount of chromium, have a high hardenability, and are typically used for cutlery. Ferritic steels contains 12 to 27 percent chromium and are often used in automobiles and industrial equipment. Austenitic steels contain high levels of nickel, carbon, manganese, or nitrogen and are often used to store corrosive liquids and mining, chemical, or pharmacy equipment.

2. Low-Alloy Steel:-
Low-alloy steels have a much lower percentage of alloying elements, usually 1 to 5 percent. These steels have very different strengths and uses depending on the chosen alloy. Large diameter flanges manufacturers typically choose alloys for a specific mechanical property. The variety of potential alloys makes low-alloy steel useful for a variety of projects, including seamless rolled ring forging and studding outlet manufacturing.

While there are a lot of different alloying elements that can be used to improve the mechanical properties of steel, certain combinations are used often and there are different types of alloy steel that are more popular than others.

High strength low alloy (HSLA) steel is an alloy that provides greater atmospheric corrosion resistance and high strength. There are six different classifications of HSLA steel, with varying alloying elements used. Typically, vanadium, niobium, titanium, and copper are used to provide the increased strength, and copper, chromium, phosphorus, and silicon are used to increase corrosion resistance. Due to the high strength of HSLA steels, they can often be harder to form, in some cases calcium or zirconium are added to improve formability. Chrome moly is another common alloy steel. This material is an alloy of chromium and molybdenum, which improves hardenability, increase strength, high temperature resistance, corrosion, and oxidation resistance.

Applications of Alloy Steel Nuts and Bolts

• Alloy Steel Bolts and nuts for water projects, water pipelines, sewage water treatment plants,desalination plants and waste water treatment plants.
• Bolts and nuts are used in several applications, with a primary function to hold things or components together. A bolt, also known as a screw, does not always have to be used together with a nut; however, a nut is always used together with a bolt.
• The purpose of inserting bolts into other materials is to bind that material with another object. For example if one material is required to be bonded with another, a bolt could be run through these two materials and a nut on the other side could be used to secure the materials together tightly.
• Nuts and bolts serve as the fundamental components in several construction projects as they provide strong bonds that do not break even under great amounts of pressure.
• For companies involved in Equipment Manufacturing, Mining, Oil Refineries, Chemical manufacturing, Steel and Aluminum Manufacturing, Utilities and Transportation, and Industrial Construction.

Advantages of Alloy Steel Nuts and Bolts. Difference Between Alloy Steel Bolts and Welding/Riveting

• Light weight
• Flexibility
• Toughness
• Chemically Inert
• Resistance to Abrasion
• Smooth surface
• Environmental stress crack resistance
• Corrosion resistance
• Frost & rodent resistance
• Hygienic safety
• Easy & quick installation
• Non-magnetic
• Easy Availability
• Inexpensive
• Alloy Steel Bolts Have an Excellent Life Cycle
• Better Visual appeal
• Easier Replacement of Parts
• In some important cases, some anti-loose measures will be taken to ensure the reliability of the nut locking. The use of lock nut is one of the anti-loose measures. The working principle of the nut is self-locking by the friction between the nut and the bolt.
•  They are easily disassembled, as opposed to something like riveting or welding, which requires cutting.
• They can be designed to take tension loads, unlike riveting (by tightening the bolt/nut to develop a preload, you reduce the effects of fatigue due to cyclic loading, which you can’t do with a rivet; plus, rivets can easily pull through a hole when loaded in tension).
• Welds require heating a metal, which can change the properties in the heat-affected zone, and can also create thermal stresses. Bolts avoid this problem. You’re also not likely to start a fire (welds) or breathe toxic fumes (welds and adhesive joints) when you’re installing a bolt.
• Bolted joints aren’t particularly sensitive to the condition of the parent material. With welds and adhesive joints, the parent material needs to be clean, free of oils, etc (and obviously, it has to be metal to weld).
• You can put a bolt in a blind hole (one that doesn’t go all the way through the material); you can’t use a rivet.
• Bolts are easy. Welding takes a lot of skill and a lot of time, particularly if you’re going to inspect the weld for flaws after it’s completed. But just about everybody has used a wrench.
• Bolts offer much better joint quality than a screw, mostly because the threads are more tightly controlled.

Disadvantages of Alloy Steel Nuts and Bolts

• Difficulty of Refastening
• Forced Precision
• The working principle of the nut is self-locking by the friction between the nut and the bolt. However, the reliability of this self-locking in dynamic loads is reduced.
• They require access to both sides of the joint (although this can be overcome using studs or special bolts like Hi-Loks). Welding, adhesive joints, and some types of riveting can be done with access to only one side of the joint.
• They can become loose over time as the nut backs off (this can be addressed to some extent by using the proper preload and thread-locking features) or as the material creeps. Welding and adhesive joints don’t have this problem.
• They require holes, which introduce stress concentrations and more failure modes; drilling the holes may create cracks which will grow over time to cause failure. Welding and adhesive joints don’t require holes. Also, welds and adhesive joints are continuous, so they don’t concentrate load like a bolt does.
• Preload can be tough to measure accurately – it depends on the method of tightening, the friction between the threads of the bolt and the nut, etc.
• Complexity. A bolted joint adds to a part count – a bolt, a nut, washers, thread lubricant, thread locking compound. And the bolts, nuts, and washers come in specific sizes with specific threads, with specific hole sizes and tolerances, for specific applications – if you need a high quality joint, you’ve got to keep track of all that and make sure the right bolt is used in the right place and in the right way.
• Damage to a threaded hole is tough to replace – you can drill it out and rethread, but using a larger bolt might change your load distribution. To avoid that, you can use an insert in the parent material – basically a tube that is threaded on the outside and on the inside, but that adds complexity. (Of course, all this is related to the advantage of actually being able to disassemble and reassemble a bolted joint, so you might not actually call it a disadvantage compared to other fastening processes.)
• Corrosion between a bolt and the parent material should be considered. This may not be a problem with welding and adhesive joints if the parent materials being welded are compatible.
• Bolted joints require a gasket to seal a joint. A weld (if done properly) will be leak-proof.
• Bolted joints aren’t so easy after all – I know of robots that weld, but the manual dexterity needed to install a bolt still requires a human touch. (Although if you have a job installing bolts, you might consider this an advantage!)