• 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.
  • 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.
Alloy Steel Nuts and Bolts Manufacturer, Wholesaler, Dealer, Supplier and Distributor In India and Abroad
  • As one of the largest manufacturer of Alloy Steel Nuts and Bolts, we have over 6000 tons in stock

  • Alloy Steel Nuts and Bolts Available at around Rs. 300/KG for Sale in India.

  • Our Annual Sales Volume for Alloy Steel Nuts and Bolts is Over 25,000 tons in India and Overseas.

  • Alloy Steel Pipes and Tubes, are Sold with Complete Range of Related Pipe Fittings and Flanges

  • On-Time Delivery with Quality Assurance and Price Guarantee for Alloy Steel Nuts and Bolts

  • Email Us on sales@metallicametals.com | Call Us On +918928722715.

  • Buy unique variety of top quality Alloy Steel Bolts and Nuts at discounted price, dimensions range from M3 to M100.

  • 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 fast deliveries to your factory directly from our warehouse or our principal suppliers.

Types of Alloy Steel Nuts and Bolts

Alloy Steel Hex Head Bolt ASTM A193 Alloy Steel Hex Head Bolt
Alloy Steel Hex Head Bolts
Alloy Steel Square Bolt Alloy Steel Square Bolts
ASTM A193 Alloy Steel Square Bolt
Alloy Steel U Bolt Alloy Steel U Bolts
Chrome Moly U Bolt
ASTM A193 Alloy Steel U Bolt
Alloy Steel Eye Bolt Alloy Steel Eye Bolt
Chrome Moly Eye Bolts
ASTM A193 Alloy Steel Eye Bolt
Alloy Steel T Bolt Alloy Steel T Bolt
Chrome Moly T Bolts
ASTM A193 Alloy Steel T Bolt
Alloy Steel Hex Bolt Alloy Steel Hex Bolt
Chrome Moly Hex Bolts
ASTM A193 B6 Alloy Steel Hex Bolt
Alloy Steel Lag Bolt Alloy Steel Lag Bolts
AS Lag Bolt
ASTM A193 Alloy Steel Lag Bolt
Alloy Steel Counter sunk Bolt Alloy Steel Counter sunk Bolt
Chrome Moly Counter sunk Bolts
ASTM A193 Counter sunk Bolt
Alloy Steel Hex Head Nut Alloy Steel Hex Head Nut
Chrome Moly Hex Head Nut
ASTM A193 B6 Alloy Steel Hex Head Nut
Alloy Steel Square Nut Alloy Steel Square Nut
Chrome Moly Square Nuts
ASTM A193 Alloy Steel Square Nut
Alloy Steel Lock Nut Alloy Steel Lock Nuts
AS Lock Nut
ASTM A193 Alloy Steel Lock Nut
Alloy Steel Eye Nut Alloy Steel Eye Nuts
AS Eye Nut
ASTM A193 Alloy Steel Eye Nut
Alloy Steel wing Nut Alloy Steel wing Nut
Chrome Moly wing Nuts
ASTM A193 Alloy Steel wing Nut
Alloy Steel T Nut Alloy Steel T Nuts
ASTM A193 Alloy Steel T Nut
Alloy Steel Panel Nut Alloy Steel Panel Nuts
AS Panel Nut
ASTM A193 Alloy Steel Panel Nut
Alloy Steel Coupling Nut Alloy Steel Coupling Nuts
AS Coupling Nut
ASTM A193 Alloy Steel Coupling Nut
Alloy Steel Dome Nut Alloy Steel Dome Nut
AS Dome Nuts
ASTM A193 Alloy Steel Dome Nut
Alloy Steel Acorn Nut Alloy Steel Acorn Nut
Chrome Moly Acorn Nuts
ASTM A193 Alloy Steel Acorn Nut

Material Specification of Alloy Steel Bolts and Nuts

Grade Material
B7 Alloy steel, AISI 4140/4142 quenched and tempered
B16 Alloy steel, Chromium-molybdenum-vanadium heat treated
B8 Class 1 Stainless steel, AISI 304, carbide solution treated
B8M Class 1 Stainless steel, AISI 316, carbide solution treated
B8 Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened
B8M Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened
B7, B8 and B8M are the most commonly used grades. The properties tables below provide more information on the differences between the grades.

Stock Range of Alloy Steel Nuts and Bolts

Product Alloy Steel Nuts and Bolts
Grades B7, B16, B8 (Class 1 & 2), B8M (Class 1 & 2)
Standards ASTM A193, ASTM A194
Size Range M3 – M56 | 3/6″ to 2″. Can be made customized
Length Upto 5m
Application Water projects, water pipelines, sewage water treatment plants, desalination plants and waste water treatment plants
Finish Bright polished and cleaned, Plain, black, zinc plated (Cr,3+), zinc plated(Cr,6+), hot dipped galvanized, dacromet, nickel plated, cadmium plated, etc.
Packing In Bulk: Canton/pallet, Small Boxes/carton/ pallet, or customer request
Bolt Drives Allen or socket drive, hex head drive, Torx drive and square drives.
Threads Bolts can come fully or partially threaded depending on the bolt type. International Organization for Standardization (ISO) standards for threads are: length is twice the diameter of the bolt plus 1/2 inch. If you are looking for fully threaded bolts please call direct at 800-872-5557
Tests Performed Hardness tests, proof of load tests, and cone proof load tests shall be made to all nuts to meet the requirements specified.
Test Certificate Manufacturer Test Certificate as per EN 10204 / 3.1

What are Alloy Steel Bolts and Nuts?

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).

What are the 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.

What are the 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.

What are the 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!)

Manufacturing Process of Alloy Steel Nuts and Bolts?

Hot Gorging Method is used for Alloy steel nuts and bolts. 100% machining on CNC machines for better quality and productivity

Types of Alloy Steel

There are 2 major types of alloy steel. 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. 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.

ALLOY SPECIFICATION MAXIMUM USEFUL TEMPERATURE
Carbon-steel SA178, SA192, 850°
SA210, SA106,
SA515, SA516
Carbon-1/2 SA209 900°
Molybdenum
1 1/4 Chromium- SA213 T-11 1025°
1/2 Molybdenum SA335 P-11
2 1/4 Chromium- SA213 T-22 1075°
1 Molybdenum SA335 P-22
18 Chromium- SA213 TP304(H), 1500°
10 Nickel 321(H), 347(H)

Chemical Composition Of Alloy Steel Bolts and Nuts

Element B7 B8 B8M
Carbon 0.37 – 0.49% 0.08% max 0.08% max
Manganese 0.65 – 1.10% 2.00% max 2.00% max
Phosphorus, max 0.04% 0.05% 0.05%
Sulfur, max 0.04% 0.03% 0.03%
Silicon 0.15 – 0.35% 1.00% max 1.00% max
Chromium 0.75 – 1.20% 18.0 – 20.0% 16.0 – 18.0%
Nickel 8.0 – 11.0% 10.0 – 14.0%
Molybdenum 0.15 – 0.25% 2.00 – 3.00%

Standards & Codes Specification

Commonly Used Standards and Codes
Sr. No Code Standards
1 ANSI B16.11 Pipe Flanges and Flanged Fittings.
2 ANSI B 16.5 Flanges
3 MSS SP-44 Large Dia Flanges.
4 ASME B 16.47 (SERIES A & B) Large Dia Flanges.
5 DIN Flanges
6 BS 4504 Flanges
7 ASTM A105 Forging, Carbon Steel for piping components
8 ASTM A182 Forged & Rolled Alloy Steel Pipe Flanges. Forged Fittings & Valves and parts for high temperature services.
9 ASTM A 350 Carbon & Low Alloy Steel, requiring notch toughness testing for piping components
10 ASTM A 515 Standard specifications for Pressure Vessel-Plates Carbon Steel for intermediate and higher temperature services.
11 ASTM A 516 Standard Specifications for Pressure Vessel Plates Carbon steel for Moderate and lower temperature services.
12 ASTM A 517 Standard specifications for Pressure Vessel Plates Alloy Steel High Strength Quenched & Tempered.
13 ASTM A 333 Standard specification for Seamless & Welded Steel Pipe for Low Temperature Services.
14 ASTM A 335 Standard Specification for Seamless Ferritic Alloy steels pipe for High Temperature Services.
15 IS 2002 Specification for steels Plates for Boilers.
16 IS 2062 Specification for weldable structure steel.
17 IS 1239 Mild Steel Tubes Tubular & other wrought steel fittings specification.
18 IS 3589 Mild Steel Tubes Tubular & other wrought steel fittings specification.

Effects of Alloying Elements on Steel

•Manganese – strength and hardness; decreases ductility and weldability; effects hardenability of steel.
•Phosphorus – increases strength and hardness and decreases ductility and notch impact toughness of steel.
•Sulfur decreases ductility and notch impact toughness Weldability decreases. Found in the form of sulfide inclusions.
•Silicon – one of the principal deoxidizers used in steel making. In low-carbon steels, silicon is generally detrimental to surface quality.
•Copper – detrimental to hot-working steels; beneficial to corrosion resistance (Cu>0.20%).
•Nickel – ferrite strengthener; increases the hardenability and impact strength of steels.
•Molybdenum –  increases the hardenability; enhances the creep resistance of low-alloy steels.

What are the Steel Pipe Sizes?

Steel pipe sizes

Pipe size is quoted as a “Nominal Pipe Size” or NPS. The origin of the NPS numbers for smaller pipes (< NPS 12) is different to the origin for larger diameter pipes. However, all pipes of a specific NPS number have the same external or outer diameter (OD). The internal diameter will vary depending on the wall thickness of the metal. The reason for this is so that the same structural supports can be used for all piping of a specific NPS number regardless of the wall thickness.

Schedules

Steel pipe schedules are a way to describe the wall thickness of the pipe. This is a critical parameter as it is directly related to the strength of the pipe and the suitability for specific applications. A pipe schedule is a dimensionless number and is calculated based on the design formula for wall thickness, given the design pressure and allowable stress.

Examples of schedule numbers are as follows: 5, 5S, 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, STD, XS, and XXS—with the most common being schedules 40 and 80. As the schedule number increases, the wall thickness of the pipe increases. The schedule number of a pipe therefore defines the internal diameter, as the OD is fixed by the NPS number.

Over 10000 Tons in Stock for Alloy Steel Nuts and Bolts!

ISMT & Jindal Steel Pipes Dealers, Original MTR's Provided with All Materials

As one of the biggest alloy steel nuts and bolts stockholder and supplier in India, Metallica carries inventory of over 10,000 tons in its warehouses in Mumbai, Maharashtra India. We sell our alloy steel forged products throughout India, and to international clients. We can supply our alloy steel nuts and bolts not only in industry-standard lengths and diameters, but also in custom length and diameters.

How are Steel Pipes Certified?

Certification of Steel Pipes

Manufacturers issue a Material Test Report or Mill Test Report to validate that the product meets the chemical analysis and mechanical properties specification. The MTR will contain all relevant data to the product and will accompany the product through its lifecycle.

The following are typical parameters that may be recorded on an MTR:

  • Chemical composition including carbon content, alloys, and sulfur
  • Material size, weight, identification, and grade
  • Material heat number, which ties back to the processing batch
  • Mechanical properties like tensile strength, yield strength, and elongation

At Metallica, we will Provide you with Original MTR’s for all Alloy Steel Pipe Products! We will Send Our Test Certificates, along with Quotation