Alloy Steel Grades & Specifications

by AMC

Posted on February 27, 2023 at 12:40 PM

Alloy Steel Grades

What is Alloy Steel?

Alloy steel is one of the most versatile steels available in the world. With a wide range of elemental properties and specifications, it is the superior choice for mission-critical applications that demand superior performance under high pressure environments. From oil and gas exploration to aerospace and defense, alloy steel is a key component in many exotic and demanding applications.

Alloy steel is the perfect combination of strength and versatility. It is made by combining carbon steel with one or several alloying elements, such as manganese, silicon, nickel, titanium, copper, chromium, and aluminum. These metals are added to produce specific properties that are not found in regular carbon steel. The elements are added in varying proportions or combinations, making the material take on different aspects such as increased hardness, corrosion resistance, strength, improved formability (ductility), and the weldability can also change.

The most important and desired changes in alloy steel are:

Increased hardenability is achieved by adding alloying elements like manganese, nickel, and chromium. This property is important for applications that require increased strength and durability, such as manufacturing heavy machinery and equipment. It is also crucial in applications where the material will be subjected to high levels of stress or wear and tear, such as oil and gas drilling equipment.

Increased corrosion resistance is achieved by adding alloying elements like copper, silicon, and aluminum. This property is important for applications that will be exposed to corrosive environments, such as offshore oil rigs, chemical processing plants, and marine equipment. The added elements create a protective barrier that prevents the material from corroding and degrading over time.

Another important property of alloy steel is its ability to retain its hardness and strength under high pressure environments. This property is crucial in mission-critical applications where failure is not an option. Alloy steel is the go-to choice for applications that demand superior performance under high pressure and high-stress environments.

Alloy Steel - Alloying Elements & Their Effects

Here's a guide to the most common alloying elements and their effects on material properties:

  1. Manganese - Increases strength and hardenability while decreasing brittleness.
  2. Nickel - Improves toughness and corrosion resistance.
  3. Chromium - Increases corrosion and heat resistance, and creates a hard, wear-resistant surface.
  4. Molybdenum - Increases strength, hardenability, and corrosion resistance.
  5. Vanadium - Increases strength, hardenability, and wear resistance.
  6. Silicon - Improves toughness and corrosion resistance.
  7. Copper - Increases corrosion resistance and electrical conductivity.
  8. Aluminum - Improves strength and corrosion resistance.
By selecting the right combination of alloying elements, you can achieve increased strength, corrosion resistance, and other desirable properties. For example, if you need a material that is highly resistant to corrosion, you might select an alloy steel with high levels of chromium and nickel. If you need a material that is highly wear-resistant, you might select an alloy steel with high levels of chromium and vanadium.

Alloy Steel Grades & Specifications

Chrome Molybdenum Steel
Overview We supply chromium molybdenum steel, chromium molybdenum nickel steel and chromium molybdenum tungsten steel to various engineering, power generation, oil & gas, petrochemical, welded tube fitting and nuclear industries. Our facilities enable us to cater to the specific requirement of the customers.
Application Boiler Pressure Vessels, Tube & Pipe fittings, refinery equipments for elevated temperature service.
Grades ASTM A387 Grade 11/ 12/ 22/ 5/ 9/ 91, EN 10028 -2 / DIN 17175 , ASTM A204 / A302, SAE 4130 / 4140 / 8620, EN 19 / EN 24 / EN 36
Supply Condition Normalized & Tempered / Annealed / Normalized.
Abrasion / Wear Resistant Steel
Overview The hardened boron steel is extremely resistant to abrasive wear and high surface pressure. The excellent mechanical properties of boron steels are achieved through heat treatment. It also offers good weldability with cold bending properties.
Application Wherever demands are imposed on abrasion resistance e.g. dump trucks, excavators, loaders, chutes, conveyors, feeders etc.
Grades 500HB / 400HB / 300HB / 200HB
Supply Condition Quenched & Tempered(If required)
Quenched and Tempered Steel
Overview Quenched and tempered fine grained steel is used for welded steel structures having demands of low weight and high load.
Application Pressure vessels, penstocks, bridges, transport vehicles, cranes, frameworks, conveying plants etc.
Grades EN 10025-6-S500 / S550 / S620 / S690
Supply Condition Quenched and Tempered
High Tensile Steel
Overview The structural steel with high tensile properties is used for general construction so as to reduce the section weight.
Application Fabrication, Engineering construction
Grades EN 10025-2-S355 / S420 / S460. IS 2062 E350/ E410 / E450
Supply Condition Normalised / Normalised Rolled
Corrosion Resistant Steel
Overview It exhibits increased resistance to atmospheric corrosion compared to unalloyed steel as it forms and regenerates a protective layer under the influence of the weather.
Application Steel frame structures, bridges, tanks, containers, exhaust systems etc.
Grades ASTM A588 / A242. IRSM - 41
Supply Condition Normalised Rolled / Normalised
Tool Steel
Overview Hot & Cold work tool steels as per the Standard (A681) as well as customer requirement is produced based on design application, service condition and desired properties.
Application Tools, Dies & Fixtures
Grades A2 / H11 / O1 / D2 / D3/ S-13 / HCHCR
Supply Condition Spherodise Annealed
Pressure Vessel Steels
Overview This Carbon steel plates are intended for welded pressure vessels, iron sturctures where improve notch toughness is important.
Application Pressure Vessel Boiler, Tube Fittings
Grades ASTM A516 / A515. ASTM A537 CL.1 & CL.2
Supply Condition Normalised / Normalise Rolled/ Quenched & Tempered
Other Alloy Steels
Overview The various special steels having diverse applications are produced as per customer requirement.
Application Automobile, Valves, Bearing, Extruders, Springs
Grades 16/20MnCr5,EN52, EN1A,EN41, EN31,56Si7,42CrMo4
Supply Condition As Rolled / Annealed / Normalised / Quenched & Tempered


Alloy and special steels are an essential component of modern manufacturing and construction industries. These materials offer a wide range of properties that cannot be found in traditional carbon steels, making them invaluable in applications that require high strength, corrosion resistance, and heat resistance. The different grades and specifications available make it possible to find the perfect material for any project, no matter how specialized the requirements may be.

At Amardeep Steel we offer a diverse range of alloy and special steels that are designed to meet the needs of our customers. Our products are known for their superior quality, durability, and performance, making them the perfect choice for mission-critical applications that demand the best. With our commitment to excellence and our extensive experience in the industry, we are confident that we can provide the right material for any project. Contact us today to learn more about our products and services.

Alloy Steel
Alloy Steel - Properties, Types, Uses & Grades

Alloy steel is a type of steel that is mixed with other elements like molybdenum, manganese, nickel, chromium, vanadium, silicon, and boron.

What is Alloy Steel
What is Alloy Steel | Types, Properties, Applications & Grades

Alloy steel is made by combining a number of different elements, such as silicon, chromium, molybdenum, boron, vanadium, nickel, aluminum, etc.

Alloy Steel vs. Stainless Steel
Alloy Steel vs Carbon Steel

Alloy steel is a type of steel that is made by combining two or more different metals or elements to improve its properties. The specific combination of metals.