Alloy Steel Pipe And Pipe Fittings Manufacturer & Supplier - Om Steel

07 Jul.,2025

 

Alloy Steel Pipe And Pipe Fittings Manufacturer & Supplier - Om Steel

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Alloy Steel Pipe and Pipe Fittings

Alloy steel pipes and pipe fittings are widely used in various industries due to their excellent strength, durability, and resistance to high temperatures and pressure. Om Steel is a trusted manufacturer and supplier of high-quality alloy steel pipes and pipe fittings that are designed to meet the diverse needs of our clients.

Our alloy steel pipes and pipe fittings come in a wide range of sizes and grades, making them suitable for use in various applications. We offer seamless and welded pipes and a variety of fittings, including elbows, tees, reducers, and flanges.

One of the key features of our alloy steel pipes and pipe fittings is their excellent resistance to corrosion and wear and tear, ensuring long-lasting performance in harsh environments. Our products are also highly ductile, making them easy to fabricate and install.

At Om Steel, we use the latest technology and manufacturing techniques to ensure that our products meet the highest quality standards. Our team of experts is always available to provide you with the necessary guidance and support to ensure that you get the right product for your specific application.

Low vs High Alloy Steel in Piping

Low Alloy Steels

Low alloy steels are those that contain less than 5% of other elements besides iron and carbon. These steels have a low carbon content, typically around 0.05% to 0.3%, which makes them more ductile and easier to weld than high carbon steels. Low alloy steels also have good machinability, formability, and toughness.

Another advantage of low alloy steels is their fine grain size, which improves their mechanical properties such as tensile strength, yield strength, and impact resistance. However, they may not be suitable for high temperature or pressure applications due to their lower strength compared to high alloy steels.

High Alloy Steels

High alloy steels contain more than 5% of other elements besides iron and carbon. These elements can include chromium, nickel, molybdenum, vanadium, tungsten, cobalt or other metals that enhance the properties of the steel such as corrosion resistance or hardness.

High alloy steels also have a higher carbon content than low alloy steels, typically around 0.3% to 1.5%, which makes them harder and more wear-resistant. However, this also makes them more brittle and difficult to weld compared to low alloy steels.

Types of Alloy Steel Pipe Fittings, Flanges, and Elbows

Alloy steel pipe fittings are widely used in various industries such as oil and gas, chemical, petrochemical, power generation, and many more. These fittings are designed to connect pipes or tubes together to ensure a smooth flow of fluids or gasses. There are different types of alloy steel pipe fittings available in the market that cater to specific needs.

Elbows

Elbows are one of the most commonly used alloy steel pipe fittings. They are used to change the direction of flow in a piping system. Elbows come in different angles such as 45 degrees, 90 degrees, and 180 degrees. The most commonly used elbow is the 90-degree elbow. It is also known as a “steel elbow” or “elbow fitting”. The seamless elbow is preferred over welded elbows because they provide better strength and leak-proof connections.

Reducing Elbows

Reducing elbows are used when there is a need to connect pipes or tubes with different diameters. These elbows have one end larger than the other end. Reducing elbows come in different angles such as 45 degrees and 90 degrees.

Tees

Tees are another type of alloy steel pipe fittings that are widely used in piping systems. They are mainly used to combine or split fluid flow into two directions at an angle of 90 degrees. Tees come in different types such as straight tees, reducing tees, lateral tees, etc.

Lateral Tee

A lateral tee is a type of tee that has an outlet at a 45-degree angle from the mainline direction. This type of tee allows for easy installation of instruments or valves on the lateral branch.

Flanges

Flanges are generally used to connect pipes or tubes with pumps, valves, and other equipment that require frequent maintenance or replacement. Flanges provide easy access for inspection or cleaning of the piping system. There are different types of flanges available such as slip-on flanges, weld-neck flanges, blind flanges, and socket-weld flanges.

Slip-On Flange

A slip-on flange is a type of flange that slips over the pipe or tube and is then welded in place. This type of flange is easy to install and remove.

Weld-Neck Flange

A weld-neck flange is a type of flange that has a long tapered neck that is butt-welded to the pipe or tube. This type of flange provides better strength and leak-proof connections.

Blind Flange

A blind flange is a type of flange that seals off the end of a pipe or tube. It is used when there is no need for frequent maintenance or inspection.

Socket-Weld Flange

A socket-weld flange is a type of flange that has a socket for welding onto the pipe or tube. This type of flange provides good flow characteristics and ease of installation.

Standard Specifications for Alloy Steel Pipe Fittings

ASTM A234 WPB is a standard specification for piping fittings of wrought carbon steel and alloy steel. These fittings are intended for moderate and high-temperature services, and they are commonly used in pressure piping systems.

ASTM A234 WPB is the most common material grade used in manufacturing pipe fittings. It has excellent weldability and is easy to fabricate. It also has good mechanical properties, including tensile strength, yield strength, and hardness.

ASME A234 WPB vs. ASTM A234 WPB

ASME (American Society of Mechanical Engineers) and ASTM (American Society for Testing and Materials) are two different organizations that develop standards for materials, products, systems, and services. ASME develops codes and standards for mechanical engineering practices while ASTM develops standards for materials.

However, many people use the terms ASME A234 WPB and ASTM A234 WPB interchangeably because they refer to the same standard specification.

ASTM A234 Gr WPB

ASTM A234 Gr WPB stands for Grade Wrought Pipe Butt-welding Fittings made from Carbon Steel. This grade is commonly used in piping systems that require low-temperature service or high-pressure applications.

ASTM A234 WP

ASTM A234 WP stands for Wrought Carbon Steel Alloy Steel Piping Fittings. This specification covers both seamless and welded carbon steel alloy steel pipe fittings of seamless construction.

A234WP91 Alloy Steel Pipe

A234WP91 is a type of alloy steel that contains chromium, molybdenum, vanadium, niobium, iron, carbon, manganese, phosphorus, sulfur, silicon as its major constituents. This material offers excellent resistance to corrosion at high temperatures making it suitable for use in power plants where high temperature steam conditions prevail.

ASTM A234 WP1 & ASTM A 234 WP11

ASTM A234 WP1 and ASTM A 234 WP11 are two different grades of alloy steel pipe fittings that are commonly used in high-temperature service applications. These fittings have excellent strength, toughness, and corrosion resistance properties.

ASTM A234 Fittings

ASTM A234 fittings are manufactured using the forging process. This process involves heating the material to a specific temperature, then shaping it into the desired shape using a hammer or press. These fittings come in various shapes and sizes such as elbow, tee, reducer, cap, etc. They are also available in different types such as seamless and welded fittings.

ASTM A234 Socket Weld Fittings

Socket weld pipe fittings are commonly used in small diameter piping systems where welding is not practical due to space constraints. These fittings have a socket-like structure that allows them to be easily inserted into the pipe end.

A234 Gr WPB

A234 Gr WPB is a common grade of carbon steel pipe fittings that is widely used in pressure piping systems. It has good mechanical properties and is easy to fabricate.

A234 WP11 Pipe Fittings

A234 WP11 Pipe Fittings are made from low-alloy steel containing chromium and molybdenum. These materials offer excellent resistance to high-temperature environments making them suitable for use in power plants and other industrial applications.

High-Quality ASTM A234 WP11

High-quality ASTM A234 WP11 pipe fittings are essential for ensuring the safety and reliability of piping systems operating under high-pressure conditions. These fittings must meet stringent quality standards to ensure they can withstand extreme temperatures and pressures without failure.

ASTM A234 Grade WP11

ASTM A234 Grade WP11 refers to low-alloy steel pipe fittings made from chromium-molybdenum alloy steels. These materials offer excellent corrosion resistance at high temperatures making them ideal for use in power plants, refineries, chemical plants, and other industrial applications.

ASTM A234 Gr

ASTM A234 Gr refers to the grade of carbon steel or alloy steel used in manufacturing pipe fittings. This specification covers both seamless and welded carbon steel and alloy steel pipe fittings.

A234 WPB

A234 WPB is a common material grade used in manufacturing pipe fittings. It has excellent weldability and is easy to fabricate. It also has good mechanical properties, including tensile strength, yield strength, and hardness.

A234 Fittings

A234 fittings are commonly used in piping systems that require moderate to high-temperature service. These fittings come in various shapes and sizes such as elbow, tee, reducer, cap, etc. They are also available in different types such as seamless and welded fittings.

A234 WP11 Pipe Fittings Manufacturers

There are many manufacturers of A234 WP11 pipe fittings worldwide. However, it is essential to choose a reputable manufacturer that can provide high-quality products that meet your specific requirements.

Buttweld Fittings

Buttweld fittings are commonly used in piping systems where welding is practical due to space constraints. These fittings have a beveled end that allows them to be easily inserted into the pipe end for welding.

Socket Weld Pipe Fittings Sizes

Socket weld pipe fitting sizes range from 1/8″ to 4″. However, larger sizes may be available upon request from the manufacturer.

Alloy steel Pipe and Pipe Fittings

Specifications

Specifications ASTM A387 / ASME SA387 Thickness 1mm-300mm Width mm, mm, mm, mm, mm, mm, mm, mm, mm etc Length mm, mm, mm, mm, mm, mm, mm etc Surface 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching Manufacturer and Supplier Finish Hot rolled plate (HR), Cold rolled sheet (CR)

Alloy steel Pipe

ASTM grades

Grades C Mn P S SI Cr Mo ASTM A387 Grade 5 0.15 max 0.3 – 0.6 0.035 0.03 0.5 max 4.00 – 6.00 0.45 – 0.65 ASTM A387 Grade 9 0.15 max 0.30 – 0.6 0.03 0.03 1.0 max 8.0 – 10.0 0.9 – 1.1 ASTM A387 Grade 11 0.05 – 0.17 0.4 – 0.65 0.035 0.035 0.5 – 0.80 1.0 – 1.5 0.45 – 0.65 ASTM A387 Grade 12 0.05 – 0.17 0.4 – 0.65 0.035 0.035 0.15 – 0.4 0.8 – 1.15 0.45 – 0.6 ASTM A387 Grade 22 0.05 – 0.15 0.3 – 0.6 0.035 0.035 0.5 max 2.0 – 2.5 0.9 – 1.1

Alloy Steel Pipes

Outside Diameter & Tolerance

Dimension Thickness 0.025″ 4″ 0.75″ 0.032″ 3.5″ 0.875″ 0.036″ 0.109″ 1″ 0.04″ 0.125″ 1.125″ 0.05″ 0.16″ 1.25″ 0.063″ 0.19″ 1.5″ 0.071″ 0.25″ 1.75″ 0.08″ 0.″ 2″ 0.09″ 0.375″ 2.5″ 0.095″ 0.5″ 3″ 0.1″ 0.625″ –

Alloy Steel Pipes

Wall thickness

Size (in inches) Size (in mm) .125″ 3.18mm .134″ 3.40mm .156″ 3.96mm .187″ 4.75mm .250″ 6.35mm .312″ 7.92mm .375″ 9.53mm .500″ 12.7mm .600″ 15.9mm .750″ 19.1mm .875″ 22.2mm 1″ 25.4mm 1.125″ 28.6mm 1.250″ 31.8mm 1.500″ 38.1mm 1.750″ 44.5mm 2″ 50.8mm 2.500″ 63.5mm 3″ 76.2mm

Application Industry

Serving Diverse Sectors with Precision & Performance

Om Steel supplies premium steel and alloy products to a wide range of industries, ensuring strength, durability, and performance in every application. From construction, oil & gas, and automotive to power plants, shipbuilding, and chemical processing — our materials meet the demands of critical operations. Trusted by industry leaders, we deliver solutions that stand up to the toughest challenges.

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Alloy Steel vs. Stainless Steel: A Comprehensive Guide to Choosing ...

Alloy Steel Overview

Alloy steel is a steel type containing more than one alloying element. Whenever you add each element often introduces new characteristics or improves certain material properties. Generally, all basic steel has iron content and a small percentage of carbon. Chromium is a common alloying element that manufacturers add to other elements to enhance corrosion-resistance properties.

Other common elements suitable with alloy steel are vanadium, nickel, manganese, molybdenum, titanium, and tungsten. The specific elements added to the alloy steel often determine its properties. For instance, manganese improves ductility, wear resistance, and alloy steel’s hardenability. On the other hand, chromium enhances alloy steel’s toughness, hardness, and resistance to wear.

Types of Alloy Steel

Here are the categories under which alloy steel types are classified:

  • High-Alloy Steels

These alloy steels usually contain a high amount (more than 5% of the total composition) of one or more alloying elements for excellent toughness, hardness, and strength. Common alloying elements for this alloy steel category include manganese, chromium, vanadium, nickel, and molybdenum. Stainless steel is a perfect example of high-alloy steel, containing a minimum of 12% chromium, depending on its grade.

  • Low-Alloy Steels

Low-alloy steels contain a lower portion of one or more alloying elements (maximum of 5% of the total composition), offering improved toughness, strength, hardness, or other qualities. Typical examples of alloying elements in this category include tungsten, molybdenum, copper, chromium, manganese, boron, and nickel. Further, typical applications for low-alloy steels include mining and construction equipment due to their high requirement for good strength-to-weight ratios properties.

  • Maraging Steels

These steels are famous for their superior toughness and strength. Manufacturers find a use for these steels in applications that require high-strength properties, including military and aerospace applications.

  • Tool Steels

Tool steels are commonly known as highly alloyed steel suitable for tool and die applications in particular. Tool steels can resist wear and hardness even when exposed to high temperatures.

Advantages of Alloy Steel over Stainless Steel

Alloy steels offer certain benefits over stainless steel, making it a material worth considering for various applications. Here are some of these advantages:

  • It offers an excellent strength-to-weight ratio.
  • Alloy steel exhibit resistance to higher temperature.
  • Alloy steels allow higher machinability, allowing their high versatility.
  • It is a cost-effective option.

Stainless Steel Overview

Stainless steel is an alloyed steel with a minimum of 10.5% chromium. The chromium element offers stainless steel greater corrosion resistance, making it compatible with extensive applications ranging from medical equipment to cookware. In addition, it is a common choice for consumers and businesses due to its unique features. However, it would help to note that stainless steel has different grades with varying sets of qualities.

Common Types of Stainless Steel

Although there are thousands of stainless steel grades, they can be successfully grouped into the following categories:

  • Austenitic Stainless Steels

The austenitic steels usually contain 8-20% nickel and 17-25% chromium at minimal (the basic stainless 304 contains 18% chromium and 8% nickel). These steel grades are usually non-magnetic, and manufacturers use them in food processing equipment and chemical plants due to their high resistance to rust, stain, and corrosion after exposure to water.

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Austenitic grades offer excellent corrosion resistance, toughness, ductility, weldability, and high formability. This group’s good examples of stainless steel include 253, 304/304L, and 316/316L.

  • Martensitic Stainless Steels

This category of stainless steel contains between 14 -18% chromium and balanced levels of carbon within the 0.2 and 2% range. You can temper and harden martensitic stainless steel like carbon steel. Likewise, they offer reduced ductility and low weldability. Typical examples are 431, 420C, and 431 stainless steel grades.

  • Ferritic Stainless Steels

The ferritic group contains a portion of chromium, typically between 11- 27% and less or no nickel. This group’s steel is less corrosion-resistant than austenitic stainless steel due to its high amount of chromium. They share certain qualities with iron and show improved mechanical properties at high temperatures, and you can strengthen these steels through annealing.

However, ferritic stainless steels lack toughness which reduces their structural applications. They are only available in coil and sheet. Stainless steel 430 and 409 are apt examples.

  • Duplex Stainless Steels

Duplex stainless steels have chromium between 18 and 28% and nickel alloying elements between 3.5 and 5.5%. Stainless steel in this grade possesses equal parts of ferrite and austenite and greatly resists pitting and chloride stress. They are weldable, easy to fabricate, magnetic, and offer better corrosion resistance than the austenitic grades. Examples are S and stainless steel grades.

  • Precipitation-hardening Stainless Steel Grades

They contain about 12-16% chromium, 3-8% nickel, and a small proportion of other alloying elements such as copper, aluminum, and titanium capable of forming a precipitate. They are usually very strong, ductile, and heat-treatable. They are machined in the annealed condition and then heat treated.

Advantages of Stainless Steel Over Alloy Steel

Stainless steel is one of the prominent materials with high use. It offers extensive advantages over alloy steel, such as:

  • Recyclability
  • It requires low maintenance
  • It offers higher corrosion resistance
  • Stainless steel provides better aesthetic appeal

Common Alloying Elements and Their Effects

Manufacturers across industries improve carbon steel’s mechanical properties with the help of more than 20 alloying elements. Each of these alloying elements offers distinct properties. Here are the top five (5) common alloying elements:

  • Chromium: the effect of chromium as an alloying element is often determined by its percentage. For instance, it can enhance a material’s hardness when used at a smaller portion, such as 0.2 – 2%. At the same time, it improves a material’s resistance to corrosion when used at a higher percentage, such as 4 – 18%.
  • Manganese: Using manganese with a low amount of sulfur and phosphorus ensures your formed steel is more malleable and less brittle.
  • Tungsten: This alloying element enhances the structural composition of the formed steel alloy. Moreover, it improves the heat resistance resulting in a higher melting point.
  • Nickel: Nickel affects a steel’s mechanical properties based on the percentage used. It increases the strength of the formed steel alloy when you use about 5%. Also, using a higher percentage above 12% enhances the corrosion resistance of the formed alloy.
  • Vanadium: Vanadium can enhance carbon steel’s heat resistance, strength, and entire grain structure when used at 0.15%. However, it offers improved hardness without compromised formability when used with chromium.

Differences Between Alloy Steel vs. Stainless Steels

This section compares the different aspects of alloy steel and stainless steel:

Physical Properties

Alloy steel is famous for its high strength-to-weight ratio, strength, and durability. Also, it maintains hardness at high temperatures and offers good wear and corrosion resistance. On the other hand, stainless steel is easy to clean and highly resistant to corrosion and stain. It is non-magnetic, durable, electrically conductive, and highly resistant to higher temperatures.

Chemical Composition

The alloying elements of alloy steel include a high amount of chromium, molybdenum, and other alloying elements. Using higher alloying elements helps heat-treat alloys to a wide range of hardness levels.

In contrast, stainless steel is highly resistant to acid, bases, and other organic solutions. Its primary constituents include chromium, carbon, and iron. However, certain varieties often contain nickel, manganese, silicon, and other elements.

Applications

Manufacturers often use alloy steels in the construction, automotive, oil and gas, aerospace, and manufacturing fields. On the other hand, typical applications for stainless steel include Kitchenware, medical equipment, the chemical and petrochemical industry, and the food and beverage industry.

Tensile Strength

Tensile strength describes a material’s ability to withstand tensile strength before it breaks. However, the alloy and the employed heat treatment often determine this property. Alloy steel is very durable, and its tensile strength is about 960 Mpa, while stainless steel is less durable and with a tensile strength of 621 Mpa.

Fatigue Strength

Fatigue stress defines a material’s ability to withstand stress for a particular number of cycles. A material’s fatigue stress is the maximum stress it can withstand. For instance, 146.45 Mpa is the fatigue stress of the stainless 316L.

Generally, stainless steels have lower fatigue strength than alloy steel—nonetheless, stainless steel grades like duplex stainless steel exhibit high fatigue strength due to their microstructure.

Other Comparisons for Alloy Steel Besides Stainless Steel

Besides stainless steel, other alternatives to using alloy steel include:

  • Chromium-vanadium

Combining vanadium atoms with chromium forms lattice structures with excellent strength-to-weight ratios. This makes chromium-vanadium ideal for various applications that need a strong and lightweight material. However, due to its strength, most manufacturers use chromium-vanadium to create cutting tools.

  • Aluminum

Aluminum is a typical material widely utilized in the automobile manufacturing industry. Aluminum products resist corrosion when exposed to water like iron-based metals do. Also, aluminum is perfect for making body panels and other structural components of vehicles because it is very strong and lightweight.

Other Comparisons for Stainless Steel Besides Alloy Steel

Here are other similar materials that stainless steel is compared against besides alloy steel:

  • Carbon Steel

Carbon Steel is one of the famous steel types. It is commonly used because of the durability and high strength it offers. Manufacturers generally use carbon steel for several applications because it costs less than stainless steel. High carbon steel provides excellent strength and resistance to wear, which many cutting tools need. Meanwhile, low-alloy steel offers versatility and malleability for machinery parts, cookware, and pipes.

  • Tool Steel

This is a carbon steel type commonly used for making tools. It exhibits remarkable hardness and wear resistance. As a result, manufacturers utilize these features in manufacturing products such as drill bits, knives, and saws.

Helpful Tips to Consider When Determining the Ideal Steel for Your Machining Project

Considering the tips below, you should be able to determine the right steel for your application.

Functional Requirement

The functional requirement of a product will always determine the steel type suited for such application. For instance, if a part is required to function in a marine environment, its corrosion resistance property is a primary factor. Hence, a stainless steel grade material is a perfect choice. Also, alloy steel would be ideal for structural applications such as construction.

Maintenance and Lifespan

Stainless steel is better than alloy steel when considering maintenance and lifespan. Stainless steel grades need little to no maintenance and exhibit longer lifespans because of their self-repairing properties. More importantly, stainless steel is recyclable.

Aesthetic Preferences

Stainless steel is quite famous for its aesthetic appeal. Hence, product designers and manufacturers in the architecture and interior designing sectors commonly use stainless steel for most parts. Its highly reflective surface makes it shiny and modern. Additionally, it is available in various shapes offering manufacturers extensive products.

Budget Constraint

The limitations of your budget determine the ideal steel type for your project. As far as cost goes, alloy steel is less expensive than stainless steel. However, it is advisable not to compromise quality for cost.

Conclusion

This article has detailed an explanation of alloy steel vs. stainless steel, discussing their distinct properties. Although both materials offer impressive mechanical properties and are critical to modern manufacturing, it would be best to determine the one that fits your machining project best, considering all variables.

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