Are Forged Steel Fittings Better than Cast Fittings?

Forged or cast steel fittings have many similarities as both require the heating of steel until it gets malleable. The manufacturing of steel products can happen with forging or casting steel. For the flanges we provide, all material is typically made from forgings or plate.

Steel casting is one of the processes where the metal is heated until it reaches a liquid state and then poured into a mold that shapes the desired product. Steel forging implies the application of mechanical forces to heated solid steel blocks shaped permanently into the desired products.

Forged Steel

Meaning of forged steel fittings

Forged components are manufactured from steel which is heated and hammered for a specific shape. The process realigns the metal grains that result in the final product that is much stronger, harder, and wear-resistant than the base metal or its cast counterparts. Forged components have 26% higher tensile strength compared to the same parts made from cast steel.

As per the studies by the Industrial and Manufacturing Engineering Department, forged components respond to better heat treatment. It can withstand more mechanical force and more substantial impacts. It is more effective in pairs subject to high loads and stress. Forging helps to limit the formation of pockets, gas voids, and, cavities within the piece.

Meaning of cast components

Cast parts are created by super-heating steel until it changes into a liquid. You can then pour the liquid steel into a mold. Cast parts cost less compared to forged parts but are much less common in today’s marketplace. These are usually considered the best choice when it comes to mass-produced parts for non-ASME applications.

Castings also work best in parts with internal cavities. Apart from this, another advantage of the castings includes alloy use. It involves anything that uses a high amount of nickel and it’s difficult to forge. Casting can also produce a large number of parts more consistently. Forged parts can be limited by the size of the available equipment. There are two common types of castings used: investment casting and sand casting.

In sand casting, the liquid steel is poured into a mold made from specialized clay or pressed sand. It is usually used for larger parts. In investment casting, the liquid steel is injected into the ceramic coating or metal dye. It is mostly used for smaller and more delicate parts.

Casting vs. steel forging

Both the manufacturing processes need the application of high temperatures to steel raw materials and the execution of CNC machining work during the end of the process, so it becomes easy to obtain the final product. The final product may also undergo surface finish treatment like polishing, powder coating, painting, wear hardening/protection, and types of coating like zinc plating.

Apart from that, forged and cast parts may be hard-faced, brazed, welded, and assembled before shipping the final product. The products resulting from forging and casting processes have different properties in terms of surface porosity, grain structure, tensile strength, and fatigue resistance.

Benefits of using castings and forgings

Below you can find the difference between using castings or forged steel fittings:

Benefit of castings

The prominent benefit of casting is to create components that are too complex, large, or otherwise unsuitable for the forging process. We can forge part sizes in various lengths and weights of several thousand pounds. But if you need an end product that weighs 5000 pounds, casting would be a more suitable option. You can use casting when:

. Parts need the addition of custom alloys

. Part is complicated

. Part is too large to forge

Benefits of forging

If you can forge the end piece, it must usually be forged. It gives the part more consistency in construction, better strength, tighter grain structure, and a longer lifetime. You can reach out to the engineers to see if forging is right for your project.


If you are still not able to understand which option is good for you, remember that it depends on the project. You must understand what you need the part to do. If you are looking for strength, forged is an option for you. However, if you want detail or a special alloy, the cast is an option you can opt for.

If you need assistance and want to know among forged steel fittings or cast fittings, is the right option for you, contact Texas Flange today!



What Are Different Grades of Carbon Steel Flanges?

Iron and carbon steel are the main components behind the manufacturing of carbon steel flanges and end flange connectors. These flanges help connect pipes to valves, pressure vessels, pumps, or other equipment. Grades of steel products change depending on the material ratio, such as the carbon content. Many grades of carbon steel flanges e.g. ASTM A105, ASTM A182, ASTM A694, ASTM A516, and ASTM A350 are available. The content of the carbon range is about 1% to 2.1% in weight in the carbon steel flanges.

The increase of carbon element content makes the steel sturdier and stiffer after the heat treatment, and it also becomes less ductile. Without the heat treatment, higher carbon will reduce weldability.

Carbon steel A105 flanges

The Carbon Steel A105 flanges are the forged carbon steel piping components that you can use for valves, flanges, and fittings in pressure systems at higher temperatures and ambient service conditions. You can reliably operate Carbon Steel A105 flanges under temperatures from 0 degrees to 550 degrees. They are helpful in hydro-carbon and marine engineering processes. You can also use it in nuclear power plants, oil and gas equipment, valves manufacturing, petrochemical plants, pumps manufacturing, and heat exchangers. There are many kinds of flanges like blind flanges, weld neck flanges, plate flanges, and much more.

Carbon steel A350 LF2 low-temperature flanges

The Carbon Steel A350 LF2 Flanges encompass many ring-rolled and carbon flanges, valves, low-alloy steel forged, and forged fittings for low temperatures. The flanges are extensively known for their durability, strength, pressure resistance, and temperature rating. The Carbon Steel A350 LF2 Flanges provide maximum machinability when hardened, forged, or normalized. It ends up gaining moderate strength and offers a leakage-proof connection at lower costs. These flanges are usually more in demand than conventional austenitic stainless due to their property of higher hardness versus cost.

Carbon steel in low alloy A182 Flanges

The grade of carbon steel flanges are helpful in stainless steel pipe flanges, forged fittings, valves, rolled alloy, and other high-temperature services. The Carbon Steel low chrome A182 Flanges are one of the outcomes of the ideal selection for low corrosion applications. These flanges do not get worn out as quickly. The use is widespread, especially in the paper, chemical, and petroleum industries. The features of this flange type make it the most reliable product that stays long and does not require repairing soon after the installation. If purchased from the right place, you can ensure the durability of this product.

Carbon steel A694 flanges for high yield service

It is the most stress-reliant carbon steel flange material in comparison to the above three. It is stringent to the high-pressure fluid transmission of gas and oil piping. Most of the property is steel-grade for high-yield service. Manufacturers need to develop well-built steel to withstand both high and cryogenic temperatures. With the increase in carbon content, the steel gets heavy after the heat treatment. It also becomes less ductile. If there is a lack of heat treatment, the chances become higher for carbon to reduce the ability to weld.

About forged steel flanges

There are many ways you can manufacture flanges, the most prominent ones being casting and forging. Flanges are basically a plate-like round device affixed at the end of the fitting, valve, pipe, etc which helps to put a piping system together. Manufacturers develop flanges of many materials that match the material that you use for pipes and fittings. There are usually two ways: Forged carbon steel and cast iron for older, less critical applications.

Forged steel is the excellent mechanical property of almost any flange product. The process of manufacturing happens with carbon steel, alloy steel, or stainless steel. The raw materials are beaten and cut into shape via hammers and presses, which helps to get rid of defects and blocks. A flange helps connect pipes to each other, often with an attachment of a valve to the pipe end. It is functional for the flange on inlets and outlets.

General grades of carbon steel flanges

Below are few common grades of carbon steel flange:

ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70 high yield

ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2 low temp

ASTM A105N (SA105N) forged

ASTM A516 Grades 55, 60, and 70 plate

How to prevent carbon steel flange from rust?

Carbon steel can get rust, but you can prevent it using the following solutions:

1. Oil varnishing: It helps to lubricate the carbon steel. Oil forms a protective barrier against rust and allows them to move with friction.

2. Anti-rust painting: Painting a carbon steel flange helps to cover metal components in a protective layer. It helps to prevent moisture from reaching the metal and therefore prevents rust and general corrosion.

3. Electric zinc-coated (Yellow or white zinc): Galvanising or electric zinc-coating is one method to prevent rust. It is easy to stop the reach of water and oxygen underneath the metal by coating it in a thin layer of zinc.


It is always better to get in-depth knowledge about the product you are willing to buy. You can find different grades of carbon steel flanges mentioned above from us. The guide will help to select the right one as per the requirement.

If you want any specific flange information, get in touch with us today!