Comprehensive Guide to Forged Steel Valve A105N | THINKTANK

Author: Emma Ren

Jun. 30, 2025

Comprehensive Guide to Forged Steel Valve A105N | THINKTANK

In industrial valve selection, material quality is critical. Understanding the characteristics of each material helps engineers and buyers make the best decisions. Forged Steel Valve A105N is widely recognized in the industry for its excellent performance and reliability. This guide will give you a detailed overview of A105N material, so you can understand its applications and advantages.

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Forged Steel Valve A105N is made from ASTM A105 carbon steel and is normalized to improve its mechanical properties. This material is widely used in manufacturing a broad range of forged steel valves, including gate, globe, and check valves. These valves are essential in various industries such as oil and gas, refinery, and petrochemical. It is suitable for high-temperature and high-pressure environments, and it offers excellent durability and strength. Compared to cast steel valves, which are made by pouring liquid metal into molds to create various sizes and complex shapes, forged valves are particularly suited for high-temperature and high-pressure applications due to their superior mechanical properties.

Let’s explore the details of A105N material and its performance in different industrial applications.

What is A105N Material?

A105N is a carbon steel forging material that is widely used in manufacturing industrial valves and piping components. It has excellent mechanical properties and durability, making it suitable for high-temperature and high-pressure environments.

ASTM A105/A105N Chemical Composition

Additional Information on ASTM A105/A105N

  • Carbon (C): Adds hardness and strength.
  • Manganese (Mn): Enhances hardenability and tensile strength.
  • Phosphorus (P) and Sulfur (S): Typically impurities; low levels help maintain ductility and toughness.
  • Silicon (Si): Improves strength.
  • Copper (Cu), Nickel (Ni), Chromium (Cr), Molybdenum (Mo), Vanadium (V): These alloying elements enhance strength, hardness, and resistance to wear and corrosion.

A105 Ball Valve

A105N ball valves are an industrial valve made from forged carbon steel, which is designated as ASTM A105N. The “N” in A105N means that the steel is normalized. Normalizing is a heat treatment process that improves the mechanical properties of the steel, making it tougher and more durable. A105N ball valves are used in many industries including oil and gas, petrochemical, power generation, and water treatment.

Here are some key features of A105N ball valves

  1. Material Properties: ASTM A105N material is suitable for high-temperature and high-pressure applications. The normalization process makes it especially good for applications where you have thermal cycling and stress.
  2. Applications: These valves are used in the oil and gas industry, water management, chemical processing, and power generation. They’re robust enough to be used in both upstream and downstream applications.
  3. Temperature and Pressure Ratings: A105N ball valves typically handle high pressures and temperatures. They can handle temperatures up to 800 degrees Fahrenheit, depending on the valve design and construction.
  4. Types of Connections: You can get these valves with different types of end connections such as flanged, butt-weld, socket-weld, and threaded. This makes them versatile for different piping systems.
  5. Configuration Options: They come in different configurations such as full port and reduced port. This allows you to control flow rates and pressure drops based on your system requirements.
  6. Operational Modes: A105N ball valves can be operated manually with handles or gear units. They can also be automated with actuators depending on the installation and operational requirements.

A105 Gate Valve

The A105 Gate Valve is a critical component in industrial piping systems that provides reliable isolation in a wide range of applications. These forged steel gate valves are made from ASTM A105 carbon steel and are forged to provide excellent mechanical properties and durability. They are normalized to enhance their performance and make them suitable for high-temperature and high-pressure condition. A105 gate valves are designed to either fully open or fully close the flow of fluid, providing a tight seal when closed and minimal flow resistance when open. They are built to last and provide long-term service in demanding conditions.

Product Name: API602 forged gate valve threaded ends

Product Name: aPI602 forged gate valve flanged ends

A105 Globe Valve

The A105 Globe Valve is a type of forged valve used extensively in industrial applications where precise flow control is required. These valves are made from ASTM A105 carbon steel and benefit from the forging and normalization processes, which improve their strength and durability. Globe valves are designed to control flow by moving a disk or plug in and out of the flow path. This allows for fine control over the fluid flow, making A105 globe valves perfect for applications that require precise flow control. They are built to last and perform well in a variety of industries, including oil and gas, petrochemical, and power generation.

A105 Check Valve

The A105 Check Valve is designed to allow fluid flow in one direction while preventing backflow, which protects pumps and compressors in industrial systems. These valves are made from ASTM A105 carbon steel, which is forged and normalized to provide superior strength and increased durability. A105 check valves are critical in systems where backflow could cause damage or reduce efficiency. They automatically close when the flow reverses, preventing any backward movement of fluid. The reliable performance and sturdy construction of A105 check valves make them an essential component in a wide range of industrial applications, including chemical processing, oil and gas, and water treatment.

Product Name: A105N forged steel check valve threaded & socket weld

Product Name: A105N forged steel check valve Flanged

A105 Control Valve

The A105 Control Valve is a critical component in industrial systems that regulates process variables such as flow, pressure, temperature, and liquid level. These control valves are made from ASTM A105 carbon steel and are forged to withstand high pressures and temperatures. The forging process uses mechanical forces to form the metal into the desired shape, enhancing durability, corrosion resistance, and tensile strength. The normalization process further improves their mechanical properties, ensuring they perform reliably and accurately. A105 control valves are designed to modulate the flow of fluids based on the control signal they receive, giving you precise control over your industrial processes. They are built to last and provide precise control in demanding applications across a variety of industries.

Wall Thickness of A105 Valves

Measuring the wall thickness of A105 valves is important to make sure they will be safe to operate under specific pressure and temperature conditions. Here are the methods and standards we use to determine the wall thickness of A105 valves.

1. Use the Relevant Standards

The wall thickness of valves is usually determined based on international standards such as:

  • ANSI/ASME B16.34: This standard gives you all the details you need for the design, materials, manufacturing, testing, and inspection of valves, including how to calculate the wall thickness.

  • API 602: This standard applies to small diameter forged steel valves and covers different types of connections, including BSP or NPT threaded connections, as well as socket weld (SW) connections.

2. Design Pressure and Temperature

To determine the wall thickness of the valve, you need to know the design pressure and temperature. You choose the pressure rating (e.g., 150, 300, 600, 800, , ) based on the working conditions, and then you look at the corresponding minimum wall thickness requirements in the relevant standards.

3. Material Properties

The properties of ASTM A105 carbon steel also impact the choice of wall thickness. You need to make sure the material has enough strength and toughness under the expected temperature and pressure conditions.

4. Actual Measurement

For valves that have already been manufactured, you can use the following methods to measure the actual wall thickness:

  • Ultrasonic Thickness Gauge: This is a non-destructive testing method that uses an ultrasonic probe to measure the wall thickness directly.

  • Caliper or Micrometer: For smaller valves or accessible parts, you can use precision measuring tools to measure the wall thickness directly.

5. Test and Inspection Of the minimum wall thickness

The following is the ASME B16.34 Standard for each size of valve.

ASME-B16.34 Table 3-A Valve Body Minimum Wall Thickness, t

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