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Low Alloy Steel Pipe ASTM A423

ASTM A423 Low Alloy Steel Pipe Seamless and electric welded low alloy steel pipe for use in cryogenic conditions. These pipes are typically used in applications requiring excellent notch toughness at low temperatures, making them suitable for use in pressure vessels and heat exchangers.


Low Alloy Steel Pipe ASTM A423: Material, Specification, Key Features


Low alloy steel pipes are widely used in various industries due to their excellent mechanical properties and high resistance to corrosion. One such popular low alloy steel pipe is ASTM A423. In this article, we will explore the material, specification, key features, chemical composition, mechanical properties, steel grade, application, and possible alternative grades of ASTM A423.

Material and Specification

ASTM A423 is a specification that covers seamless and electric-welded low alloy steel tubes for pressure purposes. These tubes are intended for use in applications where corrosion resistance is important. The material used in ASTM A423 pipes is a low alloy steel, which means it contains a small percentage of alloying elements such as chromium, molybdenum, and vanadium.

Key Features

  • Corrosion resistance: ASTM A423 pipes exhibit excellent resistance to corrosion, making them suitable for various environments.
  • High strength: The low alloy steel used in these pipes provides high strength and durability, making them ideal for applications requiring robustness.
  • Seamless and electric-welded: ASTM A423 pipes are available in both seamless and electric-welded forms, providing flexibility in choosing the right type for specific applications.
  • Pressure purposes: These pipes are designed to withstand high-pressure conditions, making them suitable for applications where pressure resistance is crucial.

Chemical Composition

Element Composition Range (%)
Carbon (C) 0.15 max
Manganese (Mn) 0.60-1.35
Phosphorus (P) 0.035 max
Sulfur (S) 0.040 max
Silicon (Si) 0.10-0.50
Chromium (Cr) 0.50-1.25
Molybdenum (Mo) 0.45-0.65
Vanadium (V) 0.02-0.10

Mechanical Properties

Property Minimum Value
Tensile Strength 60,000 psi (415 MPa)
Yield Strength 30,000 psi (205 MPa)
Elongation 30% min
Hardness 79 HRB max

Steel Grade

ASTM A423 is available in one grade:

  • Grade 1: This grade of low alloy steel pipe offers excellent corrosion resistance and is suitable for various applications.


ASTM A423 pipes find extensive use in industries such as oil and gas, petrochemical, power generation, and chemical processing. They are commonly used in applications involving high-pressure environments, such as heat exchangers, boilers, and condensers. The corrosion resistance and high strength of ASTM A423 make it an ideal choice for these demanding applications.

Possible Alternative Grades

While ASTM A423 is a widely used low alloy steel pipe, there are alternative grades available in the market that offer similar properties. Some possible alternative grades include ASTM A335 P11, ASTM A213 T11, and ASTM A199 T11. These grades also provide good corrosion resistance and high strength, making them suitable substitutes for ASTM A423 in certain applications.

In conclusion, ASTM A423 low alloy steel pipes offer excellent corrosion resistance, high strength, and durability. They are widely used in various industries for applications requiring pressure resistance. Understanding the material, specification, key features, chemical composition, mechanical properties, steel grade, application, and possible alternative grades of ASTM A423 can help in selecting the right pipe for specific requirements.

Additional information


oil and gas, petrochemical, power generation, and chemical processing


Grade1 Grade3

Surface Treatment

Hot Rolled Cold Rolled

Section Shape

Square Rectangular Round

Payment terms

L/C Western Union D/P D/A T/T MoneyGram


In bundles or in wooden boxes.

Secondary Or Not


Company Profile

TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and

trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and

credibility among domestic and foreign customers.

The company’s production plant covers an area of over 10,000 square meters, with an annual production

capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which

can satisfy customers’ personalized needs for raw materials in terms of diversity and timeliness.

The group holds shares in more than ten domestic production entities, whose main products include

seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings

( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.),

aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC

deep processing of metal materials such as tubes, rods, and casting parts.

Over the past 30 years, the company has been gradually developing new technologies and materials to meet

the growing needs of customers and various diversified needs, exporting to more than 56 countries and still

increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and

to facilitate one-stop purchasing for customers




Workshop Show


Testing equipment