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Steel grades of carbon steel pipes

Date:2025-11-03View:21Tags:carbon steel pipe steel grades,cs pipe steel grades
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Carbon steel pipes are valued across industries for their strength, reliability, and affordability. To choose the most suitable product, it’s essential to understand the different steel grades and how their properties affect performance. This article outlines common grade classifications, key standards, typical application areas, and practical selection advice.

 

Importance of Steel Grades in Carbon Steel Pipes

The steel grade determines a pipe’s mechanical strength, toughness, weldability, and long-term durability. Higher grades generally offer greater yield strength and superior resistance to pressure, but may come with reduced weldability or higher costs. Choosing the right grade helps balance safety, efficiency, and cost-effectiveness—especially in demanding sectors such as oil and gas, power generation, and petrochemical processing, where material performance is critical.

 

Common Carbon Steel Pipe Grades and Standards

Several international standards define the grades and performance requirements for carbon steel pipes, including:

ASTM A53 Grade A/B

Suitable for general-purpose applications such as water, gas, and low-temperature service.

 

ASTM A106 Grade B/C

Designed for seamless carbon steel pipes used in high-temperature environments.

 

ASTM A333 Grades 1, 3, 6

Intended for low-temperature carbon steel piping systems.

 

API 5L Grades B, X42, X52, X60, X65

Used in line pipes transporting oil, gas, and water under varying pressures.

 

ASTM A179, ASTM A192

Applied in boiler tubes and heat exchangers requiring excellent heat transfer performance.


Common ASTM Steel Grades for Carbon Steel Pipes

ASTM Grade

Type / Manufacturing Method

Main Application / Description

A53

Welded and Seamless Carbon Steel Pipe

For ordinary uses such as water, gas, and steam lines.

A106

Seamless Carbon Steel Pipe

For high-temperature service.

A161

Seamless Low-Carbon and Carbon-Molybdenum Steel Pipe

For refinery service, distillation tubes.

A178

Electric-Resistance-Welded Carbon Steel Tube

For boilers, superheaters, and heat exchangers.

A179

Seamless Cold-Drawn Low-Carbon Steel Tube

For heat exchangers and condensers.

A134

Electric-Fusion (Arc) Welded Steel Pipe

16 inches and over in diameter.

A192

Seamless Carbon Steel Boiler Tube

For high-pressure service.

A135

Electric-Resistance-Welded Steel Pipe

For conveying gas, vapor, water, or other liquids.

A199

Seamless Cold-Drawn Intermediate Alloy Steel Tube

For heat exchangers and condensers.

A139

Electric-Fusion (Arc) Welded Steel Pipe

4 inches and larger, for pressure and structural purposes.

A200

Seamless Intermediate Alloy Steel Pipe

For refinery service, distillation tubes.

A209

Seamless Carbon-Molybdenum Alloy Steel Tube

For boilers and superheaters.

A210

Seamless Medium-Carbon Steel Tube

For boilers and superheaters.

A211

Spiral-Welded Steel Pipe

For general engineering and pressure service.

A213

Seamless Ferritic and Austenitic Alloy Steel Tube

For boilers, superheaters, and heat exchangers.

A214

Electric-Resistance-Welded Carbon Steel Tube

For heat exchangers and condensers.

A226

Electric-Resistance-Welded Carbon Steel Tube

For high-pressure boilers and superheaters.

A250

Electric-Resistance-Welded Carbon-Molybdenum Alloy Steel Tube

For boilers and superheaters.

A252

Welded and Seamless Steel Pipe Piles

For structural and piling applications.

A254

Copper-Brazed Steel Tube

For automotive and refrigeration applications.

A333

Seamless and Welded Steel Pipe

For low-temperature service.

A334

Seamless and Welded Carbon and Alloy Steel Pipe

For low-temperature applications.

A335

Seamless Ferritic Alloy Steel Pipe

For high-temperature service.

A370

Test Methods and Definitions for Steel Products

Describes mechanical testing requirements.

A381

Metal-Arc-Welded Steel Pipe

For high-pressure transmission service.

A405

Seamless Ferritic Alloy Steel Pipe

For high-temperature service with special heat treatment.

A422

Butt-Welded Steel Tube

For refinery guided-wave applications.

A423

Seamless and Welded Low-Alloy Steel Pipe

For general industrial and pressure service.

A450

General Requirements for Carbon and Alloy Steel Pipe

Covers standard manufacturing and inspection rules.

A498

Seamless and Welded Carbon, Ferritic, and Austenitic Alloy Steel Tube

With integral fins for heat exchangers.

A500

Welded and Seamless Cold-Formed Carbon Steel Structural Tube

For structural applications, round or shaped sections.

A501

Hot-Formed Welded and Seamless Carbon Steel Structural Tube

For structural use at moderate temperatures.

A512

Cold-Drawn Butt-Welded Carbon Steel Mechanical Tube (CDBW)

For mechanical use; Grades 1010, 1012, 1020.

A513

Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tube (ERW-DOM)

For mechanical use; DOM supplied as 1020 or 1026 grades.

A519

Seamless Carbon and Alloy Steel Mechanical Tube (CDS or HFS)

For mechanical use; common grades include 1016, 1026, 4130, 4140.

A520

Supplementary Requirements for Seamless and ERW Carbon Steel Pipe

For high-temperature boiler applications.

A523

Plain-End Seamless Electric-Resistance-Welded Steel Pipe

For high-pressure pipe-type cable circuits.

A524

Seamless Carbon Steel Pipe

For ordinary fluid service and low-temperature use.

A530

General Requirements for Specialized Carbon and Alloy Steel Pipe

For additional testing and dimensional requirements.

A539

Electric-Resistance-Welded Steel Pipe

For natural gas and fuel oil pipelines.

A556

Seamless Cold-Drawn Carbon Steel Tube

For feedwater heaters.

A557

Electric-Resistance-Welded Carbon Steel Tube

For feedwater heaters.

A587

Electric-Resistance-Welded Carbon Steel Pipe

For chemical process piping.

A589

Seamless

 

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