Carbon steel, also called plain-carbon steel, is steel where the main alloying constituent is carbon. The American Iron and Steel Institute (AISI) defines carbon steel as: "Steel is considered to be carbon steel when no minimum content is specified or required for chromium, cobalt, columbium, molybdenum, nickel, titanium, tungsten, vanadium or zirconium, or any other element to be added to obtain a desired alloying effect; when the specified minimum for copper does not exceed 0.40 percent; or when the maximum content specified for any of the following elements does not exceed the percentages noted: manganese 1.65, silicon 0.60, copper 0.60."

The term "carbon steel" may also be used in reference to steel which is not stainless steel; in this use carbon steel may include alloy steels.

Applications

Carbon Steel is used in the most critical engineering applications and also in certain applications in the automotive sector. In addition, some of the value-added Carbon Steel products include steel for LPG cylinders, API grade, corrosion resistant steel, critical structural application steel, boiler quality, auto grades, precision tubes and medium/high carbon grades, among others.

Carbon Products
A53 A106 API5L Grade B/C X42 Seamless Pipe
Size Range : 1/8" - 26" 
Schedules : 20, 30, 40, Standard (STD), Extra Heavy (XH), 80, 100, 120, 140, 160, XXH
Grades : ASTM A53 Gr B, ASME SA53 Gr B, API-5L Gr B, ASTM A106 Gr B, ASME SA106 Gr B, ASTM A106 Gr C, PSL 1 and PSL2

API5L X-42 X-52 X-60 Seamless Pipe
Size Range : 2" - 24" 
Schedules : Standard (STD), Extra Heavy (XH), 100, 120, 160, XXH
Grades : PSL1 and PSL2

A333 (Low Temp) Grade 1/6 Carbon Steel Seamless Pipe
Size Range : 1/2" - 24" 
Schedules : Standard (STD), Extra Heavy (XH), 100, 120, 160, XXH

A53 API5L Grade B X-42 X-52 X-60 ERW (Electric Resistance Welded) Pipe
Size Ranges : 2" - 24" 
Schedules : 10, 20, Standard (STD), Extra Heavy (XH) 
Non-Schedules : .120wall, .156wall, .188wall, .203 wall, .219wall etc. 
Grades : API-5L Gr B, API-5L Gr X42, API-5L Gr X52, API-5L Gr X60, API-5L Gr X65PSL1 and PSL2

API5L Grade B X-42 X-52 X-60 DSAW/SAW
Size Ranges : 26" - 60" 
Schedules : 20, Std, XH, 30, 
Grades : API-5L Gr B, API-5L Gr X42, API-5L Gr X52, API-5L Gr X60, API-5L Gr X65PSL1 and PSL2

Sizes (Seamless): 1/2” NB - 60” NB
Sizes (ERW): 1/2” NB - 24” NB
Sizes (SAW): 16” NB - 100” NB

Wall Thickness available:
Schedule 20 - Schedule XXS (heavier on request) up to 250 mm thk.