Grades & Standards Reference
Carbon Steel Grades, Indexed Plainly
A reference index of common carbon steel grades — A36, S275, AISI 1018 and more — what each carbon grade specifies and where it is used.
Reference only — verify governing specifications before ordering; price on request
Information current as of
Carbon Grades Index
Common carbon steel grades by product group
An index of frequently specified carbon grades, grouped by the product family they govern. Each entry is a summary, not a substitute for the governing specification.
Structural
- A36
A general carbon structural steel used widely for structural shapes, plates and fabricated sections.
- S275
A European structural grade with a 275 N/mm² minimum yield for general construction and fabrication.
Machining & General
- AISI 1018
A low-carbon general-purpose steel with good machinability, used for shafts, pins and light components.
- AISI 1045
A medium-carbon grade for shafts, gears and parts needing higher strength after treatment.
Low-Carbon Sheet
- DC01
A cold-rolled low-carbon sheet steel for general forming and deep drawing.
- DC04
A deep-drawing low-carbon sheet steel for more demanding forming work.
How to Read a Grade
The carbon figure, in plain terms
How the carbon designation encodes its composition — the parts that govern any order.
Carbon content
The last two AISI digits are the carbon content in hundredths of a percent — 1045 is ~0.45% carbon.
Alloying family
The first two digits identify the alloy group — 10xx for plain carbon, 41xx for chromium-molybdenum.
Grade letter
A letter prefix or suffix (A36, S275, DC01) fixes the governing standard and its requirements.
Carbon content drives weldability and formability as much as strength — a higher-carbon grade is stronger but harder to weld, so the grade must be matched to the fabrication method, not the strength alone.
Why Noor Deira Steel
Specification reconciled, not assumed
Grade and standard are held exact against your brief. Material is verified against its governing standard before release.
Grade reconciled
Carbon grade, dimensions and delivery condition matched to the requirement.
Standard verified
Material verified against its governing specification before release.
MTC supplied
Mill test certificates and documents supplied per order.
FAQ
Carbon steel grades, answered directly
What is a carbon steel grade?
A carbon steel grade is a designation for steel whose main alloying addition is carbon. It is identified through codes like A36, S275 or AISI 1018 that fix chemical composition and mechanical properties.
What is the difference between low, medium and high carbon steel?
It is the carbon content. Low-carbon is soft and formable, medium-carbon balances strength and ductility, and high-carbon is hard and strong but harder to weld and form.
What does AISI 1018 or 1045 mean?
The first two digits identify the alloying family and the last two the carbon content in hundredths of a percent. 1045 is roughly 0.45% carbon, so it is stronger than 1018.
Does Noor Deira Steel supply carbon steel?
Grade, standard and dimensions are reconciled against each requirement. Material is verified against its governing standard before release, and availability is confirmed at quotation.
How do I request pricing for a specific carbon grade?
Pricing is always on request. Send a structured enquiry naming the grade, dimensions, quantity and destination.
Request Pricing by Grade
Send a structured enquiry naming the carbon grade and our commercial department responds with availability and pricing. Price is always on request.
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