Metal Alloys
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Carbon Steels
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Low-Carbon
Medium-Carbon
High-Carbon
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Resulfurized
High-Mn
H-Steels
Carbon Steel List
AISI 10xx
AISI 11xx
AISI 12xx
AISI 15xx
ASTM Steels
Resources
Bibliography
3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

more free publications
General Information
Carbon steels are steels whose alloying elements do not exceed the following limits:
ElementMax weight %
C1.00
Cu0.60
Mn1.65
P0.40
Si0.60
S0.05
Designation
Carbon steels are designated by distinct AISI (American Iron and Steel Institute) four-digit numbers. The first two digits indicate the grades of the steels, while the last two digits give the nominal carbon content of the alloy in hundredths of a percent. Here is an example:
 XX :0.xx% average carbon content
 
AISI 1060 
  
10 :Nonresulfurized grades
11 :Resulfurized grades
12 :Resulfurized and rephosphorized grades
15 :Nonsulfurized grades; max Mn content > 1%

If a letter L or B shows up between the second and third digits of an AISI number, it means that this grade is either a Leaded steel or a Boron steel; Sometimes a suffix H is attached to a AISI number to indicate that the steel has been produced to prescribed hardenability limits. Examples are:

Leaded steels :AISI 12L14, AISI 12L15...
Boron steels :AISI 15B48H...
H-steels :AISI 1038H, AISI 15B48H...
Glossary
3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.