4130 (E4130) alloy steel round bar – This type of steel is also commonly referred to as a chromoly steel, or chrome moly steel. Due to its relatively low carbon content of 0.28/0.33%, it offers exceptional weldability. With the proper heat treatment it is also readily machined. Annealing 4130 (E4130) alloy steel offers excellent ductility. It can also be normalized or otherwise heat treated. 4130 (E4130) alloy steel has an excellent strength to weight ratio and is considerably stronger and harder than other standard grades of steel. Chromoly steels are especially useful in their ability to retain their bulk properties while allowing for significant hardness to be attained.4130 (E4130) steel alloy is used primarily in the construction of commercial and military aircraft and ground support systems as well as automotive, race cars, off road, hydraulic tools, and machine tool applications. It is an intermediate strength material. Lighter gauges offer lighter weight but still maintain great strength, making it excellent for auto racing and aerospace. Engineers also use 4130 (E4130) alloy steel for parts such as pins used to secure a critical assembly. These pins are designed to fail at a specific yield in order to avoid a catastrophic failure, and 4130 (E4130) alloy steel stands up to this test.

4130 (E4130) alloy steel round bar

4130 (E4130) alloy steel round bar

Typical Chemical Properties:

Carbon 0.28/0.33 Sulfur 0.025 max. Molybdenum 0.15/0.25
Manganese 0.40/0.60 Silicon 0.15/0.35 Nickel 0.25 max.
Phosphorus 0.025 max. Chromium 0.80/1.10 Copper 0.35 max.


AISI 1212 AS 100%
Rounds 3/8″-4″ Cold Finished & Normalized AMS 6370 / 2301 241 75%
3/4″-10″ Hot Rolled M.S. Normalized 229
3/8″-1-1/2″ Cold Finished & Heat Treated 321 45%
Hexagons 3/8″-2″ Cold Finished & Annealed 241 72%
3/8″-1-1/2″ Cold Finished & Heat Treated 321 45%
Squares 1/2″-1-1/2″ Cold Finished & Normalized 241 75%
1/4″-1-1/2″ Cold Finished & Heat Treated 321 45%
Flats 3/16″ x 1-1/2
Min 4″ x 6″ Max
Cold Finished & Normalized 241 75%
1-1/2″ x 5″
Min 4″ x 6: Max
Hot Rolled & Normalized 229
3/4″ x 1″
Min 1-1/2″ x 3″
Cold Finished & Heat Treated 321 45%


WE EXPORT TO:Bahrain, Brazil, Chile, Egypt, India, Iran, Iraq, Kuwait, Lebanon, Middle East, Mexico, Nigeria, Oman, Saudi Arabia, South Africa,

South America, Qatar, Russia, Turkey, United States, UAE, Venezuela, Yemen & around the globe.

Peeled Round Bar

What is Peeled / Turned Round Bar ?

SS 430F Round Bars