4130 ALLOY​ Round Bar Stock

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4130 Steel Round Bar

4130 alloy has a lot of fantastic features. It is a free-machining, high-carbon, heat-treatable metal with moderate corrosion resistance and high hardness.

4130 Round Stock

4130 alloy is chromium-molybdenum alloy steel with low carbon content. It has a density of 7.85 g/cm3 (0.284 lb/in3) and is heat-treated for hardness.

It’s excellent welding steel that can be welded using any commercial process and can be machined in its normalized/tempered state. 4130 steel can be cold worked, hot worked and forged without difficulty, but it cannot be aged. 

It is a through-hardening alloy with high ductility when annealed. 4130 steel is primarily used as structural steel and is most commonly seen as round tube or bar stock in aircraft and construction structures.


4130 alloy is a robust metal used in manufacturing, welding, cutting, and other high-stress industrial applications. 4130 steel’s excellent heat treatment qualities provide a high level of toughness. When paired with its excellent workability and machinability, makes it a versatile material. It has lots of common applications which is why 4130 alloy bar stock is in demand. 

If you are one that requires this alloy steel material, Forte Precision Metals guarantees that you will receive the best 4130 Alloy bar stocks and 4130 Alloy round bar stocks that meet your requirements.

4130 Steel Round Bar Commonly Used for;

  • Bearings
  • vehicle parts
  • gears
  • Drill bits 
  • taps
  • Mills 
  • Cutters
  • Rock crushing machinery
  • Resistance welding products

4130 Alloy Properties

Physical Properties

Modulus of Elasticity 

Ultimate Tensile Strength 

Tensile Yield Strength

Rockwell B Hardness 

Elongation at Break 


29700 ksi

97200 psi

63100 psi



4130 Alloy Chemical Elements











97.03 – 98.22

0.80 – 1.10

0.40 – 0.60

0.280 – 0.330

0.15 – 0.30

0.15 – 0.25



Forte Precision Metals is here for you if you need an efficient alloy steel round bar supplier and a centerless ground bar supplier who provides you with quality 4130 alloy bar stocks! We work closely with our clients to ensure that their precision ground bars are delivered to the correct specifications.

Get your 4130 Alloy bar stocks and 4spheroid30 Alloy round bar stocks now! Call us or request a quote!

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Contact info

Forte Precision Metals provide Precision Ground Bars & Centerless Ground services nationally and worldwide
Forte Percision Metals, Inc.
9234 Parklane Ave. Franklin Park, IL 60131
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