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4142 Steel | Forte Metals

4142 Steel

4142 steel is the perfect balance of toughness and machinability.

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Built to withstand the toughest conditions: 4142 steel

The ultimate choice for high-stress applications: 4142 steel

After forging, the alloy may be slowly cooled or transferred to a furnace set at the end forging temperature. In effect, such a treatment would be a form of annealing treatment.

4142 Alloy Steel is a grade of steel that should be annealed to coarse pearlite to coarse spheroid structure for maximum machinability. Before air cooling, the steel should be austenitized at 1550oF, cooled to 1390oF at 25oF or 14oF per hour, or alternately cooled to 1250oF and held for 5 hours for an iso-anneal. Simultaneously, this can be normalized at 1600°F (870°C) and cooled by air.

Depending on the size and complexity of the piece, the steel will be austenitized at 1550 – 1600oF before being quenched in water or oil. The steel would be tempered at a heat level determined to provide the requisite mechanical qualities for the section size and complexity.


4142 round is a high-quality medium-carbon alloy structural steel that has been quenched and tempered. If you are one that requires this material, Forte Precision Metals guarantees that you will receive the best round bar stocks that meet your requirements.

Common Uses for 4142 Round Bar

  • Shafts
  • Gears
  • Bolts
  • drill collars
  • Resistance welding products
  • Studs
  • Couplings
  • connecting rods
  • tool joints
  • spindles, 
  • tool holders
  • Kelly bars
  • Subs

Steel Properties

Physical Properties


Tensile Strength 

Tensile Strength, 

Reduction of Area 

Modulus of Elasticity 

Bulk Modulus 

Poissons Ratio Typical for 

Shear Modulus


380 (Brinell)

204800 psi

140000 psi

48 %

9900 ksi

23600 ksi


11600 ksi

Chemical Elements











0.40 – 0.45 %

0.80 – 1.1 %

>= 96.725 %

0.75 – 1.1 %

0.15 – 0.25 %

<= 0.035 %

0.15 – 0.30 %

 <= 0.040 %

Why Buy a 4142 Round Bar?

If you’re looking for a high-strength and versatile steel alloy, then a 4142 round bar may be the perfect choice for your application. This alloy offers excellent toughness, wear resistance, and machinability, making it ideal for use in a variety of industries, including aerospace, automotive, and industrial manufacturing. 

The high levels of strength and durability of 4142 steel make it well-suited for demanding applications, such as machine parts, gears, and shafts, that require a material that can withstand high stress and pressure. 

Additionally, the excellent machinability of 4142 steel allows for easy fabrication and customization, making it a popular choice for projects that require precision and accuracy. 

Overall, a 4142 round bar is a reliable and cost-effective solution for those seeking a strong and versatile steel alloy for their application needs.

Best Quality 4242 Round Bar

Forte Precision Metals is here if you need an efficient alloy steel round bar supplier and a centerless ground bar supplier who provides you with quality 4142 round bar stocks! We work closely with our clients to ensure their precision ground bars are delivered to the correct specifications.

Get quality round bar stocks now! Call us or request a quote!

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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