4142 Alloy Round Bar Stock

4142 Steel Bar Stock

4142 alloy is a medium-carbon steel that has been strengthened with chromium and molybdenum. It can be heat-treated to a high degree of strength while preserving an acceptable amount of toughness.

4142 Steel

4142 alloy steel grade is forged at around 2150oF and can be forged down to around 1700oF.

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 spheroidite structure for maximum machinability. Prior to air cooling, the steel should be austenitized at 1550oF and 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 then 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 that has been determined to provide the requisite mechanical qualities for the section size and complexity.


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

4142 Alloy Commonly Used for; 

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

4142 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

4142 Alloy Steel 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 alloy Steel   

4142 alloy steel is a type of steel that has been developed to provide a combination of high strength and toughness. It is widely used in machine components, structural members, and other industrial products.

4142 alloy steel is one of the world’s most widely used types of steel. It is mainly made from iron, chromium, nickel, molybdenum, and tungsten with a carbon content between 0.06% and 0.2%. This type of steel has a very high strength-to-weight ratio making it ideal for use in applications that require high strength with low weight, such as machine components and structural members.

4142 steel is a high-strength alloy steel that’s used in a variety of applications, including the automotive industry. It has excellent corrosion resistance, high-temperature strength, and high-toughness properties. 4142 steel is mainly used in the automotive industry for car frames and chassis parts. It also uses aerospace, construction machinery, and power generation equipment. 4142 alloy steel can also be used for other applications such as aerospace engineering and armor construction because it has good corrosion resistance.

4142 steel has a high yield strength and corrosion resistance. This makes it an ideal material for ships and offshore structures such as oil rigs.4142 steel has many advantages over other steels. It is also known for its ability to resist corrosion in the presence of seawater and salt air.

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

Get your 4142 Alloy bar stocks and 4142 Alloy round bar stocks now! Call us or request a quote!

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
Forte Metals Logo