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4140 P110 Heat Treated SBQ Bar

Hot rolled 4140 P110 steel bar is a medium-carbon alloy steel that has a high hardenability. P110 refers to a heat-treated condition which has favorable mechanical properties and impact resistance. This makes it a widely used alloy in the energy market.

4140 hot-rolled-steel-bar

4140 P110 Heat Treated Steel Bar Applications

Typical applications for this grade of steel include tubes, collars, and couplings for use in the energy market.


Eaton Steel Bar Company can meet the following specifications for this grade:

  • API 6A
  • API 5CT

Shapes and Sizes

Eaton Steel Bar Company supplies 4140 P110 steel bar in a variety of sizes ranging from 3”-12”. The shapes available for this grade include:

***Minimum Total Quantity Per Order is 10,000 lbs.***

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Standard "Grade 4140 P110" Chemical Composition

Carbon 0.40-0.43
Manganese 0.75-1.00
Phosphorus (max) 0.025 
Sulfur (max)


Chromium 0.80-1.10



Specified Mechanical Properties for "Grade 4140 P110"

Tensile strength (psi) 140,000 - 160,000
Yield strength (psi) 110,000 - 140,000
Elongation in 2” (%) min 14%
Reduction of area (%) min 40%
Brinell Hardness (BHN) 285 - 341
Charpy Impact (min) 20 ft-lbs @ -20°F