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Grade 4140 P110 Heat Treated Steel Bar

Grade 4140 P110 is a low alloy steel grade with medium carbon content.  In the heat treated condition, it has favorable mechanical properties and impact resistance which makes it a widely used alloy in the energy market.

4140 hot-rolled-steel-bar

4140 P110 Steel Bar Applications

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

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:

  • Rounds

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



Estimated Mechanical Properties for "Grade 4140 P110"

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