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41L40 Cold Drawn Steel Bar

41L40 steel bar is a Chromium-Molybdenum steel with a lead addition that is widely used due to its ability to maintain its physical properties, even after extended exposure to high working temperatures. It has high hardenability, high wear resistance, and excellent toughness. The addition of lead in this grade improves machinability. Eaton Steel Bar Company stocks many diameters of 41L40 cold drawn steel to meet the market demand. 41L40 can be heat treated and annealed.

4340 cold-rolled-steel-bar

41L40 Cold Drawn Steel Bar Applications

Typical applications for this grade of steel include high temperature bolts, hydraulic machinery shafts, tractor & trailer axles, spindles and more. Grade 41L40 steel is ideal for forging. This grade is not recommended for applications exceeding 400 degrees Fahrenheit, since elevated temperatures will decrease ductility.

Shapes and Sizes

Eaton Steel Bar Company supplies 41L40 cold drawn steel bar in a variety of sizes ranging from – 1 ½”-4”. The shapes available for this grade include:

  • Rounds

Standard "41L40 Grade" Chemical Composition

Carbon 0.38-0.43
Manganese 0.75-1.00
Phosphorus (max) 0.035
Sulfur (max) 0.040
Silicon 0.15-0.35
Chromium 0.80-1.10
Molybdenum 0.15-0.25
Lead 0.15-0.35


Estimated Mechanical Properties for "Grade 41L40"

Tensile strength 105,000 psi
Yield strength 85,000 psi