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1045 Hot Rolled SBQ Bar

HR 1045 steel bar is a medium-carbon common steel grade with good weldability, higher strength, and impact properties for a variety of applications. 1045 steel is a widely available, common grade because of its cost and excellent properties. However, due to its low alloy content, this grade has limits on physical properties and options for heat treatments. Eaton Steel Bar Company stocks many diameters of this grade to meet the markets demand. We also supply 1045 steel bar to various industries like automotive, agriculture, ATV, construction, and motorcycle.

1045 hot-rolled-steel-bar

1045 HR Steel Bar Applications

Typical applications for this grade include bolts, fasteners, shafts, yokes, hubs, and gears. 


Eaton Steel Bar Company meets the following specifications for this grade:

  • A29
  • A576
  • QL-2 certified

Shapes and Sizes

Eaton Steel Bar Company supplies 1045 steel bar in a variety of sizes ranging from 5/8”-16”. The shapes available for this grade include:

  • Rounds
  • Rounded Cornered Square
  • Square

Standard "1045 Grade" Chemical Composition

Carbon 0.43-0.50
Manganese 0.60-0.90
Phosphorus (max) 0.040
Sulfur (max) 0.050


Estimated Mechanical Property Ranges for "Grade 1045"

Tensile strength (psi) 85,000 - 95,000
Yield strength (psi) 45,000 - 55,000
Elongation in 2” (%) 15 - 20
Reduction of area (%) 30 - 40
Brinell Hardness (BHN) 170 - 200