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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 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”-12”. The shapes available for this grade include:

  • Rounds
  • Rounded Cornered Square
  • Square

1045 Chemical Properties

Carbon .43-.50
Manganese .60-.90
Phosphorus (max) .04
Sulfur (max) .05


1045 Mechanical Properties

Tensile strength 90,000 psi
Yield strength 50,000 psi
Elongation in 2” 20%
Reduction of area 30%
Brinell Hardness 180-220