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Carbon Steel Round Bar 2-1/4" 4140 Hot Rolled Heat Treated Stress Relieved

$55.38 for 12"
Diameter2-1/4"
MaterialCarbon Steel
Grade4140
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Quarter-inch increments. Min: 1", Max: 96"
0"24"48"72"96"
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Request a quote for cuts longer than 96" · Non-refundable · Tolerance: ±0.125"
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Description

Carbon Steel Round Bar 4140 HR HTSR is a high-strength alloy steel round bar that has been hot-rolled and heat-treated to provide superior tensile strength, wear resistance, and fatigue resistance. Known for its toughness and ability to withstand high-stress conditions, it is commonly used in demanding applications such as shafts, gears, and other critical components in the aerospace, automotive, and industrial sectors. This round bar offers excellent performance where durability and high strength are essential.
Not enough in stock? Call us referencing part #56. We only show partial inventory online.
DIAMETER
Specifications
MaterialCarbon Steel
Grade/Alloy4140
ShapeRound Bar
Diameter2.25 in
Max Length96 in
Weight13.52 lb/ft
MTRAvailable Upon Request
Characteristics
WeldabilityGood
MachiningGood
Bending/FormingFair
Wear ResistanceExcellent
CorrosionFair
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From the counter

About 4140 steel

4140 is chromoly, a chromium-molybdenum alloy steel that heat treats to high strength and toughness. It's the grade for parts that take serious load or shock: shafts, axles, gears, couplings, and tooling. You machine it in the annealed state, then harden and temper for the strength the part needs.

Read the full 1018 vs A36 vs 1045 steel guide
What is 4140 used for?
High-stress parts: shafts, axles, gears, and tooling that need strength and toughness beyond plain carbon steel. It's heat-treatable, so you machine it soft and harden it after.
Can you weld 4140?
It welds, but it's an alloy steel with real carbon, so preheat and post-weld heat treatment matter or the weld zone cracks. For loaded parts, plan the heat treatment around the joint or design it bolted.