Sales and promos are available online only

Proudly serving Canadians since 1997

Inventory and pricing updated multiple times a day

Carbon Steel Round Bar 3/4" 4140 Hot Rolled Annealed

$10.55 for 12"Offcuts only
Diameter3/4"
MaterialCarbon Steel
Grade4140
Final discount, tax, and shipping calculated at checkout
Offcuts only Longest piece today 5" · we bring more in for orders of $250 or more, 10 to 21 days Quote
1 Choose Your Length Enter your cut length
in
1/8 inch increments. Min: 1", Max: 5"
0"24"48"72"5"
2 Select Quantity How many lengths?
Shipping weight: --
3 Add to Cart Review your order
--
Total
--
Request a quote for cuts longer than 5" · Non-refundable · Tolerance: ±0.125"
Ships next business day Secure checkout Pickup available Serving Canadians since 1997
Visa Mastercard Interac Shop Pay

Description

Carbon Steel Round Bar 3/4″ 4140 Hot Rolled Annealed, cut to the length you need. Type your length in inches and the price shows up right away. We cut to ±1/8″. We ship anywhere in Canada from Dartmouth, NS, or you can pick it up free at our shop. There's a $40 minimum order.

Carbon Steel Round Bar 4140 HR ANN is a high-strength alloy steel round bar known for its toughness, impact resistance, and wear resistance. The hot-rolled and annealed process enhances its machinability and ductility, making it ideal for use in high-performance applications. Commonly used in automotive, aerospace, and manufacturing industries, it is suited for shafts, gears, and other components that require superior strength and fatigue resistance.
Not enough in stock? Call us referencing part #48. We only show partial inventory online.
DIAMETER
Specifications
MaterialCarbon Steel
Grade/Alloy4140
ShapeRound Bar
Diameter0.75 in
Max Length5 in
Weight1.5 lb/ft
MTRAvailable Upon Request
Characteristics
WeldabilityGood
MachiningGood
Bending/FormingFair
Wear ResistanceExcellent
CorrosionFair
Shipping

Pickup In-Store

  • Orders before 3pm ready next business day
  • Same-day? Call the team

Standard Delivery

  • Ships next business day (orders before 3pm)
  • Shipping calculated at checkout

Cash on Delivery

  • Available for established business accounts
  • Courier collects payment on delivery
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.