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Carbon Steel Square Bar 4" 1045

$497.30 for 12"
Height4"
MaterialCarbon Steel
Grade1045
Final discount, tax, and shipping calculated at checkout
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0"24"48"72"18"
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Request a quote for cuts longer than 18" · Non-refundable · Tolerance: ±0.125"
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Description

Carbon Steel Square Bar 1045 is a medium-carbon steel known for its good strength, toughness, and wear resistance. It is commonly used in applications that require higher strength than 1018, such as shafts, gears, and bolts. This square bar provides excellent machinability and can be heat treated to improve its mechanical properties. Ideal for structural and heavy-duty applications, it is a versatile material in both manufacturing and repair industries.
Not enough in stock? Call us referencing part #. We only show partial inventory online.
HEIGHT
Specifications
MaterialCarbon Steel
Grade/Alloy1045
ShapeSquare Bar
Height4.0 in
Max Length18 in
Weight/ft
MTRAvailable Upon Request
Characteristics
Shipping

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From the counter

About 1045 steel

1045 is a medium-carbon steel for parts that take real load or wear. The extra carbon, about 0.45%, buys a stronger, tougher bar you can actually heat treat: shafts, axles, pins, and equipment repair. If a 1018 part keeps bending or wearing out, 1045 is the next stop up. The chrome-plated shafting on our rack is 1045 underneath, plated for rollers, slides, and rod repairs.

Read the full 1018 vs A36 vs 1045 steel guide
Can you weld 1045?
Yes, but with homework: preheat it, use the right filler, and let it cool slowly, or the metal next to the weld turns hard and brittle. When in doubt on 1045, bolt it instead.
Should I buy 1018 or 1045?
1018 for clean machined parts that don't take much load. 1045 when the part carries load or wear, or when you plan to heat treat it. 1045 wins on strength and hardness, 1018 wins on easy machining and welding.