1045 Carbon Steel Coil (Cold Rolled, HRC 15-20)

The 1045 Carbon Steel Coil (Cold Rolled, HRC 15-20) offers a perfect combination of medium carbon strength, excellent machinability, and precision surface finish. Designed specifically for manufacturing applications where both strength and dimensional accuracy are critical, this cold rolled coil is widely used in industries such as automotive, machinery, toolmaking, and engineering.

The HRC 15-20 hardness rating indicates a softer, more machinable condition, ideal for parts that require further processing like machining, forming, and heat treating.

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Key Feature

• Medium Carbon Strength
  1045 provides superior mechanical strength compared to low carbon steels, suitable for parts requiring wear resistance and higher load-bearing capacity.

• Cold Rolled Precision
  Cold rolling delivers tighter tolerances, improved surface finish, and enhanced dimensional accuracy.

• Controlled Hardness (HRC 15-20)
  Soft enough for excellent machinability while maintaining core strength.

• Excellent Machinability & Workability
  Easily cut, drilled, turned, and milled; suitable for high precision CNC operations.

• Heat Treatment Capability
  Can be further heat-treated to increase hardness, tensile strength, and wear resistance after machining.

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Applications of 1045 Carbon Steel Coil (Cold Rolled, HRC 15-20)

• Shafts and axles

• Gear blanks

• Couplings and connecting rods

• Hydraulic components

• Pins, studs, and bolts

• Machine tool parts

• General-purpose mechanical components

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Technical Specifications

Property	Specification
Grade	1045 Carbon Steel
Standard	ASTM A29, SAE J403
Carbon Content	0.43–0.50%
Manganese Content	0.60–0.90%
Hardness	HRC 15-20
Tensile Strength	570–700 MPa
Yield Strength	440 MPa (min)
Elongation	16% min
Surface Finish	Cold Rolled (Bright Finish)
Coil Widths	12mm to 1500mm (custom widths available)
Coil Thickness	0.5mm to 12mm
Coil Weight	Custom per order
Tolerance	Tight dimensional tolerances per ASTM specifications
Formability	Excellent (in cold rolled condition)
Weldability	Fair (preheating recommended)

Manufacturing Standards

• ASTM A29/A29M

• SAE J403

• ISO 9001 Certified Production

• Full Mill Test Certificates (MTC) Provided

• RoHS & REACH Compliant

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Storage & Handling Recommendations

• Store indoors, away from moisture

• Keep coils sealed to prevent surface oxidation

• Use appropriate coil handling equipment to prevent physical damage

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Advantages of Choosing 1045 Carbon Steel Coil (Cold Rolled, HRC 15-20)

• High strength and wear resistance for demanding applications

• Excellent surface finish for precision manufacturing

• Ideal hardness for further machining and heat treatment

• Consistent mechanical properties across coils

• Custom sizes and slit coils available

• Faster production and reduced finishing costs

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FAQ For This Product

What is 1045 Carbon Steel Coil used for?It’s used for precision machined parts like shafts, gears, couplings, and machine components that require medium carbon strength and excellent machinability.What does HRC 15-20 mean?This indicates the Rockwell Hardness (HRC) range. 15-20 HRC is considered soft for 1045, making it excellent for machining before final hardening.Can 1045 Carbon Steel Coil be heat-treated?Yes. After machining, 1045 can be heat-treated (quenched and tempered) to achieve higher hardness and tensile strength.Is cold rolled 1045 better than hot rolled?Cold rolling provides better dimensional accuracy, smoother surface finish, and improved mechanical properties compared to hot rolled.Do you offer custom sizes for 1045 Carbon Steel Coil?Absolutely. We can slit, cut-to-length, and customize coil sizes per your project requirements.Is 1045 Carbon Steel Coil weldable?It is weldable, but preheating and post-weld heat treatment are recommended to reduce the risk of cracking.