1045 Carbon Steel is a medium carbon, medium tensile steel supplied as forged or normalized. This steel shows reasonable strength and toughness. C1045 will through harden to 2.5” (63mm) with a tensile strength of 66-120 Ksi (620-850 MPa).
1045 Carbon Steel is known for its good strength and impact properties. It has good machinability qualities as well as serviceable welding qualities, whether in the rolled or normalized condition. Machinability is the ability to form the finished steel into a machined part.

Supply Range of AISI 1045 Carbon Steel 
AISI 1045 Steel Round Bar: diameter 10mm – 400mm
AISI 1045 Steel Plate: thickness 10 –500mm x width 200– 1400mm
AISI 1045 Steel Block: 210mm x 500-810mm

Form of Supply

AISI 1045 Carbon steel, we can supply the round bar, steel flat bar, plate, hexagonal steel bar, and steel square block. AISI 1045 steel Round bar can be sawn to your required lengths as one offs or multiple cut pieces. 1045 carbon steel Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.

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AISI 1045 Carbon steel (CK45)  Material Equivalent and Related Speciations

USA German Japan China ISO
ASTM A681 DIN 17350 JIS G4403 GB/T 1299 ISO 4957
1045 CK45 S45C 45 C45E4

Chemical Composition of AISI1045 (CK45)  Material

ASTM A681 C Si Mn P S Cr Mo Ni Cu Co
1045/ G10450  0.42 ~ 0.50 0.17～0.37 0.50～0.80 0.030 Max 0.030 Max ≤0.25 0.01 ≤0.3 ≤0.25 /
DIN 17350 C Si Mn P S Cr Mo Ni Cu Co
1.1191/CK45 0.42 ~ 0.50 ≤0.4 0.50～0.80 0.035 Max 0.030 Max ≤0.25 0.02 ≤0.3 ≤0.25 /
GB/T 1299 C Si Mn P S Cr Mo Ni Cu Co
45 0.42 ~ 0.50 0.20～0.45 0.50～0.80 0.030 Max 0.030 Max ≤0.25 0.01 ≤0.3 ≤0.25 /
JIS G4403 C Si Mn P S Cr Mo Ni Cu Co
S45C 0.42 ~ 0.48 0.15~0.35 0.60～0.90 0.030 Max 0.035 Max ≤0.2 0.02 ≤0.2 ≤0.3 /

 

Heat Treatment

1.Forging
Heat to 850°C – 1250°C (1562°F – 2282°F)
Hold until the temperature is uniform
Cool in furnace
2.Annealing
Full annealing of small C1045 forgings is carried out from 1450-1600ºF (790-870ºC)
followed by furnace cooling at 50ºF (28ºC) per hour, to 1200ºF (650ºC) soaking and air cooling.
3.Normalizing
Heat to 870°C – 920°C (1598°F-1688°F)
Hold until the temperature is uniform
Soak for 10 – 15 minutes
Cool in still air
4. Stress Relieving
Heat to 550°C – 660°C (1022°F – 1220°F)
Hold until the temperature is uniform
Soak for 1 hour per 25mm of section
Cool in still air
5.Hardening
Hardening of this grade is carried out from an austenitizing temperature of 1475-1550ºF (800-845ºC) and oil or water quenching.
6.Tempering
Re-heat to 400°C – 650°C (752°F – 1202°F ) as required
Hold until the temperature is uniform
Soak for 1 hour per 25mm of section
Cool in still air

Applications

This grade of steel is used for axles, bolts, forged connecting rods, crankshafts, torsion bars, light gears, guide rods, etc.

Contact

Contact our experienced sales team to help you with your 1045 Medium Carbon Steel questions. by Email or Telphone.

The questions will be replied in 24 hours.

Email: Jack@otaisteel.com

Tel:  +86-769- 23190193

Fax:  +86-769-88705839