C45E (1045) Carbon Steel
1.1191
- EN1.1191
- ENC45E
- AISI1045
- UNSG10450
Unalloyed medium-carbon quenched and tempered steel. Economical, easy to machine and suitable for induction surface hardening; because of its low hardenability it is used in small sections and medium loads.
01Material Properties
- Rm 600–800 MPa (+QT, ≤ 16 mm)
- Low hardenability; section ≤ 25 mm
- Very good machinability
- Very suitable for induction / flame hardening (55–60 HRC surface)
- Economical
02Applications
- Shafts and pins
- Gears (low to medium load)
- Machine parts, keys, bushings
- Hydraulic pistons (chrome-plated shafting)
- General machine building
03Delivery Condition
- Normalised (+N), quenched and tempered (+QT) or cold drawn; ground / chrome-plated shafting.
04Heat Treatment
Typical values
- Soft annealing
- 650–700 °C; max. 207 HB
- Normalising
- 815–855 °C, air
- Hardening
- 820–850 °C; water (polymer)
- Tempering (QT)
- 540–660 °C, 1–2 h
- After QT (+QT)
- Rm 600–800 MPa, Rp0.2 ≥ 430 MPa (≤ 16 mm)
- Surface hardening
- Induction / flame; nitriding possible
Heat treatment cycle (schematic)
Tempering diagram (approximate)
Values are approximate and for information only; they vary with section size, heat and furnace conditions. Binding values are determined from the manufacturer’s data under laboratory conditions.
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