CK45
  
Identification

 

Designation by Standards
Brand Name Ravne No. Mat. No. DIN EN AISI
CK45 620 1.1191 Ck45 C45E 1045

 

Chemical Composition

 

Chemical Composition in Weight %
C Si Mn Cr Mo Ni V W Others
0.46 max. 0.40 0.65 max. 0.40 max. 0.10 max. 0.40 - - (Cr+Mo+Ni)=max. 0.63

 

General Information

Description
1045 is a medium carbon steel is used when greater strength and hardness is desired than in the "as rolled" condition. Extreme size accuracy, straightness and concentricity combine to minimize wear in high speed applications. Turned, ground and polished.

Applications
Component parts for vechiles, shafts, bushings, crankshafts, connecting rods and parts for the machine building industry and steel for axes, knives, hammers, etc.

 

Properties

Physical properties (avarage values) at ambient temperature:
Modulus of elasticity [103 x N/mm2]: 190-210
Density [g/cm3]: 7.84
Thermal conductivity [W/m.K]: 15.1

Coefficient of Linear Thermal Expansion 10-6 oC-1
20-100 'C 20-200 'C 20-300 'C 20-400 'C 20-500 'C 20-600 'C 20-700 'C
11.6 12.3 13.1 13.7 14.2 14.7 15.1

Continuous Cooling Transformation (CCT) Diagram

 

Heat Treatment

 


Soft Annealing
Heat to 650-700 'C, cool slowly. This will produce a maximum Brinell hardness of 207.

Hardening
Harden from a temperature of 820-850 'C, 830-860 'C followed by water or oil quenching.

Normalizing
Normalizing temperature ( 'C): 840-870 'C.

Tempering
Tempering temperature: See the data bellow.

Tempering Temperature ( 'C) vs. Hardness (HRC)
20 'C 50 'C 100 'C 150 'C 200 'C 250 'C 300 'C
56 56 56 54 52 49 45.5

Effect of Tempering Temperature on Hardness




Mechanical Properties vs. Diameter
Diameter Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Reduction in Area (%)
cold drawn, round bar (16-22 mm) 655 585 12 35
cold drawn, round bar (32-50 mm) 585 515 10 30
cold drawn, round bar (50-75 mm) 515 485 10 30
cold drawn, round bar (22-32 mm) 620 550 11 30
cold drawn, round bar (19-32 mm) 625 530 12 30
cold drawn, annealed, round bar (19-32 mm) 585 505 12 45
cold drawn, high temperature, stress relieved, round bar (16-22 mm) 655 515 15 45
cold drawn, high temperature, stress relieved, round bar (50-75 mm) 550 450 12 35
cold drawn, high temperature, stress relieved, round bar (32-50 mm) 585 485 15 40
cold drawn, high temperature, stress relieved, round bar (22-32 mm) 620 515 15 40
cold drawn, low temperature, stress relieved, round bar (22-32 mm) 655 585 11 30
cold drawn, low temperature, stress relieved, round bar (16-22 mm) 690 620 12 35
cold drawn, low temperature, stress relieved, round bar (50-75 mm) 585 515 10 25
cold drawn, low temperature, stress relieved, round bar (32-50 mm) 620 550 10 30
hot rolled, round bar (19-32 mm) 565 310 16 40
turned, ground and polished, round bar (19-32 mm) 675 405 24 45

 

Workability


Forging
Hot forming temperature: 1050-850 'C.

Machinability
Machinability is good, rated at 80% that of the AISI 1112 alloy used as a 100% machining rated steel.