C45E / 1.1191 Steel

C45E / 1.1191 Steel is a medium tensile steel supplied as forged or normalized condition. It has a tensile strength of 570 – 700 MPa and Brinell hardness range 170 to 210HB.C45E / 1.1191 Steel offers good strength, toughness,wear resistance and impact properties in either the normalized or hot rolled condition.C45E / 1.1191 Steel has a low through-hardening capability with only sections of size around 60 mm being recommended as suitable for tempering and through-hardening. However, it can be efficiently flame or induction hardened in the normalized or hot rolled condition to obtain typical surface hardness up to HRC 58. nitriding is not recommended due to lack of alloy elements.This steel can be readily welded and machined providing correct procedures are followed.

C45E / 1.1191 Steel Supply Form & Size

Form of Supply	Size(mm)	Length(mm)
Round bar	Φ6-Φ1,000	3,000-10,000
Square bar	100×100-600×600	3,000-6,000
Plate/Sheet	Thickness :20-400 Width:80-1,000	2,000-6,000
Flat bar/Blcoks	Thickness :120-800 Width:120-1,500	2,000-6,000

C45E / 1.1191 Steel Surface Finish&Tolerance

Surface Finish	Black-Forged	Black-Rolled	Turned	Grinding	Polished	Peeled	Cold Drawn
Tolerance	(0，+5mm)	(0，+1mm)	(0，+3mm)	Best h9	Best h11	Best H11	Best H11

Chemical Composition per EN 10083-2

GRADE	NUMBER	C	Si	Mn	P	S	Cr	Mo	Ni	Cr+Mo+Ni
C45E	1.1191	0.42-0.50	≤ 0.40	0.50-0.80	≤ 0.030	≤ 0.035	≤ 0.40	≤ 0.10	≤ 0.40	≤ 0.63

C45E / 1.1191 Steel Mechanical Property

Surface Finish	Tensile Strength Mpa	Yield Strength Mpa	Elongation, %	Hardness,HB
Cold Drawn	640–850	500–650	≥8	190–270
Smooth Turned	570–700	300–450	14 – 30	170–210
Hot Rolled / Forged	570–700	300–450	14 – 30	170–210

C45E / 1.1191 Steel Forging

Forging temperature: 1100 ^oC – 1200 ^oC,hold enough time for the steel to be thoroughly heated.Don’t forge below temperature 850°C.AISI 1045 steel  should be cooled as slowly as possible in still air or in sand after forged.

C45E / 1.1191 Steel Heat Treatment

• Normalizing:870℃-920℃,Cool in air
• Annealing:800℃-850℃,Cool in furnace
• Hardening:820 – 860°C/water or oil quench
• Tempering:550°C – 660°C, cool in still air
• Stress Relieving:550°C – 660°C ,cool in still air
• Flame and Induction Hardening:830°C – 860°C,quick quench in oil or water.Temper at 150°C – 200°C will reduce stresses in the case with minimal effect on its hardness.

C45E / 1.1191 Steel Machining

C45E / 1.1191 Steel has good machinability in normalized as well as the hot rolled condition. Operations such as tapping, milling, broaching, drilling, turning and sawing can be easily performed on the steel using suitable feeds, tool type and speeds as per the recommendations given by the machine manufacturers.

C45E / 1.1191 Steel Application

C45E / 1.1191 Steel is widely used for all industrial applications requiring more wear resistance and strength. Typical applications of AISI 1045 are as follows:

Axles, bolts, connecting rods, studs, rams, pins,rolls, spindles, ratchets, crankshafts, torsion bars,sockets, worms, light gears, guide rods etc.