45C8 Grade Introduction:

45C8 Carbon steels have carbon as the key alloying element in their composition. They also contain up to 0.4% silicon and 1.2% manganese. In addition, residual elements such as copper, molybdenum, aluminum, chromium, and nickel are present in these steels.

 

45C8 Grade Application:

45C8 steel grade round bar, steel plate, flat and square is used for axles, bolts, forged connecting rods, crankshafts, torsion bars, light gears, guide rods, screws, forgings, wheel tyres, shafts, sickles, axes, knives, woodworking drills, hammers, etc.

 

45C8 Equivalent grades:

EN8	080A40	CK45	45C8	EN8	1040,1045
EN8A	080A40	CK45	45C8	EN8A	1040, 1045
EN8B	080A40	CK45	45C8	45C8	1040, 1045
EN8C	080A40	CK45	45C8	EN8C	1040,1045
EN8D	080A40	CK45	45C8	EN8D	1040, 1045

 

Addition to other grades:

MS, EN1A, EN3B, EN8, EN8D, EN9, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS M2, M35, M42, DIN-1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTM SA-105 , SAE1018, SAE1010, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.

 

Our Supply Range:

 

Price List:

 

 

 

45C8 Chemical composition:

The following table shows the chemical composition of 45C8 steel:

Element	C	Mn	Si	S	P
Content (%)	0.43	0.74	0.22	0.023	0.030

 

45C8 Mechanical Properties:

PROPERTIES	METRIC	IMPERIAL
Tensile strength Ultimate	660 MPa	95700 psi
Tensile strength Yield	560 MPa	81200 psi
Bulk modulus (typical for steels)	140 GPa	20300 ksi
Shear modulus (typical for steels)	80 GPa	11600 ksi
Elastic modulus	190 – 210 GPa	19700- 30458 ksi
Poisson’s ratio	0.27 -0.30	0.27 – 0.30
Elongation at break (in 50 mm)	0.1	0.1
Reduction of area	0.4	0.4
Hardness, Brinell	197	197
Hardness, Knoop (converted from Brinell hardness)	219	219
Hardness, Rockwell B (converted from Brinell hardness)	92	92
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only)	13	13
Hardness, Vickers (converted from Brinell hardness)	207	207
Machinability (based on AISI 1212 steel. as 100 machinabilities)	55	55

 

45C8 Hardness:

197

 

45C8 Heat treatment:

 

45C8 Hardening:

820 – 860°C/Water, Oil

 

45C8 Tempering:

550 – 660°C/air

 

45C8 Physical Properties:

PROPERTIES	METRIC	IMPERIAL
Density	7.85 g/cm3	0.284 lb/in³

 

45C8 Thermal Properties:

PROPERTIES	METRIC	IMPERIAL
Thermal expansion co-efficient	11 µm/m°C	6.11 µin/in°F
Thermal conductivity	49.8 W/mK	346 BTU in/hr.ft².°F

 

45C8 Forging Properties:

1100 – 850°C/air

 

45C8 Stress Reliving:

 

45C8 Normalizing:

840 – 880°C

 

45C8 Annealing:

680 – 710°C/furnace

 

45C8 Density:

 

45C8 Machinability:

60 – 28

 

45C8 Welding:

• When welding is completed allow components to cool to 180°C before tempering

 

• Heat to 620 – 650°C at a maximum heating rate of 100°C/hr or 6000/thickness (mm) °C/hr, whichever is smaller. Temper for 2 hours. Cool to 200°C at a controlled cooling rate of 100°C/hr maximum. Cool to room temperature in still air. In very highly restrained conditions, it may be necessary to consider an intermediate, lower temperature stress relief treatment.

   

• If it is not convenient to hold the component at an intermediate temperature after welding, pending heating for tempering, the following alternative procedures (below) could be applied. However, if restraint is very high this alternative procedure may not prevent the occurrence of hydrogen-induced cracking.

   

  45C8 Alternative procedure:

   

• Boost the preheat to 250°C and hold for 4 hours minimum. 

 

• Cool to room temperature at a maximum rate of 50°C/hr.

   

• Temper when convenient.

 

Supply Cities:

Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Ranipet, Sivakasi, Karur, Hosur, Nagercoil, Kanchipuram, Karaikudi, Neyveli, Cuddalore, Kumbakonam, Thiruvannamalai, Pollachi, Rajapalayam, Gudiyatham, Pudukottai, Vaniyambadi, Ambur, Nagapattinam, Trivandrum, Vijayawada, Guntur, Thirupathi, Nazarathpet, Kakinada, Kurnool, Kadapa, Nizamabad, Mahabubnagar, Karimnagar.

 

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