40C8

Grade Introduction:
40C8 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.

Grade Application

C40 Steel material is suitable for all general engineering applications requiring a higher strength than mild steel such as:

  • General Purpose Axles
  • Shafts
  • Gears
  • Bolts and Studs
  • Spindles
  • Automotive and General Engineering Components
  • General Engineering Parts etc.

Equivalent Grades

Classification IS EN DIN AISI/SAE JIS
Medium Carbon Steel 30C8,35C8,40C8,45C8,50C8, 55C8, CL-III, CL-IV, CL-V EN-8, EN-8D, EN-9 CK-30, CK-35, CK-40, CK-45, CK-50, CK-55, CK-60 1030 1035 1040 1045 1050 1055 1060 –

Our Supply Range

We supply to automotive ancillaries and OEM customers. The products we manufacture are used as input for manufacturing of automotive and general engineering components. These components are further assembled into systems fitted in automobiles and other engineering applications.

Product Type Size Range
Forged Round Bars 140mm Dia to 850mm
Rolled Round Bars 16mm Dia and above
Forged Flat Bars Thickness: 32mm to 510mm, Width: 65mm to 1050mm
Rolled Flat Bars Thickness: 6mm to 110mm, Width: 25mm to 510mm

Chemical Composition

The following table shows the chemical composition of 40C8 steel:

Element C Mn Si S P
Content (%) 0.35 – 0.45 0.60 – 0.90 0.10 – 0.35 0.35 Max 0.35 Max

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 machinability) 55 55

Hardness

197

Heat Treatment

1611°C – 1367°C

Tempering

550°C – 660°C

Normalizing

Normalizing of 40C8 bright mild steel takes place at 830-860°C (1526°F-1580°F) then it is cooled in air.

Annealing

680 – 710°C

Physical Properties

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

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

Forging Properties

Preheat the 40C8 steel carefully, then raise temperature to 1050°C for forging. Do not forge below 850°C. After forging cool 40C8 steel slowly, preferably in a furnace.

Supply Cities

Ambattur, Bangalore, Chennai, Coimbatore, Dindigul, Guindy, Madurai, Nellore, Hyderabad, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Kanyakumari, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Karur, Nagercoil, Kanchipuram, Karaikudi, Pudukottai, Nagapattinam.

People also search as

40C8 Steel Round Bar, 40C8 Steel Round Bar Manufacturers, 40C8 Steel Suppliers, 40C8 Stockist, 40C8 Steel Dealers, 40C8 Steel Distributors, 40C8 Wholesalers, 40C8 Steel Traders, 40C8 Steel Square Distributors, 40C8 Steel Flat Bar, 40C8 Steel Companies Near me.

40C8, 40C8 Steel, 40C8 Chemical composition, 40C8 Mechanical properties, 40C8 Equivalent Grades, 40C8 Steel plate, 40C8 Steel sheet, 40C8 Manufacturers, 40C8 Suppliers, 40C8 Dealers, 40C8 Stockist, 40C8 Distributors, 40C8 Wholesalers, 40C8 Traders.

Addition to other grades

MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, DIN1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTMSA-105, SAE1018, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.