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Grade Introduction:
55C8 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, the residual elements such as copper, molybdenum, aluminum, chromium, and nickel are present in these steels.
55C8 is a water resisting carbon steel whose wear resistance and hardenability are increased by the addition of a small quantity of chromium.
Grade Application:
  • Levers
  • Bolts
  • Nuts
  • Studs
Equivalent grades:
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, OHNS, HCHCR, D2, D3, H-11, H-13, CW-1, M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, C55MN75, SAE 52100, S40C, S355J2G3.
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Chemical composition:
The following table shows the chemical composition of 55C8 steel:
Element C Mn Si S P
Content (%) 0.310 – 0.380 0.60 – 0.90 98.63 – 99.09 0.050 Max 0.040 Max
Mechanical Properties:
Tensile strength, ultimate 585 MPa 84800 psi
Tensile strength, yield 370 MPa 53700 psi
Modulus of elasticity 190-210 GPa 29700-30458 ksi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Poissons ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 0.3 0.3
Reduction of area 0.53 0.53
Hardness, Brinell 183 183
Hardness, Knoop (converted from Brinell hardness) 204 204
Hardness, Rockwell B (converted from Brinell hardness) 89 89
Hardness, Vickers (converted from Brinell hardness) 192 192
Machinability (based on AISI 1212 steel. as 100 machinability) 65 65
Heat treatment:
Physical Properties:
Density 7.85 g/cm 3 0.284 lb/in 3
Thermal Properties:
Thermal expansion co-efficient (@20°C/68°F) 11 µm/m°C 6.11 µin/in°F
Thermal conductivity 51.9 W/mK 360 BTU in/hr.ft 2 .°F
Forging Properties:
Stress Reliving:
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.
Metal Weight Calculator:
Calulated Weight: 0 Kgs / 0 Lbs