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Grade Introduction:
C55MN75 Carbon steels are steels having carbon as the major alloying element. They also contain up to 1.2% manganese and 0.4% silicon. In addition, residual elements like copper, molybdenum, aluminum, chromium, and nickel are present in these steels.
Grade Application:
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, 55C8, SAE 52100, S40C, S355J2G3.
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Chemical composition:
Mechanical Properties:
| PROPERTIES | METRIC | IMPERIAL |
| 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 |
Hardness:
Heat Treatment:
Hardening:
Tempering:
Physical Properties
| PROPERTIES | METRIC | IMPERIAL |
| Density | 7.85 g/cm 3 | 0.284 lb/in 3 |
Thermal Properties
Forging Properties:
Stress Relieving:
Normalizing:
Normalize at 1550° to 1625°F (843° to 885°C)
Annealing:
Full anneal at 1525° to 1600°F (829° to 871°C) before furnace cooling process anneal at 1100° to 1225°F (593° to 663°C) after cold working
Density:
| PROPERTIES | METRIC | IMPERIAL |
| Density | 7.85 g/cm3 | 0.284 lb/in3 |
Machinability:
Sulfured or chlorinated cutting oils for high-speed steel cutters
No oil for carbide-tip tools
Grind high-speed steel turning tools
8-12° side rake
6-10° back rake
7-9° side and end relief
12-16° side cutting-edge angle
8-14° end cutting-edge angle
Nose radius 10% of cut depth
Grind carbide-tip tools
6-12° side rake
2-8° back rake
6-10° side and end relief
8-12° end cutting-edge angle
8-16° side cutting-edge angel
1/32” nose radius
Welding:
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.
