Description
IS 40Ni6Cr4Mo3 Round Bar / T40Ni6Cr4Mo3 / TAC 15
40Ni6Cr4Mo3 Round Bar is a High Strength Nickel Chromium Molybdenum Alloy Steel Bars available in various sizes, finishes and conditions.
40Ni6Cr4Mo3 Round Bar is a Heat-Treatable Nickel Chromium Molybdenum Alloy Steel known for its combination of high strength, toughness and fatigue resistance. The grade is used for demanding engineering and automotive applications where strength and hardenability are important. IS 9175 Part 28 specifically covers the mechanical properties, hardenability and transformation characteristics of 40Ni6Cr4Mo3 grade steel for automobile and ancillary applications.
40Ni6Cr4Mo3 Chemical Composition :
| Elements | IS 5517 | IS 9175 Part 28 | IS 1570 Part 6 | |||
| 40Ni6Cr4Mo3 | 40Ni6Cr4Mo3 | TAC15 / TAC 15 | ||||
| IS 3748 | ||||||
| T40Ni6Cr4Mo3 | ||||||
| Min. | Max. | Min. | Max. | Min. | Max. | |
| C | 0.35 | 0.45 | 0.35 | 0.44 | 0.35 | 0.45 |
| Si | 0.10 | 0.35 | 0.10 | 0.35 | 0.10 | 0.35 |
| Mn | 0.40 | 0.70 | 0.40 | 0.70 | 0.40 | 0.70 |
| Ni | 1.25 | 1.75 | 1.25 | 1.75 | 1.25 | 1.75 |
| Cr | 0.90 | 1.30 | 0.90 | 1.30 | 0.90 | 1.30 |
| Mo | 0.20 | 0.35 | 0.20 | 0.35 | 0.20 | 0.35 |
| S | – | 0.035 | – | 0.035 | – | 0.035 |
| P | – | 0.035 | – | 0.035 | – | 0.035 |
• IS 40Ni6Cr4Mo3 Round Bars
• IS 5517 40Ni6Cr4Mo3 Round Bars
• IS 9175 Part 28 40Ni6Cr4Mo3 Round Bars
• IS 1570 Part 6 TAC15 / TAC 15 Round Bars
• IS 1570 Part 6 T40Ni6Cr4Mo3 Round Bars
• IS 3748 T40Ni6Cr4Mo3 Round Bars
Hardness of 40Ni6Cr4Mo3 :
The maximum hardness for this grade of steel delivered in the annealed condition when determined in accordance with IS : 1500-1983 shall be 277 HB / 255 HB Max.
Indian Standard :
- • IS 5517 (1993) : Steels for Hardening and Tempering
- • IS 3748 (1990) : Tool and Die Steels
- • IS 1570-6 (1996) : Schedules for Wrought Steels, Part 6: Carbon and Alloy Tool Steels
- • IS 9175-28 (1987) : Rationalized Steels for Automobile and Ancillary Industry, Mechanical and Physical Properties, Part 28 40Ni6Cr4Mo3 Grade steel
Applications of 40Ni6Cr4Mo3 Round Bar :
40Ni6Cr4Mo3 steel is a High-Strength Nickel-Chromium-Molybdenum Alloy Steel commonly used for components requiring high tensile strength, toughness, fatigue resistance, and good hardenability.
Key applications include:
• Automotive components – axles, shafts, crankshafts and connecting components
• Gears and gear shafts – heavy-duty transmission and drive systems
• Drive shafts and propeller shafts
• Crankshafts and camshafts
• Pinions and sprockets
• Bolts, studs and high-strength fasteners
• Spindles and machine shafts
• Bushes and pins
• Forged engineering components
• Heavy machinery components
• Mining and earthmoving equipment
• Oil & gas equipment components
• Power transmission components
• Diesel engine components
• Hydraulic and mechanical equipment parts
