Ventura Alloy And Steels Private Limited

C45 is a medium carbon steel grade known for its good strength, hardness, and machinability. It can be heat-treated (through hardening and tempering) to achieve higher mechanical properties. C45 offers an excellent balance between strength and toughness, making it suitable for general engineering applications.

Chemical Composition (Typical %):

• Carbon (C): 0.42 – 0.50%

• Manganese (Mn): 0.50 – 0.80%

• Silicon (Si): 0.10 – 0.40%

• Phosphorus (P): ≤ 0.040%

• Sulphur (S): ≤ 0.040%

Mechanical Properties (Approximate):

• Tensile Strength (normalized): 570 – 700 MPa

• Yield Strength: ~355 MPa

• Hardness (Annealed): 170 – 210 HB

• Hardness (Hardened & Tempered): up to 55 HRC

• Elongation: 16%

Heat Treatment:

• Normalizing: 840 – 880°C

• Hardening: 820 – 860°C (Oil or water quench)

• Tempering: 540 – 680°C (to desired hardness)

Key Properties:

• Good machinability and workability

• Can be flame or induction hardened

• Moderate tensile strength with good impact resistance

• Readily weldable (with proper preheating)

Applications:

• Shafts and axles

• Studs, bolts, and nuts

• Gears and crankshafts

• Couplings and keys

• Machine parts and tools

SAE 1141 is a medium carbon, manganese steel with added sulphur to improve machinability. It is categorized as a free-machining steel, making it ideal for producing precision components with high-speed machining operations. This grade offers a good balance of strength, hardness, and machinability, and can be heat-treated for additional strength and wear resistance.

Chemical Composition (Typical %):

• Carbon (C): 0.37 – 0.45%

• Manganese (Mn): 1.35 – 1.65%

• Phosphorus (P): ≤ 0.040%

• Sulphur (S): 0.08 – 0.13%

• Iron (Fe): Balance

Mechanical Properties (Approximate):

• Tensile Strength: 620 – 760 MPa

• Yield Strength: ~415 MPa

• Hardness (Brinell): 170 – 220 HB (annealed)

• Elongation: 20%

• Density: 7.85 g/cm³

Key Features:

• Excellent machinability due to higher sulphur content

• Good strength and toughness

• Can be hardened and tempered

• Suitable for repetitive machining and production runs

• Not recommended for welding due to sulphur content

Heat Treatment:

• Annealing: 845°C, slow furnace cooling

• Normalizing: 870 – 900°C, air cool

• Hardening: 830 – 860°C, oil quench

• Tempering: 425 – 650°C (depending on desired hardness)

Applications:

• Shafts and axles

• Studs, bolts, and pins

• Machined components and fittings

• Automotive parts and fasteners

• Gears and couplings