Ventura Alloy And Steels Private Limited

SAE 1018 is a low carbon steel grade known for its excellent weldability, machinability, and ductility. It provides a good balance of strength and toughness and is widely used in applications requiring moderate strength and good surface finish. It can also be case-hardened for improved wear resistance while maintaining a tough core.

Chemical Composition (Typical %):

• Carbon (C): 0.15 – 0.20%

• Manganese (Mn): 0.60 – 0.90%

• Phosphorus (P): ≤ 0.040%

• Sulphur (S): ≤ 0.050%

• Iron (Fe): Balance

Mechanical Properties (Approximate):

• Tensile Strength: 440 – 470 MPa

• Yield Strength: ~370 MPa

• Hardness (Brinell): 126 – 137 HB

• Elongation: ~15 – 20%

• Density: 7.87 g/cm³

Key Properties:

• Excellent machinability and weldability

• Good toughness and ductility

• Can be case hardened for wear resistance

• Smooth surface finish suitable for bright bar applications

Heat Treatment:

• Carburizing Temperature: 880 – 920°C

• Hardening Temperature: 780 – 830°C (Water or oil quench)

• Tempering Temperature: 150 – 200°C

Applications:

• Shafts and axles

• Pins, studs, and spindles

• Machine parts and fasteners

• Case-hardened components

• Bright bars and cold-drawn products

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