15Cr3 is a steel grade renowned for its excellent combination of chemical composition, mechanical properties, and versatile applications. This webpage provides a comprehensive overview of 15Cr3 steel, covering its country of origin, standard and specification, chemical composition, mechanical and physical properties, equivalent grades in various international standards, applications, heat treatment processes, size ranges, and available sections.
Country, Standard, and Specification:
15Cr3 steel is primarily produced in India and is governed by the IS (Indian Standard) specification, IS 5517:1993. This standard defines the requirements for alloy steel suitable for various engineering applications.
Chemical Composition:
The chemical composition of 15Cr3 steel typically includes:
- Carbon (C): 0.12-0.18%
- Manganese (Mn): 0.40-0.60%
- Silicon (Si): 0.15-0.35%
- Phosphorus (P): 0.035% max
- Sulfur (S): 0.035% max
- Chromium (Cr): 0.80-1.10%
Mechanical & Physical Properties:
15Cr3 exhibits the following mechanical properties:
- Tensile Strength: 670-820 MPa
- Yield Strength: 470-520 MPa
- Elongation: 20-28%
- Hardness: 170-230 HB
The physical properties include a density of approximately 7.85 g/cm³.
Equivalent Steel Grades:
15Cr3 can be equated with various steel grades in different international standards:
- BS (British Standard): 523M15
- AISI/SAE (American Iron and Steel Institute): 5115
- DIN (Deutsches Institut für Normung): 15Cr3
- Werkstoff No.: 1.7015
- EN (European Norm): 16MnCr5
- AFNOR (Association Française de Normalisation): 16MC5
- JIS (Japanese Industrial Standards): SCM415
- GOST (Gosudarstvennyy Standart): 15Kh
Application & Uses:
15Cr3 steel finds its application in various sectors, such as automotive, manufacturing, and construction. It is commonly used for components like gears, shafts, axles, and machine parts that require good strength and wear resistance.
Heat Treatment Process:
To enhance its mechanical properties, 15Cr3 steel undergoes heat treatment processes such as:
- Annealing: Heating to 840-870°C, followed by slow cooling in a furnace to relieve internal stress.
- Normalizing: Heating to 870-890°C, followed by air cooling to improve the material's machinability.
- Quenching and Tempering: After quenching in oil or water, the steel is tempered by reheating to 150-250°C, enhancing hardness and toughness.
Size Ranges & Sections:
15Cr3 steel is available in various forms, including:
- Rounds: Diameter ranges typically from 12mm to 80mm.
- Squares: Side lengths usually range from 10mm to 60mm.
- Flats: Widths range from 30mm to 150mm, with thicknesses of 5mm to 25mm.
- Hexagons: Across flats vary from 10mm to 50mm.
- Billets: Typically, these are square sections with side lengths of 125mm to 160mm.
In conclusion, 15Cr3 steel is a versatile material known for its well-balanced properties, making it suitable for a wide range of applications. Its equivalency to various international standards ensures its availability and usability in different regions. Whether you're in the automotive, manufacturing, or construction industry, 15Cr3 steel can be a reliable choice, especially when properly heat-treated to meet specific requirements.