1. Key Properties:
High Strength: SAE 4115 is a low alloy steel with excellent tensile and yield strength, making it suitable for high-pressure and demanding applications.
Good Toughness: It offers good toughness, allowing the material to perform well under stress and in impact situations.
Weldability: This steel has good weldability, allowing it to be used in construction and repair of complex structures.
Corrosion Resistance: Offers moderate resistance to corrosion, making it suitable for outdoor and industrial environments.
Heat Treatable: SAE 4115 can be heat treated to further increase its hardness and strength, providing flexibility for specific applications.
2. Applications/Industries:
Automotive: Used in manufacturing parts that require high strength, such as gears, shafts, and axles.
Heavy Machinery: Ideal for parts that undergo heavy wear and need good strength and toughness, like structural components, pistons, and rods.
Oil & Gas: Suitable for pipelines and drilling equipment in the oil and gas industry, where high pressure and demanding conditions are common.
Aerospace: Used in non-critical components that require high strength and resistance to wear, such as engine parts and structural components.
Hydraulic Systems: Commonly used for producing components like hydraulic cylinders, pistons, and rods.
3. Certifications/Standards:
SAE J403: SAE 4115 meets the requirements outlined in the SAE J403 standard for alloy steels.
ASTM A519: This specification covers seamless carbon and alloy steel mechanical tubing, applicable to SAE 4115.
ISO 9001: Quality management system certification.
4. Chemical Composition:
Carbon (C): 0.15% – 0.20%
Manganese (Mn): 0.60% – 0.90%
Chromium (Cr): 0.80% – 1.10%
Molybdenum (Mo): 0.15% – 0.25%
Silicon (Si): 0.20% max
Phosphorus (P): 0.035% max
Sulfur (S): 0.035% max
Iron (Fe): Balance
5. Technical Specifications:
Yield Strength:
SAE 4115: 415 MPa (minimum)
Tensile Strength:
SAE 4115: 585–735 MPa
Hardness:
SAE 4115: Approximately 197–255 HB (Brinell hardness)