1. Key Properties:
High Strength: SAE 4150 is a high-strength, low-alloy steel, offering superior tensile and yield strength, making it suitable for high-stress applications.
Good Toughness: SAE 4150 exhibits excellent toughness, which makes it resistant to impact and shock loading, especially in tough operating environments.
Good Wear Resistance: This steel grade has good wear resistance, making it ideal for components exposed to friction, abrasion, and high-stress conditions.
Weldability: SAE 4150 has good weldability, but for thicker sections, preheating and post-weld heat treatment may be necessary to prevent cracking and ensure optimal results.
Heat Treatable: SAE 4150 can be heat-treated to enhance hardness, strength, and durability, offering versatility in different applications.
Corrosion Resistance: Offers moderate resistance to corrosion; however, coatings or surface treatments may be needed for harsher environments or aggressive media.
2. Applications/Industries:
Automotive: SAE 4150 is commonly used for making high-performance automotive parts, such as gears, axles, crankshafts, and other components that experience high loads and stresses.
Oil & Gas: This steel grade is utilized in the oil and gas industry for manufacturing drill pipes, pressure vessels, and various critical equipment exposed to high pressure and harsh conditions.
Heavy Machinery: Ideal for parts like shafts, gears, and pressure vessels in heavy machinery, mining, and construction equipment, where high strength and resistance to wear are essential.
Military: Used in military applications for producing durable and high-strength parts, including gun barrels, armored vehicle components, and military tools.
Aerospace: SAE 4150 is used for aerospace parts, particularly those requiring high strength, such as landing gears, turbine engine components, and structural elements.
3. Certifications/Standards:
SAE J403: SAE 4150 conforms to the SAE J403 standard for alloy steels, ensuring it meets required mechanical properties and chemical composition.
ASTM A519: This standard applies to seamless carbon and alloy steel mechanical tubing, which is relevant for SAE 4150 seamless pipes.
ISO 9001: Quality management system certification.
4. Chemical Composition:
Carbon (C): 0.48% – 0.53%
Manganese (Mn): 0.60% – 0.90%
Chromium (Cr): 0.80% – 1.10%
Molybdenum (Mo): 0.15% – 0.25%
Silicon (Si): 0.20% – 0.35%
Phosphorus (P): 0.035% max
Sulfur (S): 0.035% max
Iron (Fe): Balance
5. Technical Specifications:
Yield Strength:
SAE 4150: 450 MPa (minimum)
Tensile Strength:
SAE 4150: 650–900 MPa
Hardness:
SAE 4150: Approximately 200–285 HB (Brinell hardness)