Mechanical properties:
– Tensile strength: 100,000 – 125,000 psi
– Yield strength: 85,000 – 100,000 psi
– Elongation: 16-20%
– Hardness: 17-22 HRC
Technical properties:
– Good fatigue resistance
– Excellent impact strength
– High toughness
– Good weldability
Chemical composition:
– Carbon: 0.14-0.20%
– Manganese: 1.20-1.50%
– Silicon: 0.20-0.35%
– Phosphorus: 0.030% max
– Sulfur: 0.030% max
– Chromium: 0.90-1.10%
– Nickel: 0.40-0.60%
– Molybdenum: 0.15-0.25%
Uses:
The 311-Type 7 steel grade is commonly used in the manufacturing of structural components, such as gears, shafts, and axles, as well as in the construction of machinery and equipment. Its high strength and toughness make it suitable for demanding applications in the automotive, aerospace, and construction industries.
Overall, the 311-Type 7 steel grade offers a combination of mechanical properties and chemical composition that make it a versatile and reliable material for a wide range of industrial applications. Its high strength and toughness make it a popular choice for use in demanding environments where durability and performance are essential.
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