Chemical Composition:
The chemical composition of A681-08(2015) steel grade is as follows:
– Carbon (C): 0.35 – 0.40%
– Chromium (Cr): 0.70 – 1.00%
– Manganese (Mn): 0.20 – 0.60%
– Silicon (Si): 0.10 – 0.60%
– Molybdenum (Mo): 0.20 – 0.60%
– Vanadium (V): 0.15 – 0.30%
Other elements such as sulfur (S) and phosphorus (P) may also be present in small amounts.
Mechanical Properties:
A681-08(2015) steel grade exhibits the following mechanical properties:
– Tensile Strength: 880 – 1870 MPa (depending on heat treatment)
– Yield Strength: 630 – 1450 MPa (depending on heat treatment)
– Elongation: 14 – 28%
– Hardness: 58 – 64 HRC (Rockwell C Scale)
Standard Number:
A681-08(2015) is the standard number for this steel grade. This standard was published in 2015 and provides guidelines for the chemical composition, heat treatment, and mechanical properties of tool steels.
Applications:
Due to its high strength and hardness, A681-08(2015) steel grade is commonly used in various applications, including:
1. Cutting and forming tools: It is used to manufacture cutting tools, such as drills, end mills, taps, and saw blades, as well as forming tools like dies and punches.
2. Machine components: A681-08(2015) steel grade is used to produce machine components that require high wear resistance, such as gears, shafts, and bearings.
3. Molds: The high hardness of this steel grade makes it suitable for manufacturing molds used in various industries, including plastics, rubber, and metal fabrication.
4. Automotive industry: A681-08(2015) steel grade finds application in the automotive industry, particularly in the production of engine components, transmission parts, and suspension systems.
5. Aerospace industry: Due to its excellent strength and fatigue resistance, this steel grade is used in the construction of aircraft components, including landing gears and structural parts.
In summary, A681-08(2015) steel grade is a versatile tool steel that offers high strength, hardness, and wear resistance. It finds applications in various industries, including cutting tools, machine components, molds, automotive, and aerospace sectors.