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Gray Iron


Gray iron is a common cast iron material with the following advantages, disadvantages, and mechanical property range:

1. Good castability: Gray iron has good fluidity and pourability, making it easy to cast complex shapes and large components.

2. Excellent damping properties: Gray iron exhibits high damping and vibration absorption capabilities, effectively reducing vibration and noise. It is suitable for manufacturing mechanical parts and industrial equipment.

3. Good wear resistance: Gray iron has good wear resistance, making it suitable for components subjected to wear and friction, such as brake discs and friction plates.

4. Lower cost: Gray iron is a cost-effective casting material compared to other materials.

1. Lower strength and toughness: Gray iron has lower strength and toughness, making it unsuitable for applications that require high strength and impact loads.

2. Susceptible to cracking: Gray iron can experience cracking due to thermal stresses during cooling processes, attributed to its mechanical property non-uniformity.

3. Higher brittleness: Gray iron has higher brittleness compared to other metallic materials, making it prone to fracture.

Mechanical property range:
The mechanical properties of gray iron are influenced by specific compositions and process treatments. Generally, here is the mechanical property range of gray iron:

– Tensile strength: Typically in the range of 100-350 MPa.
– Yield strength: Typically in the range of 40-250 MPa.
– Elongation: Generally low, typically between 0.5-2%.
– Impact toughness: Relatively low, prone to fracture.
– Hardness: Typically in the range of 150-250 HB (Brinell hardness).

It is important to note that specific mechanical property ranges may vary depending on different standards, applications, and metallurgical processes.

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