High Tensile Bolts: Comparing Grade 8.8 and 10.9

Defining Tensile Strength

Bolt 'Grades' indicate the strength and hardness of the material. For high-tensile applications, Grade 8.8 and 10.9 are the standard.

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Grade 8.8 (The Structural Workhorse)

- **Tensile Strength:** 800 N/mm² - **Yield Strength:** 640 N/mm² - **Common Use:** General structural steelwork and heavy-duty repairs.

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Grade 10.9 (The High-Strength Solution)

- **Tensile Strength:** 1000 N/mm² - **Yield Strength:** 900 N/mm² - **Common Use:** Engine bolts, automotive components, and bridge construction.