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Tensile Strength
Tensile Strength Unit : N/mm² ,Kgf/mm² , Mpa,
1Kgf/mm²=9.80N/mm²
1N/mm²=1Mpa
1Mpa=1N/mm²=0.102Kgf/mm²
Grade8.8=700N/mm² tensile strength=7T HRC28~32
Grade10.9=1000N/mm² tensile strength=9T HRC33~39