📋 Bolt Grades Reference

Property classes 4.6 – 12.9 · fyb, fub, hardness, proof load · ISO 898-1

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All grades — comparison

Tensile stress area As — M1 to M36

Notes

Grade designation system

The two numbers of the property class code:

  • 1st number × 100 = fub,min [MPa]
  • 1st × 2nd × 10 = fyb,min [MPa]