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Proof load of stainless steel nuts, coarse thread

Steel nuts (coarse thread)ISO 898-2 (JIS B 1052-2)Unlike bolts, the proof stress rises with nominal diameter within the same property class.Steel nuts (fine thread)ISO 898-6 (JIS B 1052-6)並目ねじとは別の規格です。同じ強度区分でも応力が高く、使える呼び径の範囲も狭くなります。Stainless steel nuts (coarse thread)ISO 3506-2 (JIS B 1054-2)保証荷重応力は呼び径では変わらず、ナットの高さで 2 つに分かれます。Stainless steel nuts (fine thread)ISO 3506-2 (JIS B 1054-2)保証荷重応力は並目ねじと同じです。有効断面積が大きくなるぶん、保証荷重も大きくなります。
Thread designationProof load [N]
Proof stress
[N/mm2]

Notes

  • The proof load is the tensile stress area multiplied by the proof stress.The tensile stress area is calculated as given in JIS B 1082.The source has no proof load table。規格が定めているのは 保証荷重応力までです。
  • The source does not state how the standard height and the thin nut correspond.The standard defines only how to read the three digits: the leading 0 marks a thin nut, and the next two digits are one tenth of the proof stress.halving the stress and rounding down to a multiple of 50 gives exactly one pairing, so that is the order used here (F1 at 45 comes out as 200 rather than 225).
  • The values here are for room temperature.Mechanical properties change at high and low temperatures, so do not apply these values directly.
  • Sources: JIS B 1054-2, JIS B 0205-4, JIS B 1082
Proof load of stainless steel nuts, coarse thread | Updraft - Mechanical Engineering Calculators