T = (0,5 ~ 0,7) * k * σs * As * d / 1000 Under harren, T: tightening koppel, Nm k: tightening krêft koëffisjint, meastentiids 0,12 σs: bout materiaal opbringst sterkte, Mpa As: gefaarlik Cross-sectional gebiet, mm2 d: Nominale diameter, mm Hebei Chengyi Engineering Materials Co., Ltd.
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