Transcription of Mechanical Properties of Bolts, Screws and Studs
1 00 40 0. 3 footnote(5) Proof load value Sp in N/m m 18022 531 028038044058060065083097010El ongationafter fracture,A strength, sound nes sno , Unit C1 Hortonwood 10 Telfo rd, ShropshireTF1 7ES, UnitedKing domTel. +44 (0 )19526767 00 Fa x. +44 (0) 19526768 00Em ail. anical Pro pertiesTensile stre ng th (4)Rm MPaVicker s hard nessHV (F/98 N)2134678111415 Brine ll har dnes sHB (F=30 D )Rockwellhard ness HRLow er yield st res sRe l N/mm (6) yield st reng thRp N/mm Proo f st rength rat ioStreng th und er wed ge load ingMinimumheight of non-decarburisedthread zone, 2 H12/ 3 H1 3/ 4 H1 Maximumdep th of completedecarburisation,G mmThe values for ful l si ze bolts and sc rews (no t Studs ) shall no t be smallerthan theminim um val ues for te nsile show n in (1) (3) 10. 9 M16>M1 6(2) M16 SPr/Re l orSP/Rp 4 920.
2 1 For class in diameter d = 16mm there is an inc reasedris k of nut st rippingin the case of inadvertentover-t ighteningind ucing a load in excessof pr oof ing load . Reference to ISO 898- 2 isre For structuralbol ting the limit is 12mm .3. Appliesonl y to no minal thre ad diameterd = 16mm .4. Minimumtensile proper ties apply to prod ucts of nominallength l = 2,5 d. Minimumhardness appliesto productsof l < 2,5 d and other prod uc ts, which cannot be tensile-teste d ( . due tohead configuration).5. Surfac e ha rdness shall not be more than 30 Vickerspoints abov e the measuredcore hardness on the productreadingsof both sur face and co re are carriedout at HV 0,3. For class 10 .9maximumsurfacehardness= 390 In cases where the lowe r yie ld stress Rel cannot be de termined,it is permissibleto measurethe proof stress Rp0,2.
