Torque & tensile data - Non-ferrous fasteners

Non Ferrous Materials according to ISO 8839

DIN NoMaterialNominal Thread Diameter dTensile strength Rm min. N/mm2Stress at permanent set limit Rp 0.2 min. N/mm2Elongation after fracture A min. (%)
SymbolAbbrev.Designation (Former)
2.0321CU2CuZn37Brass (Ms 63)d ≤ M644034011
M6< d ≥ M3937025019
2.0401CU3CuZn39Pb3Brass (Ms 58)d ≤ M644034011
M6< d ≥ M3937025019
2.102CU4CuSn6Resistind ≤ M1247034022
M12< d ≥ M3940020033
2.0853CU5CuNiSiKuprodurd ≤ M3959054012
2.3535AL1AIMg3 d ≤ M102702303
2501804
M10< d ≥ M39
3.2315AL3AISi1MgMn d ≤ M63202507
M6< d ≥ M3931026010

Minimum Breaking Loads according to ISO 8839

ThreadThread Pitch P (mm)Nominal stress area as mm2Symbols for materials
CU2CU3CU4CU5AL1AL3
Min. breaking loads (for nuts : proof load ** As x Rm  (N)
M30.55.03221022102360297013601610
M3.50.66.78298029803190400018302170
M40.78.78386038604130518023702810
M50.814.2625062506670838038304540
M6120.18840884094501186054306430
M7128.91069010690135801705078008960
M81.2536.613540135401720021500988011350
M101.558214602146027260342201566017980
M121.7584.3311903119039620497402108026130
M142115425504255046000678502875035650
M162157580005800062800926303925048670
M182.51927104071040768001133004800059520
M202.52459065090650980001445006125075950

** The tensile test for whole full size bolts according to ISO 898 - 1 must be carried out.

Min. Fracture Torque for screws up to M5 according to ISO 8839

Thread dSymbols for materials
CU2CU3CU4CU5AL1AL3
Min. breaking Torque ** (Nm)
M1.60.10.10.110.140.060.08
M20.210.210.230.280.130.16
M2.50.450.450.50.60.270.3
M30.80.80.91.10.50.6
M3.51.31.31.41.70.80.9
M41.91.922.51.11.4
M53.83.84.15.12.42.8

** The torsional strength test according to ISO 898-1 must be carried out

Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.