Mechanical Properties - Steel Screws and Bolts ISO 898-1 EN 20898-1
Property Class3.64.64.85.65.86.88.810.912.9<= 16mm> 16mmTensile Strengthnominal value30040040050050060080080010001200Rm in MPa (N/mm2)minimum33040042050052060080083010401220Vickers Hardnessminimum95120130155160190230255310372HV=F 98Nmaximum220220220220220250300336382434Brinell Hardnessminimum90114124147152181219242295353HB F=30D2maximum 209 238285319363412Rockwell Hardness HRminimum HRB526771798289 minimum HRC 20233138maximum HRB9595959595 maximum HRC 30343944Surface Hardnessmaximum 320356402454HV 0.3Yield Stressnominal value180240320300400480 Rel in MPa(N/mm2)minimum190240340300420480 0.2% elongation limitnominal value 6406409001080Rp0.2 in Mpa (N/mm2)minimum 6406609401100Test stress SpSp/ReL or Rp0.20.940.940.910.940.910.910.910.910.880.88MPA (N/mm2)180225310280380440580600830970Elongation after fractureminimum25221420108121298A5 in %
Breaking Torque ISO 898-7 DIN 267 pt 25
ThreadPitchProperty Class4.64.85.65.88.810.912.9Breaking Torque (Nm) MinimumM10.250.020.020.0240.0240.0330.040.045M1.20.250.0450.0460.0540.0550.0750.0920.1M1.40.30.070.0730.0840.0870.120.140.16M1.60.350.0980.10.120.120.160.20.22M20.40.220.230.260.270.370.450.5M2.50.450.490.510.590.60.8211.1M30.50.920.961.11.11.51.92.1M3.50.61.41.51.71.82.433.3M40.72.12.22.52.63.64.44.9M50.84.54.75.55.67.69.310M617.67.99.19.4131617M7114141617232831M81.2519202324334044M101.539414749668190
A572 Grade 50 Mechanical Requirements
GradeYield, min ksiTensile, min ksiElongation, min % in 8”Elongation, min % in 2”5050651821
