Material properties - Steel Screws and Bolts - ISO 898 pt 1 EN 20898 pt 1

 
Property class Material/treatment Chemical composition (%)
C (max.) P (max.) S (max.)
4.6, 4.8 Carbon steel 0.55 0.05 0.06
8.8 Carbon Steel (+ Bn, Mn or Cr) quenched and tempered 0.4 0.035 0.035
8.8 Carbon Steel quenched and tempered 0.55 0.035 0.035
10.9* Carbon Steel (+ Bn, Mn or Cr) quenched and tempered 0.35 0.035 0.035
10.9 Carbon Steel quenched and tempered 0.55 0.035 0.035
10.9 Carbon Steel (+ Bn, Mn or Cr) quenched and tempered 0.55 0.035 0.035
10.9 Alloyed steel quenched and tempered 0.55 0.035 0.035
12.9 Alloyed steel quenched and tempered 0.5 0.035 0.035