EN ISO 3506-1 Table 2 - Mechanical Properties for Bolts, Screws and Suds - Austenitic Grades

Group Grade Property class Thread diameter range Tensile strength Rm min. N/mm2 Stress at 0.2% permanent strain Rp0.2 min N/mm2 Elongation after fracture A min. mm Austenitic A1, A2, 50 ≤ M39 500 210 0.6d A3, A4, 70 ≤ M24 700 450 0.4d A5 80 ≤ M24 800 600 0.3d

EN ISO 3506-1 Table 3 - Mechanical Properties for Bbolts, Screws and Studs - Martensitic a nd Ferritic Grades

Group Grade Property class Tensile strength Rm min. N/mm2 Stress at 0.2% Elongation after Hardness permanent strain fracture Rp0.2 min A min. N/mm2 mm HB HRC HV Martensitic C1 50 500 250 0.2d 147 to 209   155 to 220 70 700 410 0.2d 209 to 314 20 to 34 220 to 330 110 1 100 820 0.2d   36 to 45 350 to 440 C3 80 800 640 0.2d 228 to 323 21 to 35 240 to 340 C4 50 500 250 0.2d 147 to 209   155 to 220 70 700 410 0.2d 209 to 314 20 to 34 220 to 330 Ferritic F1 45 450 250 0.2d 128 to 209   135 to 220 60 600 410 0.2d 171 to 271   180 to 285