Bolting Material Strength


Tensile and Proof Stress of Metric Bolts and Screws, note units Newton/mm2.

Carbon Steel

Strength Designation 3.6 4.6 4.8 5.6 5.8 6.8 8.8
=< 16mm
8.8
> 16
9.8 10.9 12.9
Nom. Tensile Strength 300 400 400 500 500 600 800 800 900 1000 1200
Min Tensile Strength 330 400 420 500 520 600 800 830 900 1000 1200
Lower Yield Stress 180/190 240 320/340 300 400/420 480 - - - - -
Stress at Perm. Set - - - - - - 640 640/660 720 900/940 1080/100

Tensile Strength of Metric Nuts

Strength Designation 4 5 6 8 10 12
Tensile Strength 400 500 600 800 1000 1200

Stainless Steel Bolts and Screws

Stainless Steel Austenitic Martensitic Ferritic
Steel Grade A1, A2, A3, A4, A5 C1,C4 C1 C3 F1
Strength class 50 70 80 100 50 70 110 80 45 60
Tensile Strength 500 700 800 1000 500 700 1100 800 450 600
0,2% proof stress 210 450 600 750 250 410 820 640 250 410

Note provided for information only, information has not been checked by an independent source, therefore if you use this information you do so at your risk.