[ Mechanical Properties requirements (Ref. DIN EN ISO 3506) ]
Group
Grade
Property Class
Thread Diameter Range
Tensile Strength RM (1) Min N/MM2
Stress Permanent Strain Rp 0.2 (1) Min N/MM2
Elongationn after Fracture A(2) Min MM
Austentic
304/316
50
<39
500
210
0.6d
70
<M24
700
450
0.4d
80
<M24
800
600
0.3d
The tensile stress is calculated on the stress area.
To be determined according to test methods on actual screw length and on a prepared test piece is the nominal thread diameter
All tensile stress values are calculated and reported in terms of the nominal tensile stress area of the thread.
The extension measurements are determined in accordance with the test procedure and are on the actual screw or bolt length and not on a prepared test piece gauge length of 5 d of the test piece.
