What are some physical properties of the Finns

Mechanical and physical properties of screws

according to ISO 898, part 1

The mechanical properties of screws generally apply to tests at room temperature.

aValues ​​do not apply to structural steel screws.
bFor steel construction screws d ≥ M12.
cNominal values ​​are only specified for the designation system of the strength classes. See section 5.
dIf the lower yield point ReL cannot be determined, the 0.2% proof stress R is to be determinedp0.2 permissible.
eThe values ​​for Rpf min are examined for strength classes 4.8, 5.8 and 6.8. The current values ​​are only given for calculating the test voltage ratio. They are not test values.
fTest forces are specified in Tables F.006.
GThe hardness determined at the end of a screw may be a maximum of 250 HV, 238 HB or 99.5 HRB.
HThe surface hardness of the respective screw must not exceed 30 Vickers points of the measured core hardness if both the surface hardness and the core hardness are determined with HV 0.3.
iAn increase in surface hardness to over 390 HV is not permitted.
j An increase in surface hardness to over 435 HV is not permitted.
kThe values ​​are determined at a test temperature of - 20 ° C.
lApplies to d ≥ 16 mm.
mValues ​​for KV. are being researched.
nInstead of ISO 6157-1, ISO 6157-3 may apply by agreement between the manufacturer and the customer.