International · ISO · SteelCurrent

ISO 898-1

Mechanical properties of fasteners made of carbon steel and alloy steel — Bolts, screws and studs

Property classes 4.6–12.9. First number × 100 = nominal tensile (MPa); second × 10 = yield/tensile ratio in %.

8 values on this site name a clause of this document.

Grades on Matipedia

ISO 898-1

Property class 8.8

The everyday structural bolt: 800 MPa tensile, 640 MPa yield (nominal). Minimums rise above 16 mm diameter.

ReH

≥ 640 MPa

Rm

≥ 800 MPa

Corroborated

1

Single source

6

ISO 898-1

Property class 10.9

High-strength structural bolt for preloaded joints: 1000 MPa tensile, 900 MPa yield (nominal).

ReH

≥ 940 MPa

Rm

≥ 1 040 MPa

Corroborated

1

Single source

4