Standard
ISO 898-1: Mechanical Properties of Fasteners
An overview of the ISO 898-1 standard specifying the mechanical and physical properties of bolts, screws, and studs made of carbon steel and alloy steel.
Scope of ISO 898-1
ISO 898-1 applies to bolts, screws, and studs with ISO metric thread evaluated at ambient temperatures (10°C to 35°C). It defines property classes such as 4.6, 8.8, 10.9, and 12.9.
Testing Methodologies
The standard outlines strict testing protocols including tensile testing under wedge loading, proof load testing, hardness testing, and decarburization tests to ensure structural integrity.