BS EN ISO 898-1:2009 Mechanical properties of fasteners made of carbon steel and alloy steel. Bolts, screws and studs with specified property classes. Coarse thread and fine pitch thread
BS EN ISO 898-1 specifies mechanical and physical properties of bolts, screws and studs made of carbon steel and alloy steel when tested at an ambient temperature range of 10 °C to 35 °C. They might not retain the specified mechanical and physical properties at higher or lower temperatures.
BS EN ISO 898-1 applies to bolts, screws and studs:
a) Made of carbon steel or alloy steel
b) Having triangular ISO metric screw thread according to ISO 68-1
c) With coarse pitch thread M1,6 to M39, and fine pitch thread M8×1 to M39×3
d) With diameter/pitch combinations according to ISO 261 and ISO 262
e) Having thread tolerances according to ISO 965-1, ISO 965-2 and ISO 965-4
It does not apply to set screws and similar threaded fasteners not under tensile stresses (see ISO 898-5).
It does not specify requirements for such properties as:
- Weldability
- Corrosion resistance
- Resistance to shear stress
- Torque/clamp force performance
- Fatigue resistance.
Contents of BS EN ISO 898-1:
- Foreword
- Scope
- Normative references
- Terms and definitions
- Symbols and abbreviated terms
- Designation system for property classes
- Materials
- Mechanical and physical properties
- Applicability of test methods
- General
- Loadability of fasteners
- Manufacturer's control
- Supplier's control
- Purchaser's control
- Feasible tests for groups of fasteners and machined test pieces
- Test methods
- Tensile test under wedge loading of finished bolts and screws (excluding studs)
- Tensile test for finished bolts, screws and studs for determination of tensile strength, Rm
- Tensile test for full-size bolts, screws and studs for determination of elongation after
- fracture, Af, and stress at 0,004 8 d non-proportional elongation, Rpf
- Tensile test for bolts and screws not expected to break in free threaded length due to head design
- Tensile test for fasteners with waisted shank
- Proof load test for finished bolts, screws and studs
- Tensile test for machined test pieces
- Head soundness test
- Hardness test
- Decarburization test
- Carburization test
- Retempering test
- Torsional test
- Impact test for machined test pieces
- Surface discontinuity inspection
- Marking
- General
- Manufacturer's identification mark
- Marking and designation of fasteners with full loadability
- Marking and designation of fasteners which, because of their geometry, have reduced
- loadability
- Marking of packages
- Relation between tensile strength and elongation after fracture
- Influence of elevated temperatures on mechanical properties of fasteners
- Elongation after fracture for full-size fasteners
- Bibliography
