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BS ISO 3506-5:2022 Fasteners. Mechanical properties of corrosion-resistant stainless steel fasteners - Special fasteners (also including fasteners from nickel alloys) for high temperature applications, 2022
- National foreword
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbols
- 5 Designation system for fasteners made from stainless steels and nickel alloys
- 6 Materials and manufacture [Go to Page]
- 6.1 Chemical composition
- 6.2 Heat treatment for fasteners
- 6.3 Finish
- 6.4 Design of bolt/nut assemblies
- 6.5 Service temperatures for fasteners
- 7 Mechanical and physical properties [Go to Page]
- 7.1 Mechanical properties of bolts, screws and studs
- 7.2 Mechanical properties of nuts
- 8 Applicability of test methods and inspection [Go to Page]
- 8.1 Applicability of test methods
- 8.2 Manufacturer’s inspection
- 8.3 Supplier’s inspection
- 8.4 Purchaser’s inspection
- 8.5 Delivery of test results
- 9 Test methods at ambient temperature [Go to Page]
- 9.1 Tensile test for bolts, screws and studs at ambient temperature [Go to Page]
- 9.1.1 General
- 9.1.2 Applicability
- 9.1.3 Apparatus and testing device
- 9.1.4 General test procedure
- 9.1.5 Test procedure for the simultaneous determination of Rmf, Rpf, and A
- 9.1.6 Reference test procedure for the determination of stress at 0,2 % non-proportional elongation, Rpf
- 9.1.7 Alternative test procedure for the determination of elongation, A
- 9.1.8 Test results and requirements for tensile strength, Rmf
- 9.1.9 Test results and requirements for stress at 0,2 % non-proportional elongation, Rpf
- 9.1.10 Test results and requirements for elongation after fracture, A
- 9.2 Hardness test for bolts, screws and studs [Go to Page]
- 9.2.1 General
- 9.2.2 Test procedure
- 9.2.3 Test results and requirements for hardness
- 9.3 Proof load test for nuts [Go to Page]
- 9.3.1 General
- 9.3.2 Applicability
- 9.3.3 Apparatus and testing device
- 9.3.4 Test procedure
- 9.3.5 Additional testing procedure for prevailing torque nuts
- 9.3.6 Test results and requirements for nut proof load
- 9.4 Hardness test for nuts [Go to Page]
- 9.4.1 General
- 9.4.2 Test procedure
- 9.4.3 Test results and requirements for nut hardness
- 10 Test methods at high temperature [Go to Page]
- 10.1 High temperature tensile test for bolts, screws, studs and nuts [Go to Page]
- 10.1.1 General
- 10.1.2 Test apparatus
- 10.1.3 Test procedure
- 10.1.4 Test report
- 10.2 High temperature stress rupture test for bolts, screws, studs and nuts [Go to Page]
- 10.2.1 General
- 10.2.2 Test apparatus and testing device
- 10.2.3 Test procedure
- 10.2.4 Test report
- 10.3 Relaxation test for bolts, screws, studs and nuts [Go to Page]
- 10.3.1 General
- 10.3.2 Bolted joint models
- 10.3.3 Test apparatus and measuring devices
- 10.3.4 Test procedure
- 10.3.5 Test results
- 10.3.6 Test report
- 10.4 Creep test
- 11 Fastener marking and labelling [Go to Page]
- 11.1 General requirements for marking
- 11.2 Manufacturer's identification mark
- 11.3 Marking on the fasteners [Go to Page]
- 11.3.1 Hexagon head bolts and screws and hexagon nuts
- 11.3.2 Hexagon socket and hexalobular socket bolts and screws
- 11.3.3 Other types of bolts, screws and nuts
- 11.3.4 Studs (one-end and double-end studs)
- 11.3.5 Fully threaded studs
- 11.3.6 Left-hand thread marking
- 11.4 Marking of the packages (labelling)
- Annex A (informative) Tempering of martensitic stainless steels
- Bibliography [Go to Page]
