Specifies hot dip galvanizing of coarse threaded steel fasteners from M8 to M64. Applies to bolts, screws, studs up to property class 10.9 and nuts up to class 12. Not recommended for diameters smaller than M8 or pitches below 1.25mm
Austenite is a non-magnetic metallic iron allotrope or solid iron-alloy solution. Forms above 1000 K (727 °C) in plain-carbon steel. Named after Sir William Chandler Roberts-Austen. Forms from alpha iron between 912-1,394 °C
Heat treating alters material properties through heating or cooling. Metals consist of grains that determine mechanical behavior. Heat treatment controls diffusion and cooling rates within microstructure
Tempering increases toughness by reducing hardness of iron-based alloys. Process performed after hardening by heating below critical point. Temperature determines amount of hardness reduction and alloy composition
17-4PH is a precipitation hardened martensitic stainless steel containing copper and niobium/tantalum. Features high strength, hardness and corrosion resistance up to 320°C. Compression strength reaches 1100-1300mpa (160-190ksi) through heat treatment. Contains 15-17.5% chromium for superior corrosion resistance
Specifies technical delivery conditions for alloy steels for quenching and tempering. Applies to various steel products including bars, rods, flat sheets, and forgings. Supersedes EN 10083-3:1995 and replaces previous national standards