Stainless-steel Clevis Hooks CGHF

The six different sections of DIN EN 1677 deal with chain slings, chains, hooks and accessories that are subject to special loads. The requirements for the mechanics and load-bearing capacity are described, the test procedure outlined and the test intervals specified. For example, a crack test and a load test with inspection are required every three years. Property testing includes the static tensile test and a fatigue test. In addition, the requirements for production and surface quality are described. 

The cromox® Clevis Hooks CGHF are designed similar to the standard DIN EN 1677-2 and correspond to quality grade 60. This second part of DIN EN 1677 describes individual parts for lifting equipment and their safety. In particular, it deals with hooks with safety latch. It also deals with the mechanical properties of safety latches and the way in which hook dimensions are calculated. It should be noted that not only the manufacturers of these slings must comply with EN 1677, but also the users are obliged to use only products marked accordingly.

Duplex stainless steel 1.4462 or AISI 318LN is a particularly high-quality steel that is suitable for many environments. The term "duplex" refers to its two-phase microstructure, which contains both ferritic and austenitic components. This combination gives it a number of beneficial properties that make it particularly suitable for special applications such as the manufacture of high-quality clevis hooks. The identification code for this material is X2CRNiMON22-5-3. Duplex steels are known for their high strength, which is higher than that of most conventional austenitic and ferritic stainless steels.

The material AISI 318LN offers excellent resistance to many forms of corrosion, including stress corrosion cracking, pitting and crevice corrosion, which can be caused by aggressive substances and seawater, for example. Other properties of this molybdenum-added stainless steel include good ductility and toughness, which it retains even at low temperatures. This makes it suitable for applications in colder climates. The high fatigue resistance also allows this stainless steel to withstand frequently repeated loading. Despite its high strength, 1.4462 or AISI 318LN is easy to weld and forge, which is advantageous for the manufacture and assembly of additional elements such as the safety latch.