Kette / Bergbau

HO steel for your chain

HO (Highly Optimised) steel was developed by JDT particularly for the mining chain application. Due to precise alloying with tungsten, JDT has achie-ved significantly higher toughness even by high strength in comparison to standard steel 1.6758 according to DIN 17115. Resistance to stress corrosion cracking was also increased (see Figure). Chains made of HO steel reach significant increase of performance, durability and operational safety. This previously patented HO steel is also used for the lifting chain programme ENORM and is a basis for the real Grade 100 according to DIN EN 818.

Standard 1.6758
DIN 17115 HO
Toughness >60 J >85 J
Resistance to dynamic stress 100% 140%
Resistance to corrosion and to stress corrosion cracking 100% 110%
Strength 1225 MPa 1350 MPa
Wear resistance 100% 110%
Fatigue strength 100% 115%

Advantages of HO steel vs. steel 1.6758 according to DIN 17115.

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