KU-qualities for acc. chain ends and chain brackets

	Chain ends		Chain brackets
KU-Qualities	KU 4	KU 5	KU 4	KU 5
Proof strength N/mm2	125	150	125	2404)
Breaking strength N/mm2	250	3703)	280	4004)
Surface hardness in the back of the bracket			240-360	300-360
Surface hardness HV 30 in the rounding	8001)	8001)	> 600	> 600
Carburizing depth HTÄ	0,1	0,1
Hardening depth EHT	0,062)	0,062)	0,1	0,1
Material	manganese steel	Chrom- Nickel	fine grained	Chrome-Molybdane
		alloyed super-refined steel	heat treatable steel	alloyed super-refined steel

¹⁾ ± 5%
²⁾ ≥ 30 mm ø 0,05d 550 HV
³⁾ ≥ 30 mm ø tolerance 20%
⁴⁾ depending on production lot -10% possible