Technical data provided by HILTI indicates that their proprietary HAS-R stainless steel (ASTM F593) threaded rods in 3/8” to 1” diameters are considered brittle steel elements, Technical data provided by HILTI indicates the Condition of the ASTM F593 stainless steel (Types 304 and 316) HAS-R anchor bolts is found in CW1 (fy = 60 ksi) and CW2 (fy = 40 ksi). Based on ASTM F593 the elongation of CW1 SS is 20% in 4D which is greater than the 14% listed in ACI to be classified as a ductile element. Additionally there is a favorable gap between the yield and ultimate stress of the steel to preclude a sudden fracture after yield. Why is HILTI designating these SS materials as brittle?
Hi David,
Hilti's threaded rods are considered brittle or ductile based on their ASTM specification. Please reach out to hnatechnicalservices@hilti.com or give us a call at 877-749-6337 for more information specifically related to the HAS-R threaded rod.
Regards,
Matthew