Mechanical Behavior of High-Strength Bolted Joints Fabricated from Fire-Resistant Steel at Elevated Temperatures

Table 3

Mechanical behavior of the fire-resistant and high-strength grade 10.9 bolt.

Size	Rp0.2 (MPa)	Rm (MPa)	Elongation A (%)	Area reduction (%)	Rockwell hardness HRC	Impact energy at room temperature Akv/J	Yield strength held at 600°C for 180 min (MPa)
M20	1041	1075	21.5	66	35.2	152	513