Mechanical Properties of Steels for Cold-Formed Steel Structures at Elevated Temperatures

Table 11

Constants for Ramberg–Osgood hardening parameters.

Steel grades	T (°C)	a (×10^−4) (1/°C^2)	b (×10^−1) (1/°C)	c
S350	[300, 500]	2.646	−1.696	33.231
	(500, 700]	4.577	−3.616	80.909
S420	[300, 500]	2.111	−1.287	25.946
	(500, 700]	−6.360	8.264	−239.832
G500	[200, 400]	10.400	−5.779	110.897
	(400, 600]	6.639	−8.364	274.440