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

Table 6

Retention factors for the elastic modulus, yield strength, and ultimate strength.

T (°C)	S350, t = 0.96 mm			S420, t = 0.96 mm			G500, t = 1.16 mm
	20	1.000	1.000	1.000	1.000	1.000	1.000	1.000	1.000	1.000
100	0.938	0.870	0.949	0.941	0.937	0.966	1.026	0.959	0.971
200	0.967	0.787	1.052	0.967	0.677	1.004	0.976	0.977	1.057
300	1.076	0.593	1.054	1.056	0.573	1.041	0.913	0.836	0.914
350	0.938	0.488	0.845	0.821	0.524	0.857	—	—	—
400	0.891	0.467	0.680	0.785	0.467	0.689	0.610	0.665	0.707
500	0.602	0.321	0.381	0.578	0.319	0.384	0.466	0.357	0.396
600	0.287	0.176	0.181	0.314	0.182	0.192	0.253	0.065	0.094
700	0.159	0.070	0.068	0.167	0.070	0.074	—	—	—