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

Table 7

Compilations of basic information for current test data.

Year	Researchers	Grade	Thickness (mm)	Elongation (%)
Full annealed steels
1999	Qutinen [11]	S350	2.00	>20
2003	Lee et al. [12]	G300	0.40	No information
			0.60	No information
			1.00	No information
2009	Ranawaka and Mahendran [14]	G250	0.60	>30
			0.80	>30
			0.95	>30
2011	Kankanamge and Mahendran [15]	G250	1.55	>30
			1.95	>30
2013	Ye and Chen [17]	Q345	1.50	>30
2015	Batista Abreu [18]	S230	1.44	>20
		S345	1.15	>20
			1.55	>20
			2.58	>20
2016	Craveiro et al. [19]	S280	2.50	>20
This research		S350	1.00	32.02
		S420	1.00	29.99
Stress relieving annealed steels
2003	Lee et al. [12]	G500	1.20	No information
		G550	0.42	No information
			0.60	No information
			0.95	No information
2007	Chen and Young [13]	G450	1.90	11.3
		G550	1.00	9.8
2009	Ranawaka and Mahendran [14]	G550	0.60	<3
			0.80	<3
			0.95	<3
2011	Kankanamge and Mahendran [15]	G450	1.50	<10
			1.90	<10
2012	Chen and Ye [16]	G550	1.00	<10
This research		G500	1.20	2.76

The elongation here represents the percentage elongation after fracture of specimens at ambient temperatures. However, most researches have not given the elongation data directly; stress-strain curves are major clues to estimate the ductility of steels.