DD11, DD12, DD14 Hot Rolled Steel Sheets and Strips

 DD11, DD12, DD14 Steel sheets, strips and plates from low carbon steel (plates) are made by hot rolling. They are delivered in thicknesses from 1,5 to 12,5 mm. The sheets up to thickness 3,0 mm may be split longitudinally and thickness up to 4,0 mm may be split longitudinally or transversally, in various diemensions.

Standards:

Technical terms of deliveries	EN 10111
Dimensional and shape deviation tolerances	EN 10051

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 DD11, DD12, DD14 Material Application: 

For the parts of cars that are stressed dynamically; thore are distinguished by an increased cold mouldability.

  Grade Steel DD11, DD12, DD14 Mechanical properties^a):

Steel designation	Mechanical properties b)
	ReL c)		Rm max. Mpa	Elongation – minimum
	1,0 mm ≤ e e < 2 mm MPa	2 mm ≤ e e ≤ 11 mm MPa		Lo = 80 mm
				1,0 mm ≤ e e < 1,5 mm %	1,5 mm ≤ e e < 2 mm %	2 mm ≤ e e < 3 mm %
DD11 d)	170 - 360	170 - 340	440	22	23	24
DD12	170 - 340	170 - 320	420	24	25	26
DD13	170 - 330	170 - 310	400	27	28	29
DD14	170 - 310	170 - 290	380	30	31	32

a) Mechanical properties are valid for the hot rolled products, without descaling or descaled chemically and oiled, cold re-rolled or not cold re-rolled.
b) If the product width allows, test samples are taken for the tension test, which is performed crosswise to the rolling direction.
c) If the product doesn´t show a substantial Yield Limit ReL, the contractual Yield Limit Rp0,2 must be used. 
d) It is recommended that the products made of material marke DD11 are formed within 6 weeks from the time of their availability.