Q355NH Weather Resistant Steel Plate

Q355NH weather resistant Steel Plate is one kind of Chinese Corten Steel Plate under the standard of  GB/T 4171, now the Q355NH have new garde name: Q345NQR2(09CuPCrNi-A), Q345NQR3(09CuPTiRE-B), Q345NQR4(08CuPVRE), Q350EWR1(S350E). Q355NH weathering steel plate has high tensile strength with 490-630 Mpa.

What the Q355NH mean?

• "Q" means the abbreviation of Chinese Pinyin: “Qufu”, which means Yield Strength
• "355"  indicates the minimum yield strength 355 MPa for steel diameter or thickness ≤16mm
• "NH" denote the abbereviation of Chinese Pinyin: "Naihou", which means corten steel

Product advantage:
1. Thanks to it's good weldability and low temperature impact toughness, which helps it is suitable for architecture, artifacts such as weather resistance of weldments.
2. Excellent impact strength.
3. Good perfomance of corrosion resistance.
4. As it's corrosion resistance, it can expand the life of use and save the cost of economy.
5. It is very friendly to environment, duo to the it is anti rust, it can avoid the extra coat on surface, then we can reduce the harm to environment.

Product application:
1. In China, Q355NH and other weathering are wildly used steel bridges to anti the corrosion of rain, snow and other atmospheric conditions
2. With the increasing need for care of environment, more and more requirment of outdoor landscaping and gardening.
3 It is also be used in offshore drilling rigs and some chemical industries.

Chemical content:

Grade name	C max	Si	Mn	P	S	Cu	Ti/V	Cr	Ni	RE α
Q345NQR2	0.12	0.25-0.75	0..20-0.50	0.06-0.12	0.20 max	0.25-0.50	/	0.30-0.125	0.12-0.65	/
Q345NQR3	0.12	0.20-0.50	0.25-0.70	0.06-0.12	0.20 max	0.25-0.50	Ti 0.03 max	/	/	0.01-0.04
Q345NQR4	0.12	0.20-0.40	0.20-0.50	0.06-0.12	0.20 max	0.25-0.50	V 0.02-0.08	/	/	0.01-0.04
Q350EWR1	0.07	0.50 max	1.10 max	0.02 max	0.01 max	0.30-0.55	/	3.00-5.50	0.10-0.65	/

Remark: in the garade name "R" means hot rolled

Mechanical properties:

Grade	Yield strength Mpa				tensile strength Mpa	% Elongation min
Q355NH	16mm max	16-40mm	40-60mm	60 mm min	/	16mm max	16-40mm	40-60mm	60 mm min
	355	345	335	325	490-630	22	22	21	20

List of old and new garde name:

TB/T 1979-2014 new garde	GB/T 4171-2008
Q235NH	Q235NH
Q265NQL2	Q265GNH
Q295NQR2	Q295NH
Q295NQR3
Q310NQL2	Q310NH
Q310NQL3
Q345NQR2	Q355NH
Q345NQR3
Q345NQR4
Q350EWR1
Q400NQR1	Q415NH
Q450NQR1	Q460NH
Q450EWR1
Q500NQR1	Q500NH
Q550NQRI	Q550NH