GB/T 4171 Q550NH Weathering Steel Plate
COR-TEN has served as weathering steel (atmospheric corrosion- resistant steel). Corten steel plate has successfully overcome rust, steel's most weakest. When exposed to the atmosphere without painting, corten steel begins to rust in the same way as ordinary steel. BUT soon the alloying elements in COR-TEN cause a protective surface layer of the fine-textured rust to form, thereby suppressing corrosion rate.
Chemical Composition of Q550NH Weathering Resistant Plate
|
Grade |
C |
Si |
Mn |
P |
S |
Cu |
Cr |
Ni |
Other element |
|
Q460NH |
≤0.16 |
≤ |
≤ |
≤0.025 |
≤0.030 |
0.20-0.55 |
0.30-1.25 |
0.12-0.65 |
a,b,c |
GB/T 4171 Q550NH Mechanical Property
|
Grade |
Tensile Test |
180 degree bending test |
||||||||||
|
Yield strength |
Tensile strength |
Elongation A/% |
||||||||||
|
≤16 |
＞16 |
＞ |
＞60 |
≤16 |
＞16 |
＞ |
＞60 |
≤6 |
＞6-16 |
＞16 |
||
|
Q550NH |
550 |
540 |
530 |
- |
620-780 |
16 |
16 |
15 |
- |
a |
2a |
3a |
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