1. Introduction to Q355GNHA steel plate
1. Q355GNHA is a highly weather-resistant steel plate. Weather-resistant steel forms a protective layer on the basic surface of the metal by adding a small number of alloy elements such as Cu, P, Cr, Ni, etc. to improve the atmospheric corrosion resistance of steel.
2. The brand name of Q355GNHA indicates:
"Q": the first letter of the Chinese pinyin of "Qu" indicating the yield strength of steel.
"355": Indicates the yield point value of steel plate, unit Mpa
"GNH": stands for high weather resistance and is also the pinyin abbreviation of the Chinese character for high weather resistance.
"A": Indicates the quality grade of steel plate
3. Q355GNHA steel plate implementation standard: implement GB/T4171 standard
4. Q355GNHA steel plate delivery status: hot rolled, controlled rolled, and normalized.
5. Q355GNHA steel plate thickness direction performance requirements: Z15, Z25, Z35.
6. Regular dimensions of Q355GNHA steel plate: thickness 8-150mm, width 2000-2500mm, length 6000-12000mm.
7. The same series of weathering steel plates: Q235NH, Q295NH, Q355NH, Q295GNH, Q355GNH
Q355GNHA chemical composition:
Carbon content C of Q355GNHA steel plate: ≤0.120
Silicon content Si of Q355GNHA steel plate: 0.2-0.75
Manganese content of Q355GNHA steel plate Mn: ≤1
Q355GNHA board phosphorus content P: 0.07-0.15
Q355GNHA steel plate sulfur content S: ≤0.02
Q355GNHA steel plate niobium content Nb: ≤0.015-0.06
Chromium content of Q355GNHA steel plate Cr: 0.3-1.25
Q355GNHA steel plate nickel content Ni: ≤0.065
Q355GNHA steel plate copper content Cu: 0.25-0.55
Q355GNHA steel plate aluminum content Al: ≥0.02
Molybdenum content of Q355GNHA steel plate: ≤0.3
Q355GNHA steel plate vanadium content V: 0.02-0.12
Q355GNHA steel plate titanium content Ti: 0.02-0.1
