a588 series high weathering bridge structural steel plate-k8凯发官网
a588 series high weathering bridge structural steel plate
1 main use
the 6 to 80mm thick a588 series high weathering bridge structural steel plates include a588gra and a588grb. such steels are alloyed by cu, p, cr, ni, etc., forming a protective layer on the surface of the metal substrate, thereby having high atmospheric corrosion resistance. this type of steel is widely used in various weather-resistant building structural parts (especially for industrial atmospheric environments) and bridge auxiliary structural parts.
2 grades and standards
grade: a588gra, a588grb
executive standard: a588/a588m
3 technical conditions of supply
3.1 product specifications:
6~100×1800~3800×l
3.2 chemical composition
table 1 chemical composition, %
牌号 | c | si | mn | p | s | cr | v | ni | cu |
a588gra | ≤0.19 | 0.30-0.65 | 0.80-1.25 | 0.040 | 0.050 | 0.40-0.65 | 0.01-0.10 | ≤0.50 | 0.25-0.40 |
a588grb | ≤0.20 | 0.15-0.50 | 0.75-1.35 | 0.040 | 0.050 | 0.40-0.70 | 0.01-0.10 | ≤0.50 | 0.20-0.40 |
3.3 mechanical properties
table 2 mechanical properties
厚度, mm | σs, mpa, ≥ | σb, mpa | δ50，% |
6-80 | ≥345 | ≥485 | ≥19 |