SM490A steel plate belongs to low alloy high-strength steel, which is a structural steel produced according to Japanese standard JIS G3106, σb is 490MPa. SM490A low alloy high strength steel plate is mainly used for buildings, bridges, ships, rail vehicles, oil storage tanks, containers and other buildings requiring high weldability.
The size, shape, weight and allowable deviation of SM490A steel plate shall comply with GB/T709 standard.
Chemical composition of SM490A steel plate (% smelting analysis):
C ≤0.18 (thickness ≤50mm)
C≤0.20 (thickness>50mm)
Si≤0.55, Mn≤1.60, P≤0.035, S≤0.035
Delivery status of SM490A steel plate:
SM490A steel plates with thickness <80mm shall be hot rolled as delivered; For SM490A steel plates with thickness ≥ 80mm, the delivery status shall be normalized, and the delivery status and actual heat treatment system (insulation temperature and time) shall be indicated in the MTC.
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