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GB/T 4171 Q295GNH grade steel is a kind of weathering steel or atmospheric corrosion resistant steel. Q295GNH steel plate is a high weathering steel, delivered in hot rolled, controlled rolling, or normalized condition. GB/T 4171 standard specifies the size, shape, weight and allowable deviation of weather-resistant structural steel, technical gb t 4171 q295gnh atmospheric corrosion resistant steel China GB/T 4171 Q355GNH Weather Resistant Steel Plate GB/T4171 Q355NH Weathering steel is characterized by a protective rust layer resistant to atmospheric corrosion.Compared with carbon steel,weathering steel in the atmosphere has a more excellent corrosion resistance.Q355GNH steel under GB/T 4171 standard which is a kind of weathering steel.
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