sa573gr.70 carbon plate annealing process

The Cr-Mo alloy steel pipe fittings manufactured to ASTM A234 includes the grades of WP1, WP12 CL1, WP12 CL2, WP11 CL1, WP11 CL2, WP11 CL3, WP22 CL1, WP22 CL3, WP24, WP5 CL1, WP5 CL3, WP9 CL1, WP9 CL3, WP91, WP911, WP92. The BW pipe sa573gr.70 carbon plate fittings can be made from either seamless pipes, or fusion-welded pipes which shall be with filler metal added and shall conform to the chemical requirements of the standard specification.

With the increase of temperature, the yield limit of sa573gr.70 carbon plate will decrease monotonically, but the tensile strength of sa573gr.70 carbon plate will rise to a high peak value at a certain temperature, and then decrease. This peak temperature is called the blue brittleness temperature of sa573gr.70 carbon plate. Near the blue brittleness temperature, the sa573gr.70 carbon plate strength increases and the plasticity decreases. The elongation and section shrinkage of sa573gr.70 carbon plate increase with the increase of temperature, but there is a low peak at the blue brittleness temperature. The blue brittleness temperature of low carbon steel ranges from 200 ℃ to 250 ℃. The blue brittleness of low alloy steel is not obvious as that of low carbon steel, and the blue brittleness temperature is higher.

In the cutting process of wear-resistant plate, sa573gr.70 carbon plate, the steel plate is processed first, because the steel plate is cut after cutting and marking; the commonly used cutting methods for wear-resistant plate are CNC flame cutting and numerical control water cutting, the cost of numerical control flame cutting is not very high, it belongs to primary processing, and its processing range is from 3 mm to 100 mm steel plate. And numerical control water cutting is mainly used under the condition that cutting is required not to deform.

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