What dose the influence of 16mo3 steel plate sulfur (S) elements on the weldability?

16mo3 steel plate Sulfur in the steel is often present in the form of iron sulfide, and the reticular distribution at grain boundaries, thereby significantly reducing the toughness of the steel. Iron plus iron sulfide lower eutectic temperature (985 ° C) Thus, during thermal processing, since the machining start temperature is generally 1150 to 1200 ° C, while the iron and iron sulfide eutectic has melted, resulting in processing cracking this phenomenon is called "sulfur hot brittleness." Sulfur this nature of the steel to hot cracking at welding. Therefore, it is generally on the content of sulfur in the steel are strictly controlled. Ordinary carbon steel, quality carbon steel and high quality steel, the main difference lies in how much of the sulfur and phosphorus content.

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